Prompt:
Explain this bash code:

kubectl get -f https://k8s.io/examples/application/simple_deployment.yaml -o yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | The output shows that the kubectl.kubernetes.io/last-applied-configuration annotation was written to the live configuration, and it matches the configuration file:

Context: Declarative Management of Kubernetes Objects Using Configuration Files | The output shows that the kubectl.kubernetes.io/last-applied-configuration annotation was written to the live configuration, and it matches the configuration file:


Prompt:
Complete this yaml code:

kind: Deployment
metadata:
  annotations:
    # ...
    # This is the json representation of simple_deployment.yaml
    # It was written by kubectl apply when the object was created
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:

Response:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | You can also use kubectl apply to update all objects defined in a directory, even if those objects already exist. This approach accomplishes the following:


Prompt:
Explain this yaml code:

kind: Deployment
metadata:
  annotations:
    # ...
    # This is the json representation of simple_deployment.yaml
    # It was written by kubectl apply when the object was created
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | You can also use kubectl apply to update all objects defined in a directory, even if those objects already exist. This approach accomplishes the following:


Prompt:
Explain this bash code:

kubectl diff -f <directory>
kubectl apply -f <directory>

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Here's an example configuration file:

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Here's an example configuration file:


Prompt:
Complete this yaml code:

application/simple_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Create the object using kubectl apply:


Prompt:
Explain this yaml code:

application/simple_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Create the object using kubectl apply:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Create the object using kubectl apply:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/application/simple_deployment.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Print the live configuration using kubectl get:

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Print the live configuration using kubectl get:


Prompt:
Explain this bash code:

kubectl get -f https://k8s.io/examples/application/simple_deployment.yaml -o yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | The output shows that the kubectl.kubernetes.io/last-applied-configuration annotation was written to the live configuration, and it matches the configuration file:


Prompt:
Complete this yaml code:

kind: Deployment
metadata:
  annotations:
    # ...
    # This is the json representation of simple_deployment.yaml
    # It was written by kubectl apply when the object was created
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:

Response:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Directly update the replicas field in the live configuration by using kubectl scale. This does not use kubectl apply:


Prompt:
Explain this yaml code:

kind: Deployment
metadata:
  annotations:
    # ...
    # This is the json representation of simple_deployment.yaml
    # It was written by kubectl apply when the object was created
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Directly update the replicas field in the live configuration by using kubectl scale. This does not use kubectl apply:


Prompt:
Explain this bash code:

kubectl scale deployment/nginx-deployment --replicas=2

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Print the live configuration using kubectl get:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # note that the annotation does not contain replicas
    # because it was not updated through apply
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  replicas: 2 # written by scale
  # ...

Response:
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
      # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Update the simple_deployment.yaml configuration file to change the image from nginx:1.14.2 to nginx:1.16.1, and delete the minReadySeconds field:


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # note that the annotation does not contain replicas
    # because it was not updated through apply
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  replicas: 2 # written by scale
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
      # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Update the simple_deployment.yaml configuration file to change the image from nginx:1.14.2 to nginx:1.16.1, and delete the minReadySeconds field:


Prompt:
Complete this yaml code:

application/update_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Apply the changes made to the configuration file:


Prompt:
Explain this yaml code:

application/update_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Apply the changes made to the configuration file:


Prompt:
Complete this yaml code:

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

Response:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Apply the changes made to the configuration file:


Prompt:
Explain this bash code:

kubectl diff -f https://k8s.io/examples/application/update_deployment.yaml
kubectl apply -f https://k8s.io/examples/application/update_deployment.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Print the live configuration using kubectl get:


Prompt:
Explain this bash code:

kubectl get -f https://k8s.io/examples/application/update_deployment.yaml -o yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | The output shows the following changes to the live configuration:

Context: Declarative Management of Kubernetes Objects Using Configuration Files | The output shows the following changes to the live configuration:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # The annotation contains the updated image to nginx 1.16.1,
    # but does not contain the updated replicas to 2
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.16.1","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
    # ...
spec:
  replicas: 2 # Set by `kubectl scale`.  Ignored by `kubectl apply`.
  # minReadySeconds cleared by `kubectl apply`
  # ...
  selector:

Response:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.16.1 # Set by `kubectl apply`
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | There are two approaches to delete objects managed by kubectl apply.


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # The annotation contains the updated image to nginx 1.16.1,
    # but does not contain the updated replicas to 2
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.16.1","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
    # ...
spec:
  replicas: 2 # Set by `kubectl scale`.  Ignored by `kubectl apply`.
  # minReadySeconds cleared by `kubectl apply`
  # ...
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.16.1 # Set by `kubectl apply`
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | There are two approaches to delete objects managed by kubectl apply.


Prompt:
Explain this bash code:

kubectl apply -f <directory> --prune -l <labels> --prune-allowlist=<gvk-list>

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | FEATURE STATE: Kubernetes v1.27 [alpha]Caution:kubectl apply --prune --applyset is in alpha, and backwards incompatible changes might be introduced in subsequent releases.To use ApplySet-based pruning

Context: Declarative Management of Kubernetes Objects Using Configuration Files | FEATURE STATE: Kubernetes v1.27 [alpha]Caution:kubectl apply --prune --applyset is in alpha, and backwards incompatible changes might be introduced in subsequent releases.To use ApplySet-based pruning


Prompt:
Explain this text code:

KUBECTL_APPLYSET=true kubectl apply -f <directory> --prune --applyset=<name>

Response: This text code Declarative Management of Kubernetes Objects Using Configuration Files | By default, the type of the ApplySet parent object used is a Secret. However, ConfigMaps can also be used in the format: --applyset=configmaps/<name>. When using a Secret or ConfigMap, kubectl will cr

Context: Declarative Management of Kubernetes Objects Using Configuration Files | By default, the type of the ApplySet parent object used is a Secret. However, ConfigMaps can also be used in the format: --applyset=configmaps/<name>. When using a Secret or ConfigMap, kubectl will cr


Prompt:
Complete this yaml code:

application/update_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Also, suppose this is the live configuration for the same Deployment object:


Prompt:
Explain this yaml code:

application/update_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Also, suppose this is the live configuration for the same Deployment object:


Prompt:
Complete this yaml code:

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

Response:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.16.1 # update the image
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Also, suppose this is the live configuration for the same Deployment object:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # note that the annotation does not contain replicas
    # because it was not updated through apply
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  replicas: 2 # written by scale
  # ...

Response:
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
      # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Here are the merge calculations that would be performed by kubectl apply:


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # note that the annotation does not contain replicas
    # because it was not updated through apply
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"minReadySeconds":5,"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
  # ...
spec:
  replicas: 2 # written by scale
  # ...
  minReadySeconds: 5
  selector:
    matchLabels:
      # ...
      app: nginx
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        # ...
        name: nginx
        ports:
        - containerPort: 80
      # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Here are the merge calculations that would be performed by kubectl apply:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # The annotation contains the updated image to nginx 1.16.1,
    # but does not contain the updated replicas to 2
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.16.1","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
    # ...
spec:
  selector:
    matchLabels:
      # ...
      app: nginx

Response:
  replicas: 2 # Set by `kubectl scale`.  Ignored by `kubectl apply`.
  # minReadySeconds cleared by `kubectl apply`
  # ...
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.16.1 # Set by `kubectl apply`
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | How a particular field in a configuration file is merged with the live configuration depends on the type of the field. There are several types of fields:


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    # ...
    # The annotation contains the updated image to nginx 1.16.1,
    # but does not contain the updated replicas to 2
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment",
      "metadata":{"annotations":{},"name":"nginx-deployment","namespace":"default"},
      "spec":{"selector":{"matchLabels":{"app":nginx}},"template":{"metadata":{"labels":{"app":"nginx"}},
      "spec":{"containers":[{"image":"nginx:1.16.1","name":"nginx",
      "ports":[{"containerPort":80}]}]}}}}
    # ...
spec:
  selector:
    matchLabels:
      # ...
      app: nginx
  replicas: 2 # Set by `kubectl scale`.  Ignored by `kubectl apply`.
  # minReadySeconds cleared by `kubectl apply`
  # ...
  template:
    metadata:
      # ...
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.16.1 # Set by `kubectl apply`
        # ...
        name: nginx
        ports:
        - containerPort: 80
        # ...
      # ...
    # ...
  # ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | How a particular field in a configuration file is merged with the live configuration depends on the type of the field. There are several types of fields:


Prompt:
Complete this text code:

# last-applied-configuration value
    args: ["a", "b"]

# configuration file value
    args: ["a", "c"]

Response:
# live configuration
    args: ["a", "b", "d"]

# result after merge
    args: ["a", "c"]

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Explanation: The merge used the configuration file value as the new list value.


Prompt:
Explain this text code:

# last-applied-configuration value
    args: ["a", "b"]

# configuration file value
    args: ["a", "c"]

# live configuration
    args: ["a", "b", "d"]

# result after merge
    args: ["a", "c"]

Response: This text code Declarative Management of Kubernetes Objects Using Configuration Files | Explanation: The merge used the configuration file value as the new list value.


Prompt:
Complete this text code:

# last-applied-configuration value
    containers:
    - name: nginx
      image: nginx:1.16
    - name: nginx-helper-a # key: nginx-helper-a; will be deleted in result
      image: helper:1.3
    - name: nginx-helper-b # key: nginx-helper-b; will be retained
      image: helper:1.3

# configuration file value
    containers:
    - name: nginx
      image: nginx:1.16
    - name: nginx-helper-b
      image: helper:1.3
    - name: nginx-helper-c # key: nginx-helper-c; will be added in result
      image: helper:1.3

# live configuration
    containers:
    - name: nginx

Response:
      image: nginx:1.16
    - name: nginx-helper-a
      image: helper:1.3
    - name: nginx-helper-b
      image: helper:1.3
      args: ["run"] # Field will be retained
    - name: nginx-helper-d # key: nginx-helper-d; will be retained
      image: helper:1.3

# result after merge
    containers:
    - name: nginx
      image: nginx:1.16
      # Element nginx-helper-a was deleted
    - name: nginx-helper-b
      image: helper:1.3
      args: ["run"] # Field was retained
    - name: nginx-helper-c # Element was added
      image: helper:1.3
    - name: nginx-helper-d # Element was ignored
      image: helper:1.3

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Explanation:


Prompt:
Explain this text code:

# last-applied-configuration value
    containers:
    - name: nginx
      image: nginx:1.16
    - name: nginx-helper-a # key: nginx-helper-a; will be deleted in result
      image: helper:1.3
    - name: nginx-helper-b # key: nginx-helper-b; will be retained
      image: helper:1.3

# configuration file value
    containers:
    - name: nginx
      image: nginx:1.16
    - name: nginx-helper-b
      image: helper:1.3
    - name: nginx-helper-c # key: nginx-helper-c; will be added in result
      image: helper:1.3

# live configuration
    containers:
    - name: nginx
      image: nginx:1.16
    - name: nginx-helper-a
      image: helper:1.3
    - name: nginx-helper-b
      image: helper:1.3
      args: ["run"] # Field will be retained
    - name: nginx-helper-d # key: nginx-helper-d; will be retained
      image: helper:1.3

# result after merge
    containers:
    - name: nginx
      image: nginx:1.16
      # Element nginx-helper-a was deleted
    - name: nginx-helper-b
      image: helper:1.3
      args: ["run"] # Field was retained
    - name: nginx-helper-c # Element was added
      image: helper:1.3
    - name: nginx-helper-d # Element was ignored
      image: helper:1.3

Response: This text code Declarative Management of Kubernetes Objects Using Configuration Files | Explanation:


Prompt:
Complete this yaml code:

application/simple_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

application/simple_deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Create the object using kubectl apply:


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5

Response:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | Create the object using kubectl apply:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/application/simple_deployment.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Print the live configuration using kubectl get:


Prompt:
Explain this bash code:

kubectl get -f https://k8s.io/examples/application/simple_deployment.yaml -o yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | The output shows that the API server set several fields to default values in the live configuration. These fields were not specified in the configuration file.

Context: Declarative Management of Kubernetes Objects Using Configuration Files | The output shows that the API server set several fields to default values in the live configuration. These fields were not specified in the configuration file.


Prompt:
Complete this yaml code:

apiVersion: apps/v1
kind: Deployment
# ...
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  replicas: 1 # defaulted by apiserver
  strategy:
    rollingUpdate: # defaulted by apiserver - derived from strategy.type
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate # defaulted by apiserver
  template:
    metadata:
      creationTimestamp: null

Response:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        imagePullPolicy: IfNotPresent # defaulted by apiserver
        name: nginx
        ports:
        - containerPort: 80
          protocol: TCP # defaulted by apiserver
        resources: {} # defaulted by apiserver
        terminationMessagePath: /dev/termination-log # defaulted by apiserver
      dnsPolicy: ClusterFirst # defaulted by apiserver
      restartPolicy: Always # defaulted by apiserver
      securityContext: {} # defaulted by apiserver
      terminationGracePeriodSeconds: 30 # defaulted by apiserver
# ...

Context: Declarative Management of Kubernetes Objects Using Configuration Files | In a patch request, defaulted fields are not re-defaulted unless they are explicitly cleared as part of a patch request. This can cause unexpected behavior for fields that are defaulted based on the v


Prompt:
Explain this yaml code:

apiVersion: apps/v1
kind: Deployment
# ...
spec:
  selector:
    matchLabels:
      app: nginx
  minReadySeconds: 5
  replicas: 1 # defaulted by apiserver
  strategy:
    rollingUpdate: # defaulted by apiserver - derived from strategy.type
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate # defaulted by apiserver
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:1.14.2
        imagePullPolicy: IfNotPresent # defaulted by apiserver
        name: nginx
        ports:
        - containerPort: 80
          protocol: TCP # defaulted by apiserver
        resources: {} # defaulted by apiserver
        terminationMessagePath: /dev/termination-log # defaulted by apiserver
      dnsPolicy: ClusterFirst # defaulted by apiserver
      restartPolicy: Always # defaulted by apiserver
      securityContext: {} # defaulted by apiserver
      terminationGracePeriodSeconds: 30 # defaulted by apiserver
# ...

Response: This yaml code Declarative Management of Kubernetes Objects Using Configuration Files | In a patch request, defaulted fields are not re-defaulted unless they are explicitly cleared as part of a patch request. This can cause unexpected behavior for fields that are defaulted based on the v


Prompt:
Complete this text code:

# last-applied-configuration
spec:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# configuration file
spec:
  strategy:
    type: Recreate # updated value
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# live configuration
spec:
  strategy:

Response:
    type: RollingUpdate # defaulted value
    rollingUpdate: # defaulted value derived from type
      maxSurge : 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# result after merge - ERROR!
spec:
  strategy:
    type: Recreate # updated value: incompatible with rollingUpdate
    rollingUpdate: # defaulted value: incompatible with "type: Recreate"
      maxSurge : 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80


Prompt:
Explain this text code:

# last-applied-configuration
spec:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# configuration file
spec:
  strategy:
    type: Recreate # updated value
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# live configuration
spec:
  strategy:
    type: RollingUpdate # defaulted value
    rollingUpdate: # defaulted value derived from type
      maxSurge : 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

# result after merge - ERROR!
spec:
  strategy:
    type: Recreate # updated value: incompatible with rollingUpdate
    rollingUpdate: # defaulted value: incompatible with "type: Recreate"
      maxSurge : 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.14.2
        ports:
        - containerPort: 80

Response: This text code Declarative Management of Kubernetes Objects Using Configuration Files | Explanation:


Prompt:
Explain this bash code:

kubectl get <kind>/<name> -o yaml > <kind>_<name>.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Manually remove the status field from the configuration file.

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Manually remove the status field from the configuration file.


Prompt:
Explain this bash code:

kubectl replace --save-config -f <kind>_<name>.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Change processes to use kubectl apply for managing the object exclusively.

Context: Declarative Management of Kubernetes Objects Using Configuration Files | Change processes to use kubectl apply for managing the object exclusively.


Prompt:
Explain this bash code:

kubectl replace --save-config -f <kind>_<name>.yaml

Response: This bash code Declarative Management of Kubernetes Objects Using Configuration Files | Change processes to use kubectl apply for managing the object exclusively.


Prompt:
Complete this text code:

selector:
  matchLabels:
      controller-selector: "apps/v1/deployment/nginx"

Response:
template:
  metadata:
    labels:
      controller-selector: "apps/v1/deployment/nginx"

Context: Declarative Management of Kubernetes Objects Using Configuration Files |


Prompt:
Explain this text code:

selector:
  matchLabels:
      controller-selector: "apps/v1/deployment/nginx"
template:
  metadata:
    labels:
      controller-selector: "apps/v1/deployment/nginx"

Response: This text code Declarative Management of Kubernetes Objects Using Configuration Files |


Prompt:
Complete this text code:

/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/etcd/ca.crt

Response:
/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-ca.key

Context: PKI certificates and requirements | If you don't wish to copy the CA private keys to your cluster, you can generate all certificates yourself.


Prompt:
Explain this text code:

/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-ca.key

Response: This text code PKI certificates and requirements | If you don't wish to copy the CA private keys to your cluster, you can generate all certificates yourself.


Prompt:
Complete this text code:

/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/apiserver-etcd-client.key
/etc/kubernetes/pki/apiserver-etcd-client.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/apiserver.key
/etc/kubernetes/pki/apiserver.crt
/etc/kubernetes/pki/apiserver-kubelet-client.key
/etc/kubernetes/pki/apiserver-kubelet-client.crt
/etc/kubernetes/pki/front-proxy-ca.key

Response:
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-client.key
/etc/kubernetes/pki/front-proxy-client.crt
/etc/kubernetes/pki/etcd/server.key
/etc/kubernetes/pki/etcd/server.crt
/etc/kubernetes/pki/etcd/peer.key
/etc/kubernetes/pki/etcd/peer.crt
/etc/kubernetes/pki/etcd/healthcheck-client.key
/etc/kubernetes/pki/etcd/healthcheck-client.crt
/etc/kubernetes/pki/sa.key
/etc/kubernetes/pki/sa.pub

Context: PKI certificates and requirements | You must manually configure these administrator accounts and service accounts:


Prompt:
Explain this text code:

/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/apiserver-etcd-client.key
/etc/kubernetes/pki/apiserver-etcd-client.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/apiserver.key
/etc/kubernetes/pki/apiserver.crt
/etc/kubernetes/pki/apiserver-kubelet-client.key
/etc/kubernetes/pki/apiserver-kubelet-client.crt
/etc/kubernetes/pki/front-proxy-ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-client.key
/etc/kubernetes/pki/front-proxy-client.crt
/etc/kubernetes/pki/etcd/server.key
/etc/kubernetes/pki/etcd/server.crt
/etc/kubernetes/pki/etcd/peer.key
/etc/kubernetes/pki/etcd/peer.crt
/etc/kubernetes/pki/etcd/healthcheck-client.key
/etc/kubernetes/pki/etcd/healthcheck-client.crt
/etc/kubernetes/pki/sa.key
/etc/kubernetes/pki/sa.pub

Response: This text code PKI certificates and requirements | You must manually configure these administrator accounts and service accounts:


Prompt:
Complete this text code:

KUBECONFIG=<filename> kubectl config set-cluster default-cluster --server=https://<host ip>:6443 --certificate-authority <path-to-kubernetes-ca> --embed-certs
KUBECONFIG=<filename> kubectl config set-credentials <credential-name> --client-key <path-to-key>.pem --client-certificate <path-to-cert>.pem --embed-certs

Response:
KUBECONFIG=<filename> kubectl config set-context default-system --cluster default-cluster --user <credential-name>
KUBECONFIG=<filename> kubectl config use-context default-system

Context: PKI certificates and requirements | These files are used as follows:


Prompt:
Explain this text code:

KUBECONFIG=<filename> kubectl config set-cluster default-cluster --server=https://<host ip>:6443 --certificate-authority <path-to-kubernetes-ca> --embed-certs
KUBECONFIG=<filename> kubectl config set-credentials <credential-name> --client-key <path-to-key>.pem --client-certificate <path-to-cert>.pem --embed-certs
KUBECONFIG=<filename> kubectl config set-context default-system --cluster default-cluster --user <credential-name>
KUBECONFIG=<filename> kubectl config use-context default-system

Response: This text code PKI certificates and requirements | These files are used as follows:


Prompt:
Complete this text code:

/etc/kubernetes/admin.conf
/etc/kubernetes/super-admin.conf

Response:
/etc/kubernetes/kubelet.conf
/etc/kubernetes/controller-manager.conf
/etc/kubernetes/scheduler.conf

Context: PKI certificates and requirements | any other IP or DNS name you contact your cluster on (as used by kubeadm the load balancer stable IP and/or DNS name, kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.clu


Prompt:
Explain this text code:

/etc/kubernetes/admin.conf
/etc/kubernetes/super-admin.conf
/etc/kubernetes/kubelet.conf
/etc/kubernetes/controller-manager.conf
/etc/kubernetes/scheduler.conf

Response: This text code PKI certificates and requirements | any other IP or DNS name you contact your cluster on (as used by kubeadm the load balancer stable IP and/or DNS name, kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.clu


Prompt:
Complete this text code:

/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/etcd/ca.crt

Response:
/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-ca.key


Prompt:
Explain this text code:

/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-ca.key

Response: This text code PKI certificates and requirements | If you don't wish to copy the CA private keys to your cluster, you can generate all certificates yourself.


Prompt:
Complete this text code:

/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/apiserver-etcd-client.key
/etc/kubernetes/pki/apiserver-etcd-client.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/apiserver.key
/etc/kubernetes/pki/apiserver.crt
/etc/kubernetes/pki/apiserver-kubelet-client.key
/etc/kubernetes/pki/apiserver-kubelet-client.crt
/etc/kubernetes/pki/front-proxy-ca.key

Response:
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-client.key
/etc/kubernetes/pki/front-proxy-client.crt
/etc/kubernetes/pki/etcd/server.key
/etc/kubernetes/pki/etcd/server.crt
/etc/kubernetes/pki/etcd/peer.key
/etc/kubernetes/pki/etcd/peer.crt
/etc/kubernetes/pki/etcd/healthcheck-client.key
/etc/kubernetes/pki/etcd/healthcheck-client.crt
/etc/kubernetes/pki/sa.key
/etc/kubernetes/pki/sa.pub


Prompt:
Explain this text code:

/etc/kubernetes/pki/etcd/ca.key
/etc/kubernetes/pki/etcd/ca.crt
/etc/kubernetes/pki/apiserver-etcd-client.key
/etc/kubernetes/pki/apiserver-etcd-client.crt
/etc/kubernetes/pki/ca.key
/etc/kubernetes/pki/ca.crt
/etc/kubernetes/pki/apiserver.key
/etc/kubernetes/pki/apiserver.crt
/etc/kubernetes/pki/apiserver-kubelet-client.key
/etc/kubernetes/pki/apiserver-kubelet-client.crt
/etc/kubernetes/pki/front-proxy-ca.key
/etc/kubernetes/pki/front-proxy-ca.crt
/etc/kubernetes/pki/front-proxy-client.key
/etc/kubernetes/pki/front-proxy-client.crt
/etc/kubernetes/pki/etcd/server.key
/etc/kubernetes/pki/etcd/server.crt
/etc/kubernetes/pki/etcd/peer.key
/etc/kubernetes/pki/etcd/peer.crt
/etc/kubernetes/pki/etcd/healthcheck-client.key
/etc/kubernetes/pki/etcd/healthcheck-client.crt
/etc/kubernetes/pki/sa.key
/etc/kubernetes/pki/sa.pub

Response: This text code PKI certificates and requirements | You must manually configure these administrator accounts and service accounts:


Prompt:
Explain this text code:

Subject: O = kubeadm:cluster-admins, CN = kubernetes-admin

Response: This text code PKI certificates and requirements | Another is in super-admin.conf that has Subject: O = system:masters, CN = kubernetes-super-admin. This file is generated only on the node where kubeadm init was called.

Context: PKI certificates and requirements | Another is in super-admin.conf that has Subject: O = system:masters, CN = kubernetes-super-admin. This file is generated only on the node where kubeadm init was called.


Prompt:
Explain this text code:

Subject: O = system:masters, CN = kubernetes-super-admin

Response: This text code PKI certificates and requirements | For each configuration, generate an x509 certificate/key pair with the given Common Name (CN) and Organization (O).

Context: PKI certificates and requirements | For each configuration, generate an x509 certificate/key pair with the given Common Name (CN) and Organization (O).


Prompt:
Complete this text code:

KUBECONFIG=<filename> kubectl config set-cluster default-cluster --server=https://<host ip>:6443 --certificate-authority <path-to-kubernetes-ca> --embed-certs
KUBECONFIG=<filename> kubectl config set-credentials <credential-name> --client-key <path-to-key>.pem --client-certificate <path-to-cert>.pem --embed-certs

Response:
KUBECONFIG=<filename> kubectl config set-context default-system --cluster default-cluster --user <credential-name>
KUBECONFIG=<filename> kubectl config use-context default-system


Prompt:
Explain this text code:

KUBECONFIG=<filename> kubectl config set-cluster default-cluster --server=https://<host ip>:6443 --certificate-authority <path-to-kubernetes-ca> --embed-certs
KUBECONFIG=<filename> kubectl config set-credentials <credential-name> --client-key <path-to-key>.pem --client-certificate <path-to-cert>.pem --embed-certs
KUBECONFIG=<filename> kubectl config set-context default-system --cluster default-cluster --user <credential-name>
KUBECONFIG=<filename> kubectl config use-context default-system

Response: This text code PKI certificates and requirements | These files are used as follows:


Prompt:
Complete this text code:

/etc/kubernetes/admin.conf
/etc/kubernetes/super-admin.conf

Response:
/etc/kubernetes/kubelet.conf
/etc/kubernetes/controller-manager.conf
/etc/kubernetes/scheduler.conf


Prompt:
Explain this text code:

/etc/kubernetes/admin.conf
/etc/kubernetes/super-admin.conf
/etc/kubernetes/kubelet.conf
/etc/kubernetes/controller-manager.conf
/etc/kubernetes/scheduler.conf

Response: This text code PKI certificates and requirements | any other IP or DNS name you contact your cluster on (as used by kubeadm the load balancer stable IP and/or DNS name, kubernetes, kubernetes.default, kubernetes.default.svc, kubernetes.default.svc.clu


Prompt:
Explain this text code:

sudo tee /etc/sysctl.d/k8s.conf <<EOF
net.ipv4.ip_forward = 1
EOF

Response: This text code Running Kubelet in Standalone Mode | Apply the changes to the system:

Context: Running Kubelet in Standalone Mode | Apply the changes to the system:


Prompt:
Complete this text code:

...
* Applying /etc/sysctl.d/k8s.conf ...

Response:
net.ipv4.ip_forward = 1
* Applying /etc/sysctl.conf ...

Context: Running Kubelet in Standalone Mode | Download the latest available versions of the required packages (recommended).


Prompt:
Explain this text code:

...
* Applying /etc/sysctl.d/k8s.conf ...
net.ipv4.ip_forward = 1
* Applying /etc/sysctl.conf ...

Response: This text code Running Kubelet in Standalone Mode | Download the latest available versions of the required packages (recommended).


Prompt:
Explain this text code:

curl https://raw.githubusercontent.com/cri-o/packaging/main/get > crio-install

Response: This text code Running Kubelet in Standalone Mode | Run the installer script:

Context: Running Kubelet in Standalone Mode | Run the installer script:


Prompt:
Explain this text code:

sudo systemctl daemon-reload
sudo systemctl enable --now crio.service

Response: This text code Running Kubelet in Standalone Mode | Quick test:

Context: Running Kubelet in Standalone Mode | Quick test:


Prompt:
Explain this text code:

CNI bridge plugin v1.5.1
CNI protocol versions supported: 0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.4.0, 1.0.0

Response: This text code Running Kubelet in Standalone Mode | To check the default configuration:

Context: Running Kubelet in Standalone Mode | To check the default configuration:


Prompt:
Complete this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {

Response:
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}

Context: Running Kubelet in Standalone Mode | Download the latest stable release of the kubelet.


Prompt:
Explain this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}

Response: This json code Running Kubelet in Standalone Mode | Download the latest stable release of the kubelet.


Prompt:
Explain this text code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubelet"

Response: This text code Running Kubelet in Standalone Mode | curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"

Context: Running Kubelet in Standalone Mode | curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"


Prompt:
Explain this text code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"

Response: This text code Running Kubelet in Standalone Mode | Configure:

Context: Running Kubelet in Standalone Mode | Configure:


Prompt:
Complete this yaml code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!

Response:
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF

Context: Running Kubelet in Standalone Mode | Because you are not setting up a production cluster, you are using plain HTTP (readOnlyPort: 10255) for unauthenticated queries to the kubelet's API.


Prompt:
Explain this yaml code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF

Response: This yaml code Running Kubelet in Standalone Mode | Because you are not setting up a production cluster, you are using plain HTTP (readOnlyPort: 10255) for unauthenticated queries to the kubelet's API.


Prompt:
Complete this text code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \

Response:
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF

Context: Running Kubelet in Standalone Mode | The command line argument --kubeconfig has been intentionally omitted in the service configuration file. This argument sets the path to a kubeconfig file that specifies how to connect to the API serve


Prompt:
Explain this text code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF

Response: This text code Running Kubelet in Standalone Mode | The command line argument --kubeconfig has been intentionally omitted in the service configuration file. This argument sets the path to a kubeconfig file that specifies how to connect to the API serve


Prompt:
Explain this text code:

sudo systemctl daemon-reload
sudo systemctl enable --now kubelet.service

Response: This text code Running Kubelet in Standalone Mode | Quick test:


Prompt:
Complete this json code:

[+]ping ok
[+]log ok

Response:
[+]syncloop ok
healthz check passed

Context: Running Kubelet in Standalone Mode | Query the kubelet's API /pods endpoint:


Prompt:
Explain this json code:

[+]ping ok
[+]log ok
[+]syncloop ok
healthz check passed

Response: This json code Running Kubelet in Standalone Mode | Query the kubelet's API /pods endpoint:


Prompt:
Complete this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",

Response:
  "metadata": {},
  "items": null
}

Context: Running Kubelet in Standalone Mode | In standalone mode, you can run Pods using Pod manifests. The manifests can either be on the local filesystem, or fetched via HTTP from a configuration source.


Prompt:
Explain this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",
  "metadata": {},
  "items": null
}

Response: This json code Running Kubelet in Standalone Mode | In standalone mode, you can run Pods using Pod manifests. The manifests can either be on the local filesystem, or fetched via HTTP from a configuration source.


Prompt:
Complete this yaml code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:

Response:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF

Context: Running Kubelet in Standalone Mode | Copy the static-web.yaml manifest file to the /etc/kubernetes/manifests directory.


Prompt:
Explain this yaml code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF

Response: This yaml code Running Kubelet in Standalone Mode | Copy the static-web.yaml manifest file to the /etc/kubernetes/manifests directory.


Prompt:
Explain this text code:

curl http://localhost:10255/pods | jq '.items[].status.podIP'

Response: This text code Running Kubelet in Standalone Mode | The output is similar to:

Context: Running Kubelet in Standalone Mode | The output is similar to:


Prompt:
Complete this text code:

<!DOCTYPE html>
<html>

Response:
<head>
<title>Welcome to nginx!</title>
...

Context: Running Kubelet in Standalone Mode | If you need to diagnose a problem getting this tutorial to work, you can look within the following directories for monitoring and troubleshooting:


Prompt:
Explain this text code:

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
...

Response: This text code Running Kubelet in Standalone Mode | If you need to diagnose a problem getting this tutorial to work, you can look within the following directories for monitoring and troubleshooting:


Prompt:
Complete this text code:

/var/lib/cni
/var/lib/containers
/var/lib/kubelet

Response:
/var/log/containers
/var/log/pods

Context: Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this text code:

/var/lib/cni
/var/lib/containers
/var/lib/kubelet

/var/log/containers
/var/log/pods

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Complete this text code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet

Response:
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods


Prompt:
Explain this text code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Complete this text code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib

Response:
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers


Prompt:
Explain this text code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this text code:

sudo rm -rf /opt/cni
sudo rm -rf /etc/cni
sudo rm -rf /var/lib/cni

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this shell code:

sudo tee /etc/sysctl.d/k8s.conf <<EOF
net.ipv4.ip_forward = 1
EOF

Response: This shell code Running Kubelet in Standalone Mode | Apply the changes to the system:


Prompt:
Complete this text code:

...
* Applying /etc/sysctl.d/k8s.conf ...

Response:
net.ipv4.ip_forward = 1
* Applying /etc/sysctl.conf ...


Prompt:
Explain this text code:

...
* Applying /etc/sysctl.d/k8s.conf ...
net.ipv4.ip_forward = 1
* Applying /etc/sysctl.conf ...

Response: This text code Running Kubelet in Standalone Mode | Download the latest available versions of the required packages (recommended).


Prompt:
Explain this shell code:

curl https://raw.githubusercontent.com/cri-o/packaging/main/get > crio-install

Response: This shell code Running Kubelet in Standalone Mode | Run the installer script:


Prompt:
Explain this shell code:

sudo systemctl daemon-reload
sudo systemctl enable --now crio.service

Response: This shell code Running Kubelet in Standalone Mode | Quick test:


Prompt:
Explain this text code:

CNI bridge plugin v1.5.1
CNI protocol versions supported: 0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.4.0, 1.0.0

Response: This text code Running Kubelet in Standalone Mode | To check the default configuration:


Prompt:
Complete this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {

Response:
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}


Prompt:
Explain this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}

Response: This json code Running Kubelet in Standalone Mode | Download the latest stable release of the kubelet.


Prompt:
Explain this bash code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubelet"

Response: This bash code Running Kubelet in Standalone Mode | curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"


Prompt:
Explain this bash code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"

Response: This bash code Running Kubelet in Standalone Mode | Configure:


Prompt:
Complete this shell code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!

Response:
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF


Prompt:
Explain this shell code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF

Response: This shell code Running Kubelet in Standalone Mode | Because you are not setting up a production cluster, you are using plain HTTP (readOnlyPort: 10255) for unauthenticated queries to the kubelet's API.


Prompt:
Complete this shell code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \

Response:
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF


Prompt:
Explain this shell code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF

Response: This shell code Running Kubelet in Standalone Mode | The command line argument --kubeconfig has been intentionally omitted in the service configuration file. This argument sets the path to a kubeconfig file that specifies how to connect to the API serve


Prompt:
Explain this shell code:

sudo systemctl daemon-reload
sudo systemctl enable --now kubelet.service

Response: This shell code Running Kubelet in Standalone Mode | Quick test:


Prompt:
Complete this json code:

[+]ping ok
[+]log ok

Response:
[+]syncloop ok
healthz check passed


Prompt:
Explain this json code:

[+]ping ok
[+]log ok
[+]syncloop ok
healthz check passed

Response: This json code Running Kubelet in Standalone Mode | Query the kubelet's API /pods endpoint:


Prompt:
Complete this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",

Response:
  "metadata": {},
  "items": null
}


Prompt:
Explain this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",
  "metadata": {},
  "items": null
}

Response: This json code Running Kubelet in Standalone Mode | In standalone mode, you can run Pods using Pod manifests. The manifests can either be on the local filesystem, or fetched via HTTP from a configuration source.


Prompt:
Complete this shell code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:

Response:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF


Prompt:
Explain this shell code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF

Response: This shell code Running Kubelet in Standalone Mode | Copy the static-web.yaml manifest file to the /etc/kubernetes/manifests directory.


Prompt:
Explain this shell code:

curl http://localhost:10255/pods | jq '.items[].status.podIP'

Response: This shell code Running Kubelet in Standalone Mode | The output is similar to:


Prompt:
Complete this html code:

<!DOCTYPE html>
<html>

Response:
<head>
<title>Welcome to nginx!</title>
...


Prompt:
Explain this html code:

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
...

Response: This html code Running Kubelet in Standalone Mode | If you need to diagnose a problem getting this tutorial to work, you can look within the following directories for monitoring and troubleshooting:


Prompt:
Complete this text code:

/var/lib/cni
/var/lib/containers
/var/lib/kubelet

Response:
/var/log/containers
/var/log/pods


Prompt:
Explain this text code:

/var/lib/cni
/var/lib/containers
/var/lib/kubelet

/var/log/containers
/var/log/pods

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Complete this shell code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet

Response:
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods


Prompt:
Explain this shell code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods

Response: This shell code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Complete this shell code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib

Response:
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers


Prompt:
Explain this shell code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers

Response: This shell code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this shell code:

sudo rm -rf /opt/cni
sudo rm -rf /etc/cni
sudo rm -rf /var/lib/cni

Response: This shell code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this text code:

sudo tee /etc/sysctl.d/k8s.conf <<EOF
net.ipv4.ip_forward = 1
EOF

Response: This text code Running Kubelet in Standalone Mode | Apply the changes to the system:


Prompt:
Explain this text code:

curl https://raw.githubusercontent.com/cri-o/packaging/main/get > crio-install

Response: This text code Running Kubelet in Standalone Mode | Run the installer script:


Prompt:
Explain this text code:

sudo systemctl daemon-reload
sudo systemctl enable --now crio.service

Response: This text code Running Kubelet in Standalone Mode | Quick test:


Prompt:
Complete this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {

Response:
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}


Prompt:
Explain this json code:

{
  "cniVersion": "1.0.0",
  "name": "crio",
  "plugins": [
    {
      "type": "bridge",
      "bridge": "cni0",
      "isGateway": true,
      "ipMasq": true,
      "hairpinMode": true,
      "ipam": {
        "type": "host-local",
        "routes": [
            { "dst": "0.0.0.0/0" }
        ],
        "ranges": [
            [{ "subnet": "10.85.0.0/16" }]
        ]
      }
    }
  ]
}

Response: This json code Running Kubelet in Standalone Mode | Download the latest stable release of the kubelet.


Prompt:
Explain this text code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubelet"

Response: This text code Running Kubelet in Standalone Mode | curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"


Prompt:
Explain this text code:

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubelet"

Response: This text code Running Kubelet in Standalone Mode | Configure:


Prompt:
Complete this yaml code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!

Response:
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF


Prompt:
Explain this yaml code:

sudo tee /etc/kubernetes/kubelet.yaml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
authentication:
  webhook:
    enabled: false # Do NOT use in production clusters!
authorization:
  mode: AlwaysAllow # Do NOT use in production clusters!
enableServer: false
logging:
  format: text
address: 127.0.0.1 # Restrict access to localhost
readOnlyPort: 10255 # Do NOT use in production clusters!
staticPodPath: /etc/kubernetes/manifests
containerRuntimeEndpoint: unix:///var/run/crio/crio.sock
EOF

Response: This yaml code Running Kubelet in Standalone Mode | Because you are not setting up a production cluster, you are using plain HTTP (readOnlyPort: 10255) for unauthenticated queries to the kubelet's API.


Prompt:
Complete this text code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \

Response:
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF


Prompt:
Explain this text code:

sudo tee /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubelet

[Service]
ExecStart=/usr/bin/kubelet \
 --config=/etc/kubernetes/kubelet.yaml
Restart=always

[Install]
WantedBy=multi-user.target
EOF

Response: This text code Running Kubelet in Standalone Mode | The command line argument --kubeconfig has been intentionally omitted in the service configuration file. This argument sets the path to a kubeconfig file that specifies how to connect to the API serve


Prompt:
Explain this text code:

sudo systemctl daemon-reload
sudo systemctl enable --now kubelet.service

Response: This text code Running Kubelet in Standalone Mode | Quick test:


Prompt:
Complete this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",

Response:
  "metadata": {},
  "items": null
}


Prompt:
Explain this json code:

{
  "kind": "PodList",
  "apiVersion": "v1",
  "metadata": {},
  "items": null
}

Response: This json code Running Kubelet in Standalone Mode | In standalone mode, you can run Pods using Pod manifests. The manifests can either be on the local filesystem, or fetched via HTTP from a configuration source.


Prompt:
Complete this yaml code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:

Response:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF


Prompt:
Explain this yaml code:

cat <<EOF > static-web.yaml
apiVersion: v1
kind: Pod
metadata:
  name: static-web
spec:
  containers:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          protocol: TCP
EOF

Response: This yaml code Running Kubelet in Standalone Mode | Copy the static-web.yaml manifest file to the /etc/kubernetes/manifests directory.


Prompt:
Explain this text code:

curl http://localhost:10255/pods | jq '.items[].status.podIP'

Response: This text code Running Kubelet in Standalone Mode | The output is similar to:


Prompt:
Complete this text code:

<!DOCTYPE html>
<html>

Response:
<head>
<title>Welcome to nginx!</title>
...


Prompt:
Explain this text code:

<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
...

Response: This text code Running Kubelet in Standalone Mode | If you need to diagnose a problem getting this tutorial to work, you can look within the following directories for monitoring and troubleshooting:


Prompt:
Complete this text code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet

Response:
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods


Prompt:
Explain this text code:

sudo systemctl disable --now kubelet.service
sudo systemctl daemon-reload
sudo rm /etc/systemd/system/kubelet.service
sudo rm /usr/bin/kubelet
sudo rm -rf /etc/kubernetes
sudo rm -rf /var/lib/kubelet
sudo rm -rf /var/log/containers
sudo rm -rf /var/log/pods

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Complete this text code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib

Response:
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers


Prompt:
Explain this text code:

sudo systemctl disable --now crio.service
sudo systemctl daemon-reload
sudo rm -rf /usr/local/bin
sudo rm -rf /usr/local/lib
sudo rm -rf /usr/local/share
sudo rm -rf /usr/libexec/crio
sudo rm -rf /etc/crio
sudo rm -rf /etc/containers

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this text code:

sudo rm -rf /opt/cni
sudo rm -rf /etc/cni
sudo rm -rf /var/lib/cni

Response: This text code Running Kubelet in Standalone Mode | This page covered the basic aspects of deploying a kubelet in standalone mode. You are now ready to deploy Pods and test additional functionality.


Prompt:
Explain this text code:

mkdir $GOPATH/src
cd $GOPATH/src
go get github.com/kubernetes/kubernetes

Response: This text code Contributing to the Upstream Kubernetes Code | Determine the base directory of your clone of the kubernetes/kubernetes repository. For example, if you followed the preceding step to get the repository, your base directory is $GOPATH/src/github.com

Context: Contributing to the Upstream Kubernetes Code | Determine the base directory of your clone of the kubernetes/kubernetes repository. For example, if you followed the preceding step to get the repository, your base directory is $GOPATH/src/github.com


Prompt:
Explain this text code:

cd <k8s-base>
git checkout master
git pull https://github.com/kubernetes/kubernetes master

Response: This text code Contributing to the Upstream Kubernetes Code | Suppose this source file in that default branch has the typo "atmost":

Context: Contributing to the Upstream Kubernetes Code | Suppose this source file in that default branch has the typo "atmost":


Prompt:
Explain this text code:

On branch master
...
    modified:   staging/src/k8s.io/api/apps/v1/types.go

Response: This text code Contributing to the Upstream Kubernetes Code | Run git add and git commit to commit the changes you have made so far. In the next step, you will do a second commit. It is important to keep your changes separated into two commits.

Context: Contributing to the Upstream Kubernetes Code | Run git add and git commit to commit the changes you have made so far. In the next step, you will do a second commit. It is important to keep your changes separated into two commits.


Prompt:
Explain this text code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This text code Contributing to the Upstream Kubernetes Code | Run git status to see what was generated.

Context: Contributing to the Upstream Kubernetes Code | Run git status to see what was generated.


Prompt:
Complete this text code:

On branch master
...
    modified:   api/openapi-spec/swagger.json

Response:
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go

Context: Contributing to the Upstream Kubernetes Code | View the contents of api/openapi-spec/swagger.json to make sure the typo is fixed. For example, you could run git diff -a api/openapi-spec/swagger.json. This is important, because swagger.json is the


Prompt:
Explain this text code:

On branch master
...
    modified:   api/openapi-spec/swagger.json
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go

Response: This text code Contributing to the Upstream Kubernetes Code | View the contents of api/openapi-spec/swagger.json to make sure the typo is fixed. For example, you could run git diff -a api/openapi-spec/swagger.json. This is important, because swagger.json is the


Prompt:
Explain this text code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This text code Contributing to the Upstream Kubernetes Code | Now add a commit to your cherry-pick pull request that has the recently generated OpenAPI spec and related files. Monitor your pull request until it gets merged into the release-1.33 branch.

Context: Contributing to the Upstream Kubernetes Code | Now add a commit to your cherry-pick pull request that has the recently generated OpenAPI spec and related files. Monitor your pull request until it gets merged into the release-1.33 branch.


Prompt:
Explain this shell code:

mkdir $GOPATH/src
cd $GOPATH/src
go get github.com/kubernetes/kubernetes

Response: This shell code Contributing to the Upstream Kubernetes Code | Determine the base directory of your clone of the kubernetes/kubernetes repository. For example, if you followed the preceding step to get the repository, your base directory is $GOPATH/src/github.com


Prompt:
Explain this text code:

$GOPATH/src/github.com/kubernetes-sigs/reference-docs

Response: This text code Contributing to the Upstream Kubernetes Code | The Kubernetes API reference documentation is automatically generated from an OpenAPI spec, which is generated from the Kubernetes source code. If you want to change the API reference documentation, t

Context: Contributing to the Upstream Kubernetes Code | The Kubernetes API reference documentation is automatically generated from an OpenAPI spec, which is generated from the Kubernetes source code. If you want to change the API reference documentation, t


Prompt:
Explain this shell code:

cd <k8s-base>
git checkout master
git pull https://github.com/kubernetes/kubernetes master

Response: This shell code Contributing to the Upstream Kubernetes Code | Suppose this source file in that default branch has the typo "atmost":


Prompt:
Explain this shell code:

On branch master
...
    modified:   staging/src/k8s.io/api/apps/v1/types.go

Response: This shell code Contributing to the Upstream Kubernetes Code | Run git add and git commit to commit the changes you have made so far. In the next step, you will do a second commit. It is important to keep your changes separated into two commits.


Prompt:
Explain this shell code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This shell code Contributing to the Upstream Kubernetes Code | Run git status to see what was generated.


Prompt:
Complete this shell code:

On branch master
...
    modified:   api/openapi-spec/swagger.json

Response:
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go


Prompt:
Explain this shell code:

On branch master
...
    modified:   api/openapi-spec/swagger.json
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go

Response: This shell code Contributing to the Upstream Kubernetes Code | View the contents of api/openapi-spec/swagger.json to make sure the typo is fixed. For example, you could run git diff -a api/openapi-spec/swagger.json. This is important, because swagger.json is the


Prompt:
Explain this shell code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This shell code Contributing to the Upstream Kubernetes Code | Now add a commit to your cherry-pick pull request that has the recently generated OpenAPI spec and related files. Monitor your pull request until it gets merged into the release-1.33 branch.


Prompt:
Explain this text code:

mkdir $GOPATH/src
cd $GOPATH/src
go get github.com/kubernetes/kubernetes

Response: This text code Contributing to the Upstream Kubernetes Code | Determine the base directory of your clone of the kubernetes/kubernetes repository. For example, if you followed the preceding step to get the repository, your base directory is $GOPATH/src/github.com


Prompt:
Explain this text code:

cd <k8s-base>
git checkout master
git pull https://github.com/kubernetes/kubernetes master

Response: This text code Contributing to the Upstream Kubernetes Code | Suppose this source file in that default branch has the typo "atmost":


Prompt:
Explain this text code:

On branch master
...
    modified:   staging/src/k8s.io/api/apps/v1/types.go

Response: This text code Contributing to the Upstream Kubernetes Code | Run git add and git commit to commit the changes you have made so far. In the next step, you will do a second commit. It is important to keep your changes separated into two commits.


Prompt:
Explain this text code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This text code Contributing to the Upstream Kubernetes Code | Run git status to see what was generated.


Prompt:
Complete this text code:

On branch master
...
    modified:   api/openapi-spec/swagger.json

Response:
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go


Prompt:
Explain this text code:

On branch master
...
    modified:   api/openapi-spec/swagger.json
    modified:   api/openapi-spec/v3/apis__apps__v1_openapi.json
    modified:   pkg/generated/openapi/zz_generated.openapi.go
    modified:   staging/src/k8s.io/api/apps/v1/generated.proto
    modified:   staging/src/k8s.io/api/apps/v1/types_swagger_doc_generated.go

Response: This text code Contributing to the Upstream Kubernetes Code | View the contents of api/openapi-spec/swagger.json to make sure the typo is fixed. For example, you could run git diff -a api/openapi-spec/swagger.json. This is important, because swagger.json is the


Prompt:
Explain this text code:

./hack/update-codegen.sh
./hack/update-openapi-spec.sh

Response: This text code Contributing to the Upstream Kubernetes Code | Now add a commit to your cherry-pick pull request that has the recently generated OpenAPI spec and related files. Monitor your pull request until it gets merged into the release-1.33 branch.


Prompt:
Explain this bash code:

kubectl scale statefulsets <stateful-set-name> --replicas=<new-replicas>

Response: This bash code Scale a StatefulSet | Alternatively, you can do in-place updates on your StatefulSets.

Context: Scale a StatefulSet | Alternatively, you can do in-place updates on your StatefulSets.


Prompt:
Explain this bash code:

kubectl patch statefulsets <stateful-set-name> -p '{"spec":{"replicas":<new-replicas>}}'

Response: This bash code Scale a StatefulSet | You cannot scale down a StatefulSet when any of the stateful Pods it manages is unhealthy. Scaling down only takes place after those stateful Pods become running and ready.

Context: Scale a StatefulSet | You cannot scale down a StatefulSet when any of the stateful Pods it manages is unhealthy. Scaling down only takes place after those stateful Pods become running and ready.


Prompt:
Explain this shell code:

kubectl scale statefulsets <stateful-set-name> --replicas=<new-replicas>

Response: This shell code Scale a StatefulSet | Alternatively, you can do in-place updates on your StatefulSets.


Prompt:
Explain this shell code:

kubectl patch statefulsets <stateful-set-name> -p '{"spec":{"replicas":<new-replicas>}}'

Response: This shell code Scale a StatefulSet | You cannot scale down a StatefulSet when any of the stateful Pods it manages is unhealthy. Scaling down only takes place after those stateful Pods become running and ready.


Prompt:
Explain this bash code:

kubectl scale statefulsets <stateful-set-name> --replicas=<new-replicas>

Response: This bash code Scale a StatefulSet | Alternatively, you can do in-place updates on your StatefulSets.


Prompt:
Explain this bash code:

kubectl patch statefulsets <stateful-set-name> -p '{"spec":{"replicas":<new-replicas>}}'

Response: This bash code Scale a StatefulSet | You cannot scale down a StatefulSet when any of the stateful Pods it manages is unhealthy. Scaling down only takes place after those stateful Pods become running and ready.


Prompt:
Complete this text code:

# Set the last-applied-configuration of a resource to match the contents of a file
  kubectl apply set-last-applied -f deploy.yaml

  # Execute set-last-applied against each configuration file in a directory

Response:
  kubectl apply set-last-applied -f path/

  # Set the last-applied-configuration of a resource to match the contents of a file; will create the annotation if it does not already exist
  kubectl apply set-last-applied -f deploy.yaml --create-annotation=true

Context: kubectl apply set-last-applied | If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.


Prompt:
Explain this text code:

# Set the last-applied-configuration of a resource to match the contents of a file
  kubectl apply set-last-applied -f deploy.yaml

  # Execute set-last-applied against each configuration file in a directory
  kubectl apply set-last-applied -f path/

  # Set the last-applied-configuration of a resource to match the contents of a file; will create the annotation if it does not already exist
  kubectl apply set-last-applied -f deploy.yaml --create-annotation=true

Response: This text code kubectl apply set-last-applied | If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.


Prompt:
Complete this text code:

# Set the last-applied-configuration of a resource to match the contents of a file
  kubectl apply set-last-applied -f deploy.yaml

  # Execute set-last-applied against each configuration file in a directory

Response:
  kubectl apply set-last-applied -f path/

  # Set the last-applied-configuration of a resource to match the contents of a file; will create the annotation if it does not already exist
  kubectl apply set-last-applied -f deploy.yaml --create-annotation=true


Prompt:
Explain this text code:

# Set the last-applied-configuration of a resource to match the contents of a file
  kubectl apply set-last-applied -f deploy.yaml

  # Execute set-last-applied against each configuration file in a directory
  kubectl apply set-last-applied -f path/

  # Set the last-applied-configuration of a resource to match the contents of a file; will create the annotation if it does not already exist
  kubectl apply set-last-applied -f deploy.yaml --create-annotation=true

Response: This text code kubectl apply set-last-applied | If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:

Response:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

Context: Pods | To create the Pod shown above, run the following command:


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

Response: This yaml code Pods | To create the Pod shown above, run the following command:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/simple-pod.yaml

Response: This bash code Pods | Pods are generally not created directly and are created using workload resources. See Working with Pods for more information on how Pods are used with workload resources.

Context: Pods | Pods are generally not created directly and are created using workload resources. See Working with Pods for more information on how Pods are used with workload resources.


Prompt:
Complete this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template

Response:
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here

Context: Pods | Modifying the pod template or switching to a new pod template has no direct effect on the Pods that already exist. If you change the pod template for a workload resource, that resource needs to create


Prompt:
Explain this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here

Response: This yaml code Pods | Modifying the pod template or switching to a new pod template has no direct effect on the Pods that already exist. If you change the pod template for a workload resource, that resource needs to create


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:

Response:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

Response: This yaml code Pods | To create the Pod shown above, run the following command:


Prompt:
Explain this shell code:

kubectl apply -f https://k8s.io/examples/pods/simple-pod.yaml

Response: This shell code Pods | Pods are generally not created directly and are created using workload resources. See Working with Pods for more information on how Pods are used with workload resources.


Prompt:
Complete this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template

Response:
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here


Prompt:
Explain this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here

Response: This yaml code Pods | Modifying the pod template or switching to a new pod template has no direct effect on the Pods that already exist. If you change the pod template for a workload resource, that resource needs to create


Prompt:
Complete this yaml code:

pods/simple-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx

Response:
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80


Prompt:
Explain this yaml code:

pods/simple-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

Response: This yaml code Pods | To create the Pod shown above, run the following command:


Prompt:
Complete this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:

Response:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80


Prompt:
Explain this yaml code:

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

Response: This yaml code Pods | To create the Pod shown above, run the following command:


Prompt:
Explain this bash code:

kubectl apply -f https://k8s.io/examples/pods/simple-pod.yaml

Response: This bash code Pods | Pods are generally not created directly and are created using workload resources. See Working with Pods for more information on how Pods are used with workload resources.


Prompt:
Complete this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template

Response:
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here


Prompt:
Explain this yaml code:

apiVersion: batch/v1
kind: Job
metadata:
  name: hello
spec:
  template:
    # This is the pod template
    spec:
      containers:
      - name: hello
        image: busybox:1.28
        command: ['sh', '-c', 'echo "Hello, Kubernetes!" && sleep 3600']
      restartPolicy: OnFailure
    # The pod template ends here

Response: This yaml code Pods | Modifying the pod template or switching to a new pod template has no direct effect on the Pods that already exist. If you change the pod template for a workload resource, that resource needs to create


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 bash code:

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

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

Context: ReplicationController | The output is similar to this: