k8s——deployment

创建deployment

[root@master deploy]# kubectl create deploy nginx-deploy --image=nginx:1.7.9

deployment.apps/nginx-deploy created

// kubectl create 资源类型   资源名称（deployment的名称）  指定镜像

// 都是在动态的更新pod副本的数量   deployment和replicaSet是嵌套关系，

[root@master deploy]# kubectl get deploy

NAME           READY   UP-TO-DATE   AVAILABLE   AGE

nginx-deploy   1/1     1            1           66s

[root@master deploy]# kubectl get rs

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   1         1         1       75s

[root@master deploy]# kubectl get replicaset

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   1         1         1       4m5s

[root@master deploy]# kubectl get po

NAME                            READY   STATUS    RESTARTS      AGE

my-pod                          1/1     Running   1 (19m ago)   4d19h

nginx-demo                      1/1     Running   2 (19m ago)   4d23h

nginx-deploy-68c658776b-z9rc6   1/1     Running   0             4m48s

nginx-po                        1/1     Running   2 (19m ago)   4d23h

[root@master deploy]# 

//先是有deployment，然后有replicaSet，然后有pod

//vim :set paste 粘贴模式

[root@master deploy]# vim nginx-deploy.yaml 

apiVersion: apps/v1  #deployment api 版本

kind: Deployment # 资源类型为deployment

metadata:      # 元数据

  labels:      # 标签

    app: nginx-deploy   # 具体的 k:y配置形式

  name: nginx-deploy     # deployment的名字

  namespace: default    # 所在的命名空间

spec:

  replicas: 1     # 期望的副本数

  revisionHistoryLimit: 10     # 进行滚动更新后，保留的历史版本数

  selector:    # 选择器，用于找到匹配的rs

    matchLabels:  # 按照标签匹配

      app: nginx-deploy     # 匹配的标签k:y

  strategy:      # 更新策略

    rollingUpdate:      #  滚动更新配置

      maxSurge: 25%       # 进行滚动更新时候，更新的个数最多可以超过预期副本数的个数/比

例

      maxUnavailable: 25%  #进行滚动更新时，最大不可用更新比例，表述在所有副本数中，最>多可以有多少个不更新成功

    type: RollingUpdate   # 更新类型，采用滚动更新

  template:    # pod模版

    metadata:  # pod原信息

      labels:  # pod标签

        app: nginx-deploy

    spec:      # pod的期望信息

      containers:   # pod 的容器

      - image: nginx:1.7.9   # 镜像

        imagePullPolicy: IfNotPresent   # 拉取策略

        name: nginx   # 容器名称

      restartPolicy: Always  # 重启策略

      terminationGracePeriodSeconds: 30    #删除操作最多宽限多久

滚动更新

[root@master deploy]# kubectl edit deploy nginx-deploy

deployment.apps/nginx-deploy edited

[root@master deploy]# kubectl get deploy

NAME           READY   UP-TO-DATE   AVAILABLE   AGE

nginx-deploy   3/3     3            3           28m

[root@master deploy]# kubectl get rs

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   3         3         3       29m

[root@master deploy]# kubectl get po

NAME                            READY   STATUS    RESTARTS      AGE

my-pod                          1/1     Running   1 (44m ago)   4d19h

nginx-demo                      1/1     Running   2 (44m ago)   4d23h

nginx-deploy-68c658776b-hgppq   1/1     Running   0             23s

nginx-deploy-68c658776b-vld7l   1/1     Running   0             23s

nginx-deploy-68c658776b-z9rc6   1/1     Running   0             29m

nginx-po                        1/1     Running   2 (44m ago)   4d23h

[root@master deploy]# 

//开两个终端

[root@master deploy]# kubectl set image deployment/nginx-deploy nginx=nginx:1.7.9

deployment.apps/nginx-deploy image updated

[root@master deploy]# 

[root@master deploy]# kubectl rollout status deplloy nginx-deploy

Waiting for deployment "nginx-deploy" rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for deployment "nginx-deploy" rollout to finish: 1 old replicas are pending termination...

Waiting for deployment "nginx-deploy" rollout to finish: 1 old replicas are pending termination...

deployment "nginx-deploy" successfully rolled out

[root@master deploy]#

# 滚动更新过程

1.创建一个空的rs2

2.在空的rs2中创建pod1，在rs1中关闭原pod1

3. 在rs2中创建pod2，在rs1中关闭原pod2

//整个过程中保持2个pod的存在

# 查看rs可以看到2个rs

[root@master deploy]# kubectl get rs --show-labels

NAME                      DESIRED   CURRENT   READY   AGE     LABELS

nginx-deploy-68c658776b   3         3         3       40m     app=nginx-deploy,pod-template-hash=68c658776b

nginx-deploy-7c97fc8644   0         0         0       9m21s   app=nginx-deploy,pod-template-hash=7c97fc8644

[root@master deploy]#

回滚

// 当你的更新存在问题，可以回滚

//可以使用如下命令查看更新的历史版本

[root@master deploy]# kubectl rollout history deployment/nginx-deploy

deployment.apps/nginx-deploy

REVISION  CHANGE-CAUSE

2         <none>

3         <none>

// 查看历史版本

[root@master deploy]# kubectl rollout history deployment/nginx-deploy --revision=2

deployment.apps/nginx-deploy with revision #2

Pod Template:

  Labels:	app=nginx-deploy

	pod-template-hash=7c97fc8644

  Containers:

   nginx:

    Image:	nginx:1.9.1

    Port:	<none>

    Host Port:	<none>

    Environment:	<none>

    Mounts:	<none>

  Volumes:	<none>

[root@master deploy]# kubectl rollout history deployment/nginx-deploy --revision=3

deployment.apps/nginx-deploy with revision #3

Pod Template:

  Labels:	app=nginx-deploy

	pod-template-hash=68c658776b

  Containers:

   nginx:

    Image:	nginx:1.7.9

    Port:	<none>

    Host Port:	<none>

    Environment:	<none>

    Mounts:	<none>

  Volumes:	<none>

// 会记录修改的值

// 回退操作

[root@master deploy]# kubectl rollout undo deployment/nginx-deploy --to-revision=2

deployment.apps/nginx-deploy rolled back

[root@master deploy]# kubectl rollout status deployment/nginx-deploy

deployment "nginx-deploy" successfully rolled out

[root@master deploy]# 

// 回退操作 在.spec.revisionHistoryLimit 中指定deploment保留多少revision，如果设置0，则不允许回滚

扩容和缩容

扩容

[root@master deploy]# kubectl scale --replicas=6 deploy nginx-deploy

deployment.apps/nginx-deploy scaled

[root@master deploy]# kubectl get po

NAME                            READY   STATUS    RESTARTS      AGE

my-pod                          1/1     Running   1 (81m ago)   4d20h

nginx-demo                      1/1     Running   2 (81m ago)   5d

nginx-deploy-7c97fc8644-62dpp   1/1     Running   0             13m

nginx-deploy-7c97fc8644-g48zt   1/1     Running   0             10s

nginx-deploy-7c97fc8644-jlhfn   1/1     Running   0             13m

nginx-deploy-7c97fc8644-lqpxj   1/1     Running   0             13m

nginx-deploy-7c97fc8644-v69f4   1/1     Running   0             10s

nginx-deploy-7c97fc8644-zslj4   1/1     Running   0             10s

nginx-po                        1/1     Running   2 (81m ago)   5d

[root@master deploy]# kubectl get rs

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   0         0         0       66m

nginx-deploy-7c97fc8644   6         6         6       36m

[root@master deploy]# kubectl get deploy

NAME           READY   UP-TO-DATE   AVAILABLE   AGE

nginx-deploy   6/6     6            6           67m

[root@master deploy]#

缩容

[root@master deploy]# kubectl scale --replicas=3 deploy nginx-deploy

deployment.apps/nginx-deploy scaled

[root@master deploy]# kubectl get po

NAME                            READY   STATUS    RESTARTS      AGE

my-pod                          1/1     Running   1 (83m ago)   4d20h

nginx-demo                      1/1     Running   2 (83m ago)   5d

nginx-deploy-7c97fc8644-62dpp   1/1     Running   0             14m

nginx-deploy-7c97fc8644-jlhfn   1/1     Running   0             14m

nginx-deploy-7c97fc8644-lqpxj   1/1     Running   0             14m

nginx-po                        1/1     Running   2 (83m ago)   5d

[root@master deploy]# kubectl get deploy

NAME           READY   UP-TO-DATE   AVAILABLE   AGE

nginx-deploy   3/3     3            3           68m

[root@master deploy]#

暂停与恢复

暂停

// 由于每次对pod template的修改都会触发更新，所以可以通过暂停更新来避免频繁更新。我们可以先暂停更新，然后修改pod template，最后恢复更新。

[root@master deploy]# kubectl rollout pause deployment nginx-deploy

deployment.apps/nginx-deploy paused

[root@master deploy]# kubectl edit deploy nginx-deployment

Error from server (NotFound): deployments.apps "nginx-deployment" not found

[root@master deploy]# kubectl edit deploy nginx-deploy

deployment.apps/nginx-deploy edited

[root@master deploy]# kubectl rollout  history deployment  nginx-deploy

deployment.apps/nginx-deploy

REVISION  CHANGE-CAUSE

3         <none>

4         <none>

[root@master deploy]# kubectl rollout  history deployment  nginx-deploy  --revision=4

deployment.apps/nginx-deploy with revision #4

Pod Template:

  Labels:	app=nginx-deploy

	pod-template-hash=7c97fc8644

  Containers:

   nginx:

    Image:	nginx:1.9.1

    Port:	<none>

    Host Port:	<none>

    Environment:	<none>

    Mounts:	<none>

  Volumes:	<none>

[root@master deploy]# kubectl get rs

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   0         0         0       80m

nginx-deploy-7c97fc8644   3         3         3       49m

[root@master deploy]#

恢复

[root@master deploy]#

[root@master deploy]# kubectl rollout resume deployment nginx-deploy

deployment.apps/nginx-deploy resumed

[root@master deploy]# kubectl get rs

NAME                      DESIRED   CURRENT   READY   AGE

nginx-deploy-68c658776b   0         0         0       82m

nginx-deploy-6cbbdbbf8b   3         3         3       10s

nginx-deploy-7c97fc8644   0         0         0       51m

[root@master deploy]# kubectl rollout  history

daemonset    deployment   statefulset

[root@master deploy]# kubectl rollout  history deployment  nginx-deploy

deployment.apps/nginx-deploy

REVISION  CHANGE-CAUSE

3         <none>

4         <none>

5         <none>

[root@master deploy]# kubectl rollout  history deployment  nginx-deploy  --revision=5

deployment.apps/nginx-deploy with revision #5

Pod Template:

  Labels:	app=nginx-deploy

	pod-template-hash=6cbbdbbf8b

  Containers:

   nginx:

    Image:	nginx:1.9.1

    Port:	<none>

    Host Port:	<none>

    Limits:

      cpu:	500m

      memory:	512Mi

    Requests:

      cpu:	100m

      memory:	128Mi

    Environment:	<none>

    Mounts:	<none>

  Volumes:	<none>

[root@master deploy]#

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k8s——deployment

创建deployment

滚动更新

回滚

扩容和缩容

扩容

缩容

暂停与恢复

暂停

恢复

k8s——deployment的更多相关文章

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