Kubernetes YAML

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apiVersion:
kind:
metadata:


spec:

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apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
  labels:
    app: myapp
    type: front-end
spec:
  containers:
    - name: nginx-continer
      image: nginx

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kubectl create -f pod-definition.yml

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kubectl run myapp-pod --image nginx

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kubectl get pods

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kubectl describe pod myapp-pod

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apiVersion: v1
kind: ReplicationController
metadata: # -> Replication Controller
  name: myapp-rc
  labels:
    app: myapp
    type: front-end
spec: # -> Replication Controller
  template:
    metadata: # -> POD
      name: myapp-pod
      labels:
        app: myapp
        type: front-end
    spec: # -> POD
      containers:
        - name: nginx-continer
          image: nginx
  replicas: 3

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kubectl create -f rc-definition.yml

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kubectl get replicationcontroller

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kubectl get pods

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apiVersion: apps/v1
kind: ReplicaSet
metadata: # -> ReplicaSet
  name: myapp-replicaset
  labels:
    app: myapp
    type: front-end
spec: # -> ReplicaSet
  template:
    metadata: # -> POD
      name: myapp-pod
      labels:
        app: myapp
        type: front-end
    spec: # -> POD
      containers:
        - name: nginx-continer
          image: nginx
  replicas: 3
  selector: # -> `selector` is not required by Replication Controller
    matchLabels:
      type: front-end

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kubectl create -f rs-definition.yml

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kubectl get replicaset

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kubectl describe replicaset myapp-replicaset

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kubectl get pods

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kubectl delete replicaset myapp-replicaset

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kubectl replace -f rs-definition.yml

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kubectl scale --replicas=6 -f rs-definition.yml

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kubectl scale --replicas=6 replicaset myapp-replicaset