Prompt:
Complete this text code:

Name:        nginx
Namespace:   default
Selector:    app=nginx
Labels:      app=nginx
Annotations:    <none>
Replicas:    3 current / 3 desired
Pods Status: 0 Running / 3 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:       app=nginx
  Containers:
   nginx:

Response:
    Image:              nginx
    Port:               80/TCP
    Environment:        <none>
    Mounts:             <none>
  Volumes:              <none>
Events:
  FirstSeen       LastSeen     Count    From                        SubobjectPath    Type      Reason              Message
  ---------       --------     -----    ----                        -------------    ----      ------              -------
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-qrm3m
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-3ntk0
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-4ok8v

Context: ReplicationController | Here, three pods are created, but none is running yet, perhaps because the image is being pulled. A little later, the same command may show:


Prompt:
Explain this text code:

Name:        nginx
Namespace:   default
Selector:    app=nginx
Labels:      app=nginx
Annotations:    <none>
Replicas:    3 current / 3 desired
Pods Status: 0 Running / 3 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:       app=nginx
  Containers:
   nginx:
    Image:              nginx
    Port:               80/TCP
    Environment:        <none>
    Mounts:             <none>
  Volumes:              <none>
Events:
  FirstSeen       LastSeen     Count    From                        SubobjectPath    Type      Reason              Message
  ---------       --------     -----    ----                        -------------    ----      ------              -------
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-qrm3m
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-3ntk0
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-4ok8v

Response: This text code ReplicationController | Here, three pods are created, but none is running yet, perhaps because the image is being pulled. A little later, the same command may show:


Prompt:
Explain this text code:

Pods Status:    3 Running / 0 Waiting / 0 Succeeded / 0 Failed

Response: This text code ReplicationController | To list all the pods that belong to the ReplicationController in a machine readable form, you can use a command like this:

Context: ReplicationController | To list all the pods that belong to the ReplicationController in a machine readable form, you can use a command like this:


Prompt:
Explain this text code:

pods=$(kubectl get pods --selector=app=nginx --output=jsonpath={.items..metadata.name})
echo $pods

Response: This text code ReplicationController | The output is similar to this:

Context: ReplicationController | The output is similar to this:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:

Response:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

Context: ReplicationController | Run the example job by downloading the example file and then running this command:


Prompt:
Explain this yaml code:

apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

Response: This yaml code ReplicationController | Run the example job by downloading the example file and then running this command:


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/controllers/replication.yaml

Response: This shell code ReplicationController | The output is similar to this:


Prompt:
Complete this text code:

Name:        nginx
Namespace:   default
Selector:    app=nginx
Labels:      app=nginx
Annotations:    <none>
Replicas:    3 current / 3 desired
Pods Status: 0 Running / 3 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:       app=nginx
  Containers:
   nginx:

Response:
    Image:              nginx
    Port:               80/TCP
    Environment:        <none>
    Mounts:             <none>
  Volumes:              <none>
Events:
  FirstSeen       LastSeen     Count    From                        SubobjectPath    Type      Reason              Message
  ---------       --------     -----    ----                        -------------    ----      ------              -------
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-qrm3m
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-3ntk0
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-4ok8v


Prompt:
Explain this text code:

Name:        nginx
Namespace:   default
Selector:    app=nginx
Labels:      app=nginx
Annotations:    <none>
Replicas:    3 current / 3 desired
Pods Status: 0 Running / 3 Waiting / 0 Succeeded / 0 Failed
Pod Template:
  Labels:       app=nginx
  Containers:
   nginx:
    Image:              nginx
    Port:               80/TCP
    Environment:        <none>
    Mounts:             <none>
  Volumes:              <none>
Events:
  FirstSeen       LastSeen     Count    From                        SubobjectPath    Type      Reason              Message
  ---------       --------     -----    ----                        -------------    ----      ------              -------
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-qrm3m
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-3ntk0
  20s             20s          1        {replication-controller }                    Normal    SuccessfulCreate    Created pod: nginx-4ok8v

Response: This text code ReplicationController | Here, three pods are created, but none is running yet, perhaps because the image is being pulled. A little later, the same command may show:


Prompt:
Explain this shell code:

Pods Status:    3 Running / 0 Waiting / 0 Succeeded / 0 Failed

Response: This shell code ReplicationController | To list all the pods that belong to the ReplicationController in a machine readable form, you can use a command like this:


Prompt:
Explain this shell code:

pods=$(kubectl get pods --selector=app=nginx --output=jsonpath={.items..metadata.name})
echo $pods

Response: This shell code ReplicationController | The output is similar to this:


Prompt:
Complete this yaml code:

controllers/replication.yaml
apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:

Response:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

controllers/replication.yaml
apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

Response: This yaml code ReplicationController | Run the example job by downloading the example file and then running this command:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:

Response:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: ReplicationController
metadata:
  name: nginx
spec:
  replicas: 3
  selector:
    app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

Response: This yaml code ReplicationController | Run the example job by downloading the example file and then running this command:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/controllers/replication.yaml

Response: This bash code ReplicationController | The output is similar to this:


Prompt:
Explain this text code:

Pods Status:    3 Running / 0 Waiting / 0 Succeeded / 0 Failed

Response: This text code ReplicationController | To list all the pods that belong to the ReplicationController in a machine readable form, you can use a command like this:


Prompt:
Explain this text code:

pods=$(kubectl get pods --selector=app=nginx --output=jsonpath={.items..metadata.name})
echo $pods

Response: This text code ReplicationController | The output is similar to this:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr

Response:
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"

Context: Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:

Context: Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Guaranteed. The output also verifies that the Pod Container has a memory request that matches its memory limit, and it has a CPU request th

Context: Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Guaranteed. The output also verifies that the Pod Container has a memory request that matches its memory limit, and it has a CPU request th


Prompt:
Complete this text code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m

Response:
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed

Context: Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this text code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | A Pod is given a QoS class of Burstable if:

Context: Configure Quality of Service for Pods | A Pod is given a QoS class of Burstable if:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-2.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-2 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:

Context: Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this text code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:

Response:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable


Prompt:
Explain this text code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo-2 --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | For a Pod to be given a QoS class of BestEffort, the Containers in the Pod must not have any memory or CPU limits or requests.

Context: Configure Quality of Service for Pods | For a Pod to be given a QoS class of BestEffort, the Containers in the Pod must not have any memory or CPU limits or requests.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3

Response:
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-3.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-3 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of BestEffort:

Context: Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of BestEffort:


Prompt:
Complete this text code:

spec:
  containers:
    ...

Response:
    resources: {}
  ...
status:
  qosClass: BestEffort


Prompt:
Explain this text code:

spec:
  containers:
    ...
    resources: {}
  ...
status:
  qosClass: BestEffort

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo-3 --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | Here is a manifest for a Pod that has two Containers. One container specifies a memory request of 200 MiB. The other Container does not specify any requests or limits.

Context: Configure Quality of Service for Pods | Here is a manifest for a Pod that has two Containers. One container specifies a memory request of 200 MiB. The other Container does not specify any requests or limits.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis

Context: Configure Quality of Service for Pods | Notice that this Pod meets the criteria for QoS class Burstable. That is, it does not meet the criteria for QoS class Guaranteed, and one of its Containers has a memory request.


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis

Response: This yaml code Configure Quality of Service for Pods | Notice that this Pod meets the criteria for QoS class Burstable. That is, it does not meet the criteria for QoS class Guaranteed, and one of its Containers has a memory request.


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-4.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-4 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this text code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:

Response:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable

Context: Configure Quality of Service for Pods | Rather than see all the fields, you can view just the field you need:


Prompt:
Explain this text code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable

Response: This text code Configure Quality of Service for Pods | Rather than see all the fields, you can view just the field you need:


Prompt:
Explain this bash code:

kubectl --namespace=qos-example get pod qos-demo-4 -o jsonpath='{ .status.qosClass}{"\n"}'

Response: This bash code Configure Quality of Service for Pods | Delete your namespace:

Context: Configure Quality of Service for Pods | Delete your namespace:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr

Response:
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod.yaml --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this shell code:

kubectl get pod qos-demo --namespace=qos-example --output=yaml

Response: This shell code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Guaranteed. The output also verifies that the Pod Container has a memory request that matches its memory limit, and it has a CPU request th


Prompt:
Complete this yaml code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m

Response:
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed


Prompt:
Explain this yaml code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed

Response: This yaml code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this shell code:

kubectl delete pod qos-demo --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | A Pod is given a QoS class of Burstable if:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-2.yaml --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this shell code:

kubectl get pod qos-demo-2 --namespace=qos-example --output=yaml

Response: This shell code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this yaml code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:

Response:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable


Prompt:
Explain this yaml code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable

Response: This yaml code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this shell code:

kubectl delete pod qos-demo-2 --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | For a Pod to be given a QoS class of BestEffort, the Containers in the Pod must not have any memory or CPU limits or requests.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3

Response:
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-3.yaml --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this shell code:

kubectl get pod qos-demo-3 --namespace=qos-example --output=yaml

Response: This shell code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of BestEffort:


Prompt:
Complete this yaml code:

spec:
  containers:
    ...

Response:
    resources: {}
  ...
status:
  qosClass: BestEffort


Prompt:
Explain this yaml code:

spec:
  containers:
    ...
    resources: {}
  ...
status:
  qosClass: BestEffort

Response: This yaml code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this shell code:

kubectl delete pod qos-demo-3 --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | Here is a manifest for a Pod that has two Containers. One container specifies a memory request of 200 MiB. The other Container does not specify any requests or limits.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis

Response: This yaml code Configure Quality of Service for Pods | Notice that this Pod meets the criteria for QoS class Burstable. That is, it does not meet the criteria for QoS class Guaranteed, and one of its Containers has a memory request.


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-4.yaml --namespace=qos-example

Response: This shell code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this shell code:

kubectl get pod qos-demo-4 --namespace=qos-example --output=yaml

Response: This shell code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this yaml code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:

Response:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable


Prompt:
Explain this yaml code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable

Response: This yaml code Configure Quality of Service for Pods | Rather than see all the fields, you can view just the field you need:


Prompt:
Explain this bash code:

kubectl --namespace=qos-example get pod qos-demo-4 -o jsonpath='{ .status.qosClass}{"\n"}'

Response: This bash code Configure Quality of Service for Pods | Delete your namespace:


Prompt:
Complete this yaml code:

pods/qos/qos-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"


Prompt:
Explain this yaml code:

pods/qos/qos-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr

Response:
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
        cpu: "700m"
      requests:
        memory: "200Mi"
        cpu: "700m"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Guaranteed. The output also verifies that the Pod Container has a memory request that matches its memory limit, and it has a CPU request th


Prompt:
Complete this text code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m

Response:
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed


Prompt:
Explain this text code:

spec:
  containers:
    ...
    resources:
      limits:
        cpu: 700m
        memory: 200Mi
      requests:
        cpu: 700m
        memory: 200Mi
    ...
status:
  qosClass: Guaranteed

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | A Pod is given a QoS class of Burstable if:


Prompt:
Complete this yaml code:

pods/qos/qos-pod-2.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:

Response:
  containers:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"


Prompt:
Explain this yaml code:

pods/qos/qos-pod-2.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-2
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-2-ctr
    image: nginx
    resources:
      limits:
        memory: "200Mi"
      requests:
        memory: "100Mi"

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-2.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-2 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this text code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:

Response:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable


Prompt:
Explain this text code:

spec:
  containers:
  - image: nginx
    imagePullPolicy: Always
    name: qos-demo-2-ctr
    resources:
      limits:
        memory: 200Mi
      requests:
        memory: 100Mi
  ...
status:
  qosClass: Burstable

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo-2 --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | For a Pod to be given a QoS class of BestEffort, the Containers in the Pod must not have any memory or CPU limits or requests.


Prompt:
Complete this yaml code:

pods/qos/qos-pod-3.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3

Response:
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx


Prompt:
Explain this yaml code:

pods/qos/qos-pod-3.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3

Response:
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-3
  namespace: qos-example
spec:
  containers:
  - name: qos-demo-3-ctr
    image: nginx

Response: This yaml code Configure Quality of Service for Pods | Create the Pod:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-3.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-3 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of BestEffort:


Prompt:
Complete this text code:

spec:
  containers:
    ...

Response:
    resources: {}
  ...
status:
  qosClass: BestEffort


Prompt:
Explain this text code:

spec:
  containers:
    ...
    resources: {}
  ...
status:
  qosClass: BestEffort

Response: This text code Configure Quality of Service for Pods | Delete your Pod:


Prompt:
Explain this bash code:

kubectl delete pod qos-demo-3 --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | Here is a manifest for a Pod that has two Containers. One container specifies a memory request of 200 MiB. The other Container does not specify any requests or limits.


Prompt:
Complete this yaml code:

pods/qos/qos-pod-4.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis


Prompt:
Explain this yaml code:

pods/qos/qos-pod-4.yaml
apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis

Response: This yaml code Configure Quality of Service for Pods | Notice that this Pod meets the criteria for QoS class Burstable. That is, it does not meet the criteria for QoS class Guaranteed, and one of its Containers has a memory request.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

Response:
  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: qos-demo-4
  namespace: qos-example
spec:
  containers:

  - name: qos-demo-4-ctr-1
    image: nginx
    resources:
      requests:
        memory: "200Mi"

  - name: qos-demo-4-ctr-2
    image: redis

Response: This yaml code Configure Quality of Service for Pods | Notice that this Pod meets the criteria for QoS class Burstable. That is, it does not meet the criteria for QoS class Guaranteed, and one of its Containers has a memory request.


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/qos/qos-pod-4.yaml --namespace=qos-example

Response: This bash code Configure Quality of Service for Pods | View detailed information about the Pod:


Prompt:
Explain this bash code:

kubectl get pod qos-demo-4 --namespace=qos-example --output=yaml

Response: This bash code Configure Quality of Service for Pods | The output shows that Kubernetes gave the Pod a QoS class of Burstable:


Prompt:
Complete this text code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:

Response:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable


Prompt:
Explain this text code:

spec:
  containers:
    ...
    name: qos-demo-4-ctr-1
    resources:
      requests:
        memory: 200Mi
    ...
    name: qos-demo-4-ctr-2
    resources: {}
    ...
status:
  qosClass: Burstable

Response: This text code Configure Quality of Service for Pods | Rather than see all the fields, you can view just the field you need:


Prompt:
Explain this bash code:

kubectl --namespace=qos-example get pod qos-demo-4 -o jsonpath='{ .status.qosClass}{"\n"}'

Response: This bash code Configure Quality of Service for Pods | Delete your namespace:


Prompt:
Complete this text code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/

Response:
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard

Context: Deploy and Access the Kubernetes Dashboard | To protect your cluster data, Dashboard deploys with a minimal RBAC configuration by default. Currently, Dashboard only supports logging in with a Bearer Token. To create a token for this demo, you ca


Prompt:
Explain this text code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard

Response: This text code Deploy and Access the Kubernetes Dashboard | To protect your cluster data, Dashboard deploys with a minimal RBAC configuration by default. Currently, Dashboard only supports logging in with a Bearer Token. To create a token for this demo, you ca


Prompt:
Explain this bash code:

kubectl -n kubernetes-dashboard port-forward svc/kubernetes-dashboard-kong-proxy 8443:443

Response: This bash code Deploy and Access the Kubernetes Dashboard | Kubectl will make Dashboard available at https://localhost:8443.

Context: Deploy and Access the Kubernetes Dashboard | Kubectl will make Dashboard available at https://localhost:8443.


Prompt:
Complete this text code:

release=1.0
tier=frontend

Response:
environment=pod
track=stable

Context: Deploy and Access the Kubernetes Dashboard | Namespace: Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces. They let you partition resources into logically named groups


Prompt:
Explain this text code:

release=1.0
tier=frontend
environment=pod
track=stable

Response: This text code Deploy and Access the Kubernetes Dashboard | Namespace: Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces. They let you partition resources into logically named groups


Prompt:
Complete this shell code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/

Response:
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard


Prompt:
Explain this shell code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard

Response: This shell code Deploy and Access the Kubernetes Dashboard | To protect your cluster data, Dashboard deploys with a minimal RBAC configuration by default. Currently, Dashboard only supports logging in with a Bearer Token. To create a token for this demo, you ca


Prompt:
Explain this bash code:

kubectl -n kubernetes-dashboard port-forward svc/kubernetes-dashboard-kong-proxy 8443:443

Response: This bash code Deploy and Access the Kubernetes Dashboard | Kubectl will make Dashboard available at https://localhost:8443.


Prompt:
Complete this conf code:

release=1.0
tier=frontend

Response:
environment=pod
track=stable


Prompt:
Explain this conf code:

release=1.0
tier=frontend
environment=pod
track=stable

Response: This conf code Deploy and Access the Kubernetes Dashboard | Namespace: Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces. They let you partition resources into logically named groups


Prompt:
Complete this text code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/

Response:
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard


Prompt:
Explain this text code:

# Add kubernetes-dashboard repository
helm repo add kubernetes-dashboard https://kubernetes.github.io/dashboard/
# Deploy a Helm Release named "kubernetes-dashboard" using the kubernetes-dashboard chart
helm upgrade --install kubernetes-dashboard kubernetes-dashboard/kubernetes-dashboard --create-namespace --namespace kubernetes-dashboard

Response: This text code Deploy and Access the Kubernetes Dashboard | To protect your cluster data, Dashboard deploys with a minimal RBAC configuration by default. Currently, Dashboard only supports logging in with a Bearer Token. To create a token for this demo, you ca


Prompt:
Explain this text code:

nameserver 10.32.0.10
search <namespace>.svc.cluster.local svc.cluster.local cluster.local
options ndots:5

Response: This text code DNS for Services and Pods | In summary, a Pod in the test namespace can successfully resolve either data.prod or data.prod.svc.cluster.local.

Context: DNS for Services and Pods | In summary, a Pod in the test namespace can successfully resolve either data.prod or data.prod.svc.cluster.local.


Prompt:
Explain this text code:

<pod-IPv4-address>.<namespace>.pod.<cluster-domain>

Response: This text code DNS for Services and Pods | For example, if a Pod in the default namespace has the IP address 172.17.0.3, and the domain name for your cluster is cluster.local, then the Pod has a DNS name:

Context: DNS for Services and Pods | For example, if a Pod in the default namespace has the IP address 172.17.0.3, and the domain name for your cluster is cluster.local, then the Pod has a DNS name:


Prompt:
Explain this text code:

<pod-ipv4-address>.<service-name>.<my-namespace>.svc.<cluster-domain.example>

Response: This text code DNS for Services and Pods | For example, if a Pod in the cafe namespace has the IP address 172.17.0.3, is an endpoint of a Service named barista, and the domain name for your cluster is cluster.local, then the Pod would have thi

Context: DNS for Services and Pods | For example, if a Pod in the cafe namespace has the IP address 172.17.0.3, is an endpoint of a Service named barista, and the domain name for your cluster is cluster.local, then the Pod would have thi


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain

Response:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox

Context: DNS for Services and Pods | Given the above Service "busybox-subdomain" and the Pods which set spec.subdomain to "busybox-subdomain", the first Pod will see its own FQDN as "busybox-1.busybox-subdomain.my-namespace.svc.cluster-d


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox

Response: This yaml code DNS for Services and Pods | Given the above Service "busybox-subdomain" and the Pods which set spec.subdomain to "busybox-subdomain", the first Pod will see its own FQDN as "busybox-1.busybox-subdomain.my-namespace.svc.cluster-d


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28

Response:
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet

Context: DNS for Services and Pods | Pod's DNS Config allows users more control on the DNS settings for a Pod.


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet

Response: This yaml code DNS for Services and Pods | Pod's DNS Config allows users more control on the DNS settings for a Pod.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"

Response:
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0

Context: DNS for Services and Pods | When the Pod above is created, the container test gets the following contents in its /etc/resolv.conf file:


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0

Response: This yaml code DNS for Services and Pods | When the Pod above is created, the container test gets the following contents in its /etc/resolv.conf file:


Prompt:
Explain this text code:

nameserver 192.0.2.1
search ns1.svc.cluster-domain.example my.dns.search.suffix
options ndots:2 edns0

Response: This text code DNS for Services and Pods | For IPv6 setup, search path and name server should be set up like this:

Context: DNS for Services and Pods | For IPv6 setup, search path and name server should be set up like this:


Prompt:
Explain this bash code:

kubectl exec -it dns-example -- cat /etc/resolv.conf

Response: This bash code DNS for Services and Pods | The output is similar to this:

Context: DNS for Services and Pods | The output is similar to this:


Prompt:
Explain this text code:

nameserver 2001:db8:30::a
search default.svc.cluster-domain.example svc.cluster-domain.example cluster-domain.example
options ndots:5

Response: This text code DNS for Services and Pods | Kubernetes itself does not limit the DNS Config until the length of the search domain list exceeds 32 or the total length of all search domains exceeds 2048. This limit applies to the node's resolver

Context: DNS for Services and Pods | Kubernetes itself does not limit the DNS Config until the length of the search domain list exceeds 32 or the total length of all search domains exceeds 2048. This limit applies to the node's resolver


Prompt:
Explain this text code:

nameserver 10.32.0.10
search <namespace>.svc.cluster.local svc.cluster.local cluster.local
options ndots:5

Response: This text code DNS for Services and Pods | In summary, a Pod in the test namespace can successfully resolve either data.prod or data.prod.svc.cluster.local.


Prompt:
Explain this text code:

_port-name._port-protocol.my-svc.my-namespace.svc.cluster-domain.example

Response: This text code DNS for Services and Pods | Kube-DNS versions, prior to the implementation of the DNS specification, had the following DNS resolution:

Context: DNS for Services and Pods | Kube-DNS versions, prior to the implementation of the DNS specification, had the following DNS resolution:


Prompt:
Explain this text code:

hostname.my-svc.my-namespace.svc.cluster-domain.example

Response: This text code DNS for Services and Pods | Kube-DNS versions, prior to the implementation of the DNS specification, had the following DNS resolution:


Prompt:
Explain this text code:

<pod-IPv4-address>.<namespace>.pod.<cluster-domain>

Response: This text code DNS for Services and Pods | For example, if a Pod in the default namespace has the IP address 172.17.0.3, and the domain name for your cluster is cluster.local, then the Pod has a DNS name:


Prompt:
Explain this text code:

<pod-ipv4-address>.<service-name>.<my-namespace>.svc.<cluster-domain.example>

Response: This text code DNS for Services and Pods | For example, if a Pod in the cafe namespace has the IP address 172.17.0.3, is an endpoint of a Service named barista, and the domain name for your cluster is cluster.local, then the Pod would have thi


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain

Response:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox

Response: This yaml code DNS for Services and Pods | Given the above Service "busybox-subdomain" and the Pods which set spec.subdomain to "busybox-subdomain", the first Pod will see its own FQDN as "busybox-1.busybox-subdomain.my-namespace.svc.cluster-d


Prompt:
Explain this text code:

"busybox-1.busybox-subdomain.my-namespace.svc.cluster-domain.example"

Response: This text code DNS for Services and Pods | An EndpointSlice can specify the DNS hostname for any endpoint addresses, along with its IP.

Context: DNS for Services and Pods | An EndpointSlice can specify the DNS hostname for any endpoint addresses, along with its IP.


Prompt:
Explain this text code:

busybox-subdomain.my-namespace.svc.cluster-domain.example

Response: This text code DNS for Services and Pods | When a Pod is configured to have fully qualified domain name (FQDN), its hostname is the short hostname. For example, if you have a Pod with the fully qualified domain name busybox-1.busybox-subdomain

Context: DNS for Services and Pods | When a Pod is configured to have fully qualified domain name (FQDN), its hostname is the short hostname. For example, if you have a Pod with the fully qualified domain name busybox-1.busybox-subdomain


Prompt:
Explain this text code:

busybox-1.busybox-subdomain.my-namespace.svc.cluster-domain.example

Response: This text code DNS for Services and Pods | When you set setHostnameAsFQDN: true in the Pod spec, the kubelet writes the Pod's FQDN into the hostname for that Pod's namespace. In this case, both hostname and hostname --fqdn return the Pod's FQD

Context: DNS for Services and Pods | When you set setHostnameAsFQDN: true in the Pod spec, the kubelet writes the Pod's FQDN into the hostname for that Pod's namespace. In this case, both hostname and hostname --fqdn return the Pod's FQD


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28

Response:
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet

Response: This yaml code DNS for Services and Pods | Pod's DNS Config allows users more control on the DNS settings for a Pod.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"

Response:
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0

Response: This yaml code DNS for Services and Pods | When the Pod above is created, the container test gets the following contents in its /etc/resolv.conf file:


Prompt:
Explain this text code:

nameserver 192.0.2.1
search ns1.svc.cluster-domain.example my.dns.search.suffix
options ndots:2 edns0

Response: This text code DNS for Services and Pods | For IPv6 setup, search path and name server should be set up like this:


Prompt:
Explain this shell code:

kubectl exec -it dns-example -- cat /etc/resolv.conf

Response: This shell code DNS for Services and Pods | The output is similar to this:


Prompt:
Explain this text code:

nameserver 2001:db8:30::a
search default.svc.cluster-domain.example svc.cluster-domain.example cluster-domain.example
options ndots:5

Response: This text code DNS for Services and Pods | Kubernetes itself does not limit the DNS Config until the length of the search domain list exceeds 32 or the total length of all search domains exceeds 2048. This limit applies to the node's resolver


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain

Response:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: busybox-subdomain
spec:
  selector:
    name: busybox
  clusterIP: None
  ports:
  - name: foo # name is not required for single-port Services
    port: 1234
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox1
  labels:
    name: busybox
spec:
  hostname: busybox-1
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox
---
apiVersion: v1
kind: Pod
metadata:
  name: busybox2
  labels:
    name: busybox
spec:
  hostname: busybox-2
  subdomain: busybox-subdomain
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    name: busybox

Response: This yaml code DNS for Services and Pods | Given the above Service "busybox-subdomain" and the Pods which set spec.subdomain to "busybox-subdomain", the first Pod will see its own FQDN as "busybox-1.busybox-subdomain.my-namespace.svc.cluster-d


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28

Response:
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox:1.28
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
  hostNetwork: true
  dnsPolicy: ClusterFirstWithHostNet

Response: This yaml code DNS for Services and Pods | Pod's DNS Config allows users more control on the DNS settings for a Pod.


Prompt:
Complete this yaml code:

service/networking/custom-dns.yaml
apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx

Response:
  dnsPolicy: "None"
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0


Prompt:
Explain this yaml code:

service/networking/custom-dns.yaml
apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0

Response: This yaml code DNS for Services and Pods | When the Pod above is created, the container test gets the following contents in its /etc/resolv.conf file:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"

Response:
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  namespace: default
  name: dns-example
spec:
  containers:
    - name: test
      image: nginx
  dnsPolicy: "None"
  dnsConfig:
    nameservers:
      - 192.0.2.1 # this is an example
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
    options:
      - name: ndots
        value: "2"
      - name: edns0

Response: This yaml code DNS for Services and Pods | When the Pod above is created, the container test gets the following contents in its /etc/resolv.conf file:


Prompt:
Explain this bash code:

kubectl exec -it dns-example -- cat /etc/resolv.conf

Response: This bash code DNS for Services and Pods | The output is similar to this:


Prompt:
Explain this bash code:

kubectl get --raw /metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This bash code Adopting Sidecar Containers | For the individual node:

Context: Adopting Sidecar Containers | For the individual node:


Prompt:
Explain this bash code:

kubectl get --raw /api/v1/nodes/<node-name>/proxy/metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This bash code Adopting Sidecar Containers | If you see something like this:

Context: Adopting Sidecar Containers | If you see something like this:


Prompt:
Explain this text code:

kubernetes_feature_enabled{name="SidecarContainers",stage="BETA"} 1

Response: This text code Adopting Sidecar Containers | it means that the feature is enabled.

Context: Adopting Sidecar Containers | it means that the feature is enabled.


Prompt:
Explain this shell code:

kubectl get --raw /metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This shell code Adopting Sidecar Containers | For the individual node:


Prompt:
Explain this shell code:

kubectl get --raw /api/v1/nodes/<node-name>/proxy/metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This shell code Adopting Sidecar Containers | If you see something like this:


Prompt:
Explain this text code:

kubernetes_feature_enabled{name="SidecarContainers",stage="BETA"} 1

Response: This text code Adopting Sidecar Containers | it means that the feature is enabled.


Prompt:
Explain this bash code:

kubectl get --raw /metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This bash code Adopting Sidecar Containers | For the individual node:


Prompt:
Explain this bash code:

kubectl get --raw /api/v1/nodes/<node-name>/proxy/metrics | grep kubernetes_feature_enabled | grep SidecarContainers

Response: This bash code Adopting Sidecar Containers | If you see something like this:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:

Response:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]

Context: Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:

Response:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Explain this bash code:

kubectl apply -f pod-with-graceful-termination.yaml
kubectl apply -f explore-graceful-termination-nginx.yaml

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | Once the Pod and Service are running, you can get the name of any associated EndpointSlices:

Context: Explore Termination Behavior for Pods And Their Endpoints | Once the Pod and Service are running, you can get the name of any associated EndpointSlices:


Prompt:
Explain this text code:

NAME                  ADDRESSTYPE   PORTS   ENDPOINTS                 AGE
nginx-service-6tjbr   IPv4          80      10.12.1.199,10.12.1.201   22m

Response: This text code Explore Termination Behavior for Pods And Their Endpoints | You can see its status, and validate that there is one endpoint registered:

Context: Explore Termination Behavior for Pods And Their Endpoints | You can see its status, and validate that there is one endpoint registered:


Prompt:
Explain this bash code:

kubectl get endpointslices -o json -l kubernetes.io/service-name=nginx-service

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:

Context: Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Complete this json code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [

Response:
                "10.12.1.201"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false

Context: Explore Termination Behavior for Pods And Their Endpoints | Now let's terminate the Pod and validate that the Pod is being terminated respecting the graceful termination period configuration:


Prompt:
Explain this json code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false

Response: This json code Explore Termination Behavior for Pods And Their Endpoints | Now let's terminate the Pod and validate that the Pod is being terminated respecting the graceful termination period configuration:


Prompt:
Explain this bash code:

kubectl delete pod nginx-deployment-7768647bf9-b4b9s

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | All pods:

Context: Explore Termination Behavior for Pods And Their Endpoints | All pods:


Prompt:
Explain this text code:

NAME                                READY   STATUS        RESTARTS      AGE
nginx-deployment-7768647bf9-b4b9s   1/1     Terminating   0             4m1s
nginx-deployment-7768647bf9-rkxlw   1/1     Running       0             8s

Response: This text code Explore Termination Behavior for Pods And Their Endpoints | You can see that the new pod got scheduled.

Context: Explore Termination Behavior for Pods And Their Endpoints | You can see that the new pod got scheduled.


Prompt:
Explain this bash code:

kubectl get endpointslice -o json nginx-service-6tjbr

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Complete this json code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": false,
                "serving": true,
                "terminating": true
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-b4b9s",
                "namespace": "default",
                "uid": "66fa831c-7eb2-407f-bd2c-f96dfe841478"

Response:
            },
            "zone": "us-central1-c"
        },
        {
            "addresses": [
                "10.12.1.202"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-rkxlw",
                "namespace": "default",
                "uid": "722b1cbe-dcd7-4ed4-8928-4a4d0e2bbe35"
            },
            "zone": "us-central1-c"

Context: Explore Termination Behavior for Pods And Their Endpoints | This allows applications to communicate their state during termination and clients (such as load balancers) to implement connection draining functionality. These clients may detect terminating endpoin


Prompt:
Explain this json code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": false,
                "serving": true,
                "terminating": true
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-b4b9s",
                "namespace": "default",
                "uid": "66fa831c-7eb2-407f-bd2c-f96dfe841478"
            },
            "zone": "us-central1-c"
        },
        {
            "addresses": [
                "10.12.1.202"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-rkxlw",
                "namespace": "default",
                "uid": "722b1cbe-dcd7-4ed4-8928-4a4d0e2bbe35"
            },
            "zone": "us-central1-c"

Response: This json code Explore Termination Behavior for Pods And Their Endpoints | This allows applications to communicate their state during termination and clients (such as load balancers) to implement connection draining functionality. These clients may detect terminating endpoin


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:

Response:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:

Response:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Explain this shell code:

kubectl apply -f pod-with-graceful-termination.yaml
kubectl apply -f explore-graceful-termination-nginx.yaml

Response: This shell code Explore Termination Behavior for Pods And Their Endpoints | Once the Pod and Service are running, you can get the name of any associated EndpointSlices:


Prompt:
Explain this none code:

NAME                  ADDRESSTYPE   PORTS   ENDPOINTS                 AGE
nginx-service-6tjbr   IPv4          80      10.12.1.199,10.12.1.201   22m

Response: This none code Explore Termination Behavior for Pods And Their Endpoints | You can see its status, and validate that there is one endpoint registered:


Prompt:
Explain this shell code:

kubectl get endpointslices -o json -l kubernetes.io/service-name=nginx-service

Response: This shell code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Complete this none code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [

Response:
                "10.12.1.201"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false


Prompt:
Explain this none code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false

Response: This none code Explore Termination Behavior for Pods And Their Endpoints | Now let's terminate the Pod and validate that the Pod is being terminated respecting the graceful termination period configuration:


Prompt:
Explain this shell code:

kubectl delete pod nginx-deployment-7768647bf9-b4b9s

Response: This shell code Explore Termination Behavior for Pods And Their Endpoints | All pods:


Prompt:
Explain this none code:

NAME                                READY   STATUS        RESTARTS      AGE
nginx-deployment-7768647bf9-b4b9s   1/1     Terminating   0             4m1s
nginx-deployment-7768647bf9-rkxlw   1/1     Running       0             8s

Response: This none code Explore Termination Behavior for Pods And Their Endpoints | You can see that the new pod got scheduled.


Prompt:
Explain this shell code:

kubectl get endpointslice -o json nginx-service-6tjbr

Response: This shell code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Complete this none code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": false,
                "serving": true,
                "terminating": true
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-b4b9s",
                "namespace": "default",
                "uid": "66fa831c-7eb2-407f-bd2c-f96dfe841478"

Response:
            },
            "zone": "us-central1-c"
        },
        {
            "addresses": [
                "10.12.1.202"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-rkxlw",
                "namespace": "default",
                "uid": "722b1cbe-dcd7-4ed4-8928-4a4d0e2bbe35"
            },
            "zone": "us-central1-c"


Prompt:
Explain this none code:

{
    "addressType": "IPv4",
    "apiVersion": "discovery.k8s.io/v1",
    "endpoints": [
        {
            "addresses": [
                "10.12.1.201"
            ],
            "conditions": {
                "ready": false,
                "serving": true,
                "terminating": true
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-b4b9s",
                "namespace": "default",
                "uid": "66fa831c-7eb2-407f-bd2c-f96dfe841478"
            },
            "zone": "us-central1-c"
        },
        {
            "addresses": [
                "10.12.1.202"
            ],
            "conditions": {
                "ready": true,
                "serving": true,
                "terminating": false
            },
            "nodeName": "gke-main-default-pool-dca1511c-d17b",
            "targetRef": {
                "kind": "Pod",
                "name": "nginx-deployment-7768647bf9-rkxlw",
                "namespace": "default",
                "uid": "722b1cbe-dcd7-4ed4-8928-4a4d0e2bbe35"
            },
            "zone": "us-central1-c"

Response: This none code Explore Termination Behavior for Pods And Their Endpoints | This allows applications to communicate their state during termination and clients (such as load balancers) to implement connection draining functionality. These clients may detect terminating endpoin


Prompt:
Complete this yaml code:

service/pod-with-graceful-termination.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx

Response:
    spec:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]


Prompt:
Explain this yaml code:

service/pod-with-graceful-termination.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:

Response:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      terminationGracePeriodSeconds: 120 # extra long grace period
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80
        lifecycle:
          preStop:
            exec:
              # Real life termination may take any time up to terminationGracePeriodSeconds.
              # In this example - just hang around for at least the duration of terminationGracePeriodSeconds,
              # at 120 seconds container will be forcibly terminated.
              # Note, all this time nginx will keep processing requests.
              command: [
                "/bin/sh", "-c", "sleep 180"
              ]

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Complete this yaml code:

service/explore-graceful-termination-nginx.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:

Response:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80


Prompt:
Explain this yaml code:

service/explore-graceful-termination-nginx.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:

Response:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

Response: This yaml code Explore Termination Behavior for Pods And Their Endpoints | Now create the Deployment Pod and Service using the above files:


Prompt:
Explain this bash code:

kubectl apply -f pod-with-graceful-termination.yaml
kubectl apply -f explore-graceful-termination-nginx.yaml

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | Once the Pod and Service are running, you can get the name of any associated EndpointSlices:


Prompt:
Explain this bash code:

kubectl get endpointslices -o json -l kubernetes.io/service-name=nginx-service

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Explain this bash code:

kubectl delete pod nginx-deployment-7768647bf9-b4b9s

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | All pods:


Prompt:
Explain this bash code:

kubectl get endpointslice -o json nginx-service-6tjbr

Response: This bash code Explore Termination Behavior for Pods And Their Endpoints | The output is similar to this:


Prompt:
Explain this bash code:

kubectl get pod pod1
kubectl get pods pod1
kubectl get po pod1

Response: This bash code Command line tool (kubectl) | NAME: Specifies the name of the resource. Names are case-sensitive. If the name is omitted, details for all resources are displayed, for example kubectl get pods.

Context: Command line tool (kubectl) | NAME: Specifies the name of the resource. Names are case-sensitive. If the name is omitted, details for all resources are displayed, for example kubectl get pods.


Prompt:
Explain this bash code:

kubectl config set-context --current --namespace=<namespace-name>

Response: This bash code Command line tool (kubectl) | The following table includes short descriptions and the general syntax for all of the kubectl operations:

Context: Command line tool (kubectl) | The following table includes short descriptions and the general syntax for all of the kubectl operations:


Prompt:
Explain this bash code:

kubectl get pods <pod-name> -o custom-columns=NAME:.metadata.name,RSRC:.metadata.resourceVersion

Response: This bash code Command line tool (kubectl) | Template file:

Context: Command line tool (kubectl) | Template file:


Prompt:
Explain this bash code:

kubectl get pods <pod-name> -o custom-columns-file=template.txt

Response: This bash code Command line tool (kubectl) | where the template.txt file contains:

Context: Command line tool (kubectl) | where the template.txt file contains:


Prompt:
Explain this text code:

NAME          RSRC
metadata.name metadata.resourceVersion

Response: This text code Command line tool (kubectl) | The result of running either command is similar to:

Context: Command line tool (kubectl) | The result of running either command is similar to:


Prompt:
Explain this bash code:

kubectl [command] [TYPE] [NAME] --sort-by=<jsonpath_exp>

Response: This bash code Command line tool (kubectl) | To print a list of pods sorted by name, you run:

Context: Command line tool (kubectl) | To print a list of pods sorted by name, you run:


Prompt:
Complete this text code:

# Create a service using the definition in example-service.yaml.
kubectl apply -f example-service.yaml

# Create a replication controller using the definition in example-controller.yaml.

Response:
kubectl apply -f example-controller.yaml

# Create the objects that are defined in any .yaml, .yml, or .json file within the <directory> directory.
kubectl apply -f <directory>

Context: Command line tool (kubectl) | kubectl get - List one or more resources.


Prompt:
Explain this text code:

# Create a service using the definition in example-service.yaml.
kubectl apply -f example-service.yaml

# Create a replication controller using the definition in example-controller.yaml.
kubectl apply -f example-controller.yaml

# Create the objects that are defined in any .yaml, .yml, or .json file within the <directory> directory.
kubectl apply -f <directory>

Response: This text code Command line tool (kubectl) | kubectl get - List one or more resources.


Prompt:
Complete this text code:

# List all pods in plain-text output format.
kubectl get pods

# List all pods in plain-text output format and include additional information (such as node name).
kubectl get pods -o wide

# List the replication controller with the specified name in plain-text output format. Tip: You can shorten and replace the 'replicationcontroller' resource type with the alias 'rc'.
kubectl get replicationcontroller <rc-name>

Response:
# List all replication controllers and services together in plain-text output format.
kubectl get rc,services

# List all daemon sets in plain-text output format.
kubectl get ds

# List all pods running on node server01
kubectl get pods --field-selector=spec.nodeName=server01

Context: Command line tool (kubectl) | kubectl describe - Display detailed state of one or more resources, including the uninitialized ones by default.


Prompt:
Explain this text code:

# List all pods in plain-text output format.
kubectl get pods

# List all pods in plain-text output format and include additional information (such as node name).
kubectl get pods -o wide

# List the replication controller with the specified name in plain-text output format. Tip: You can shorten and replace the 'replicationcontroller' resource type with the alias 'rc'.
kubectl get replicationcontroller <rc-name>

# List all replication controllers and services together in plain-text output format.
kubectl get rc,services

# List all daemon sets in plain-text output format.
kubectl get ds

# List all pods running on node server01
kubectl get pods --field-selector=spec.nodeName=server01

Response: This text code Command line tool (kubectl) | kubectl describe - Display detailed state of one or more resources, including the uninitialized ones by default.


Prompt:
Complete this text code:

# Display the details of the node with name <node-name>.
kubectl describe nodes <node-name>

# Display the details of the pod with name <pod-name>.
kubectl describe pods/<pod-name>

Response:
# Display the details of all the pods that are managed by the replication controller named <rc-name>.
# Remember: Any pods that are created by the replication controller get prefixed with the name of the replication controller.
kubectl describe pods <rc-name>

# Describe all pods
kubectl describe pods

Context: Command line tool (kubectl) | kubectl delete - Delete resources either from a file, stdin, or specifying label selectors, names, resource selectors, or resources.


Prompt:
Explain this text code:

# Display the details of the node with name <node-name>.
kubectl describe nodes <node-name>

# Display the details of the pod with name <pod-name>.
kubectl describe pods/<pod-name>

# Display the details of all the pods that are managed by the replication controller named <rc-name>.
# Remember: Any pods that are created by the replication controller get prefixed with the name of the replication controller.
kubectl describe pods <rc-name>

# Describe all pods
kubectl describe pods

Response: This text code Command line tool (kubectl) | kubectl delete - Delete resources either from a file, stdin, or specifying label selectors, names, resource selectors, or resources.


Prompt:
Complete this text code:

# Delete a pod using the type and name specified in the pod.yaml file.
kubectl delete -f pod.yaml

# Delete all the pods and services that have the label '<label-key>=<label-value>'.

Response:
kubectl delete pods,services -l <label-key>=<label-value>

# Delete all pods, including uninitialized ones.
kubectl delete pods --all

Context: Command line tool (kubectl) | kubectl exec - Execute a command against a container in a pod.


Prompt:
Explain this text code:

# Delete a pod using the type and name specified in the pod.yaml file.
kubectl delete -f pod.yaml

# Delete all the pods and services that have the label '<label-key>=<label-value>'.
kubectl delete pods,services -l <label-key>=<label-value>

# Delete all pods, including uninitialized ones.
kubectl delete pods --all

Response: This text code Command line tool (kubectl) | kubectl exec - Execute a command against a container in a pod.


Prompt:
Complete this text code:

# Get output from running 'date' from pod <pod-name>. By default, output is from the first container.
kubectl exec <pod-name> -- date

# Get output from running 'date' in container <container-name> of pod <pod-name>.

Response:
kubectl exec <pod-name> -c <container-name> -- date

# Get an interactive TTY and run /bin/bash from pod <pod-name>. By default, output is from the first container.
kubectl exec -ti <pod-name> -- /bin/bash

Context: Command line tool (kubectl) | kubectl logs - Print the logs for a container in a pod.


Prompt:
Explain this text code:

# Get output from running 'date' from pod <pod-name>. By default, output is from the first container.
kubectl exec <pod-name> -- date

# Get output from running 'date' in container <container-name> of pod <pod-name>.
kubectl exec <pod-name> -c <container-name> -- date

# Get an interactive TTY and run /bin/bash from pod <pod-name>. By default, output is from the first container.
kubectl exec -ti <pod-name> -- /bin/bash

Response: This text code Command line tool (kubectl) | kubectl logs - Print the logs for a container in a pod.


Prompt:
Complete this text code:

# Return a snapshot of the logs from pod <pod-name>.
kubectl logs <pod-name>

Response:
# Start streaming the logs from pod <pod-name>. This is similar to the 'tail -f' Linux command.
kubectl logs -f <pod-name>

Context: Command line tool (kubectl) | kubectl diff - View a diff of the proposed updates to a cluster.


Prompt:
Explain this text code:

# Return a snapshot of the logs from pod <pod-name>.
kubectl logs <pod-name>

# Start streaming the logs from pod <pod-name>. This is similar to the 'tail -f' Linux command.
kubectl logs -f <pod-name>

Response: This text code Command line tool (kubectl) | kubectl diff - View a diff of the proposed updates to a cluster.


Prompt:
Complete this text code:

# Diff resources included in "pod.json".
kubectl diff -f pod.json

Response:
# Diff file read from stdin.
cat service.yaml | kubectl diff -f -

Context: Command line tool (kubectl) | Use the following set of examples to help you familiarize yourself with writing and using kubectl plugins:


Prompt:
Explain this text code:

# Diff resources included in "pod.json".
kubectl diff -f pod.json

# Diff file read from stdin.
cat service.yaml | kubectl diff -f -

Response: This text code Command line tool (kubectl) | Use the following set of examples to help you familiarize yourself with writing and using kubectl plugins:


Prompt:
Explain this text code:

# create a simple plugin in any language and name the resulting executable file
# so that it begins with the prefix "kubectl-"
cat ./kubectl-hello

Response: This text code Command line tool (kubectl) | With a plugin written, let's make it executable:

Context: Command line tool (kubectl) | With a plugin written, let's make it executable:


Prompt:
Complete this text code:

#!/bin/sh

Response:
# this plugin prints the words "hello world"
echo "hello world"


Prompt:
Explain this text code:

#!/bin/sh

# this plugin prints the words "hello world"
echo "hello world"

Response: This text code Command line tool (kubectl) | With a plugin written, let's make it executable:


Prompt:
Complete this text code:

chmod a+x ./kubectl-hello

# and move it to a location in our PATH
sudo mv ./kubectl-hello /usr/local/bin

Response:
sudo chown root:root /usr/local/bin

# You have now created and "installed" a kubectl plugin.
# You can begin using this plugin by invoking it from kubectl as if it were a regular command
kubectl hello

Context: Command line tool (kubectl) | In order to view all of the plugins that are available to kubectl, use the kubectl plugin list subcommand:


Prompt:
Explain this text code:

chmod a+x ./kubectl-hello

# and move it to a location in our PATH
sudo mv ./kubectl-hello /usr/local/bin
sudo chown root:root /usr/local/bin

# You have now created and "installed" a kubectl plugin.
# You can begin using this plugin by invoking it from kubectl as if it were a regular command
kubectl hello

Response: This text code Command line tool (kubectl) | In order to view all of the plugins that are available to kubectl, use the kubectl plugin list subcommand:


Prompt:
Explain this text code:

# You can "uninstall" a plugin, by removing it from the folder in your
# $PATH where you placed it
sudo rm /usr/local/bin/kubectl-hello

Response: This text code Command line tool (kubectl) | In order to view all of the plugins that are available to kubectl, use the kubectl plugin list subcommand:


Prompt:
Complete this text code:

The following kubectl-compatible plugins are available:

Response:
/usr/local/bin/kubectl-hello
/usr/local/bin/kubectl-foo
/usr/local/bin/kubectl-bar

Context: Command line tool (kubectl) | kubectl plugin list also warns you about plugins that are not executable, or that are shadowed by other plugins; for example:


Prompt:
Explain this text code:

The following kubectl-compatible plugins are available:

/usr/local/bin/kubectl-hello
/usr/local/bin/kubectl-foo
/usr/local/bin/kubectl-bar

Response: This text code Command line tool (kubectl) | kubectl plugin list also warns you about plugins that are not executable, or that are shadowed by other plugins; for example:


Prompt:
Explain this text code:

sudo chmod -x /usr/local/bin/kubectl-foo # remove execute permission
kubectl plugin list

Response: This text code Command line tool (kubectl) | You can think of plugins as a means to build more complex functionality on top of the existing kubectl commands:

Context: Command line tool (kubectl) | You can think of plugins as a means to build more complex functionality on top of the existing kubectl commands: