02.replicaSets.md

replicaset > pod
이미 생성된 pod 도 포함할 수있음.

kubectl get rs

    NAME              DESIRED   CURRENT   READY   AGE
    new-replica-set   4         4         0       58s


kubectl describe rs new-replica-set


    Name:         new-replica-set
    Namespace:    default
    Selector:     name=busybox-pod
    Labels:       <none>
    Annotations:  <none>
    Replicas:     4 current / 4 desired
    Pods Status:  0 Running / 4 Waiting / 0 Succeeded / 0 Failed
    Pod Template:
      Labels:  name=busybox-pod
      Containers:
       busybox-container:
    	Image:      busybox777
    	Port:       <none>
    	Host Port:  <none>
    	Command:
    	  sh
    	  -c
    	  echo Hello Kubernetes! && sleep 3600
    	Environment:  <none>
    	Mounts:       <none>
      Volumes:        <none>
    Events:
      Type    Reason            Age   From                   Message
      ----    ------            ----  ----                   -------
      Normal  SuccessfulCreate  88s   replicaset-controller  Created pod: new-replica-set-zq26s
      Normal  SuccessfulCreate  88s   replicaset-controller  Created pod: new-replica-set-thgc8
      Normal  SuccessfulCreate  88s   replicaset-controller  Created pod: new-replica-set-9jk58
      Normal  SuccessfulCreate  88s   replicaset-controller  Created pod: new-replica-set-7kpwk


kubectl describe pod new-replica-set-7kpwk

check event



apps/v1
selector matchLabels = template metadata labels

    apiVersion: apps/v1
    kind: ReplicaSet
    metadata:
      name: replicaset-1
    spec:
      replicas: 2
      selector:
        matchLabels:
          tier: frontend
      template:
        metadata:
          labels:
            tier: frontend
        spec:
          containers:
          - name: nginx
            image: nginx


kubectl delete rs replicaset-2

kubectl edit rs new-replica-set

kubectl scale --replicas 0 rs new-replica-set

kubectl scale --replicas 4 rs new-replica-set