Kubernetes 1.19.0——deployment(3)

[root@vms61 chap5-deploy]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
web1-5c445ff8fc-dvd29   1/1     Running   0          10s
[root@vms61 chap5-deploy]# kubectl get deploy
NAME   READY   UP-TO-DATE   AVAILABLE   AGE
web1   1/1     1            1           11m
[root@vms61 chap5-deploy]# kubectl scale deploy web1 --replicas=5
deployment.apps/web1 scaled
[root@vms61 chap5-deploy]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
web1-5c445ff8fc-264n5   1/1     Running   0          7s
web1-5c445ff8fc-7bhnn   1/1     Running   0          7s
web1-5c445ff8fc-dvd29   1/1     Running   0          12m
web1-5c445ff8fc-lfw4n   1/1     Running   0          7s
web1-5c445ff8fc-w9cpp   1/1     Running   0          7s
[root@vms61 chap5-deploy]# kubectl get deploy -o wide
NAME   READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES   SELECTOR
web1   5/5     5            5           12m   nginx        nginx    app=web1

[root@vms61 chap5-deploy]# kubectl edit deployments.apps web1 
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "2"
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"apps/v1","kind":"Deployment","metadata":{"annotations":{},"creationTimestamp":null,"labels":{"app":"web1"},"name":"web1","namespace":"chap5-deploy"},"spec":{"replicas":1,"selector":{"matchLabels":{"app":"web1"}},"strategy":{},"template":{"metadata":{"creationTimestamp":null,"labels":{"app":"web1","app1":"web1","app2":"web2"}},"spec":{"containers":[{"env":[{"name":"myenv1","value":"haha1"},{"name":"myenv2","value":"haha2"}],"image":"nginx","imagePullPolicy":"IfNotPresent","name":"nginx","ports":[{"containerPort":80}],"resources":{"requests":{"cpu":"400m"}},"volumeMounts":[{"mountPath":"/xx","name":"v1"}]}],"volumes":[{"emptyDir":{},"name":"v1"}]}}},"status":{}}
  creationTimestamp: "2020-09-27T10:29:12Z"
  generation: 3
  labels:
    app: web1
  name: web1
  namespace: chap5-deploy
  resourceVersion: "364400"
  selfLink: /apis/apps/v1/namespaces/chap5-deploy/deployments/web1
  uid: 3fa8c9ae-c38d-42b2-91a9-68aed7b0bcdd
spec:
  progressDeadlineSeconds: 600
  replicas: 5
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      app: web1
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: web1
        app1: web1
        app2: web2
    spec:
      containers:
      - env:
        - name: myenv1
          value: haha1
        - name: myenv2
          value: haha2
  image: nginx:1.7.9
        imagePullPolicy: IfNotPresent
        name: nginx
        ports:
        - containerPort: 80
          protocol: TCP

[root@vms61 chap5-deploy]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
web1-5bb7b69555-sjwvp   1/1     Running   0          2s
[root@vms61 chap5-deploy]# kubectl get deploy -o wide
NAME   READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES   SELECTOR
web1   1/1     1            1           11s   cname        nginx    app=web1
[root@vms61 chap5-deploy]# kubectl scale deploy web1 --replicas=5
deployment.apps/web1 scaled
[root@vms61 chap5-deploy]# kubectl get pods
NAME                    READY   STATUS    RESTARTS   AGE
web1-5bb7b69555-2rwgd   1/1     Running   0          3s
web1-5bb7b69555-5mxmc   1/1     Running   0          3s
web1-5bb7b69555-dd8sg   1/1     Running   0          3s
web1-5bb7b69555-fdvdj   1/1     Running   0          3s
web1-5bb7b69555-sjwvp   1/1     Running   0          42s
[root@vms61 chap5-deploy]# kubectl set image deploy/web1 cname=nginx:1.9 --record 
deployment.apps/web1 image updated
[root@vms61 chap5-deploy]# kubectl get deploy -o wide
NAME   READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES      SELECTOR
web1   4/5     5            4           74s   cname        nginx:1.9   app=web1
[root@vms61 chap5-deploy]# kubectl rollout history deployment web1 
deployment.apps/web1 
REVISION  CHANGE-CAUSE
1         <none>
2         kubectl set image deploy/web1 cname=nginx:1.9 --record=true

[root@vms61 chap5-deploy]# kubectl rollout undo --help | grep to
Rollback to a previous rollout.
  # Rollback to the previous deployment
  # Rollback to daemonset revision 3
  kubectl rollout undo daemonset/abc --to-revision=3
  # Rollback to the previous deployment with dry-run
      --allow-missing-template-keys=true: 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.
  -f, --filename=[]: Filename, directory, or URL to files identifying the resource to get from a server.
  -k, --kustomize='': Process the kustomization directory. This flag can't be used together with -f or -R.
  -R, --recursive=false: Process the directory used in -f, --filename recursively. Useful when you want to manage related manifests organized within the same directory.
      --template='': Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
      --to-revision=0: The revision to rollback to. Default to 0 (last revision).
Use "kubectl options" for a list of global command-line options (applies to all commands).
[root@vms61 chap5-deploy]# kubectl rollout undo deployment web1 --to-revision=1

[root@vms61 chap5-deploy]# kubectl edit deployments.apps web1 
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1