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02.kubernetes笔记|02.kubernetes笔记 Pod控制器(一) ReplicaSet

控制器简介 Kubernetes 中内建了很多 controller（控制器），这些相当于一个状态机，用来控制 Pod 的具体状态和行为

  • 负责应用编排的控制器类型有如下几种:
  • ReplicationController:最早期的Pod控制器;
  • RelicaSet: 副本集,负责管理一个应用(Pod）的多个副本;
  • Deployment: 部署，它不直接管理Pod，而是借助于ReplicaSet来管理Pod; 最常用的无状态应用控制器;
  • DaemonSet:守护进程集，用于确保在每个节点仅运行某个应用的一个Pod副本;
  • StatefulSet:功能类似于Deployment，但StatefulSet专用于编排有状态应用;
  • Job:有终止期限的一次性作业式任务，而非一直处于运行状态的服务进程;
  • CronJob:有终止期限的周期性作业式任务;
ReplicaSet 简介
  • ReplicationController 和 ReplicaSet
    ReplicationController（RC）用来确保容器应用的副本数始终保持在用户定义的副本数，即如果有容器异常退
    出，会自动创建新的 Pod 来替代；而如果异常多出来的容器也会自动回收；
    在新版本的 Kubernetes 中建议使用 ReplicaSet 来取代 ReplicationController 。ReplicaSet 跟
    ReplicationController 没有本质的不同，只是名字不一样，并且 ReplicaSet 支持集合式的 selector；
  • Pod控制器定义要素:
  • 标签选择器;
  • 期望的副本数;
  • Pod模板;
  • ReplicaSet的更新机制:
    删除式更新
    比如:- set image:更新应用版本，但对于replicaset来说，仅能更新API Server中的定义 实际运行Pod只能删除后重新启动才生效
Replicaset 字段说明
apiversion: apps/v1 kind: Replicaset metadata: name: ... namespace: … spec: minReadySeconds #Pod就绪后多少秒内任一容器无crash方可视为“就绪” replicas #期望的Pod副本数,默认为1 selectorl:#标签选择器，必须匹配template字段中Pod模板中的标签; matchExpressions_<[ ]Object> #标签选择器表达式列表，多个列表项之间为“与"关系 matchLabels #map格式的标签选择器; 和之前SVC的标签选择器为selector:类似 template: #Pod模板对象 metadata: #Pod对象元数据 labels: #由模板创建出的Pod对象所拥有的标签，必须要能够匹配前面定义的标签选择器 spec:# Pod规范,格式同自主式Pod ......

示例1：创ReplicaSet控制器
[root@k8s-master PodControl]# cat replicaset.demo.yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: replicaset-demo spec: minReadySeconds: 3 replicas: 2 selector: matchLabels: app: demoapp release: stable version: v1.0 template: metadata: labels:#这里的标签要能覆盖住上面的标签,可以比上面多但不能比上面少,因为理论上控制器如果匹配不到Pod 控制器会无限创建Pod,实际是建创时会报错 app: demoapp release: stable version: v1.0 test: test22 spec: containers: - name: demoapp image: ikubernetes/demoapp:v1.0 ports: - name: http containerPort: 80 livenessProbe: httpGet: path: '/livez' port: 80 initialDelaySeconds : 10 readinessProbe: httpGet: path: '/readyz' port: 80 initialDelaySeconds: 15[root@k8s-master PodControl]# kubectl get replicaset -o wide NAMEDESIREDCURRENTREADYAGECONTAINERSIMAGESSELECTOR replicaset-demo22230mdemoappikubernetes/demoapp:v1.0app=demoapp,release=stable,version=v1.0[root@k8s-master PodControl]# kubectl get pod -o wide NAMEREADYSTATUSRESTARTSAGEIPNODENOMINATED NODEREADINESS GATES my-grafana-7d788c5479-4ztb71/1Running044m10.244.1.208k8s-node1 replicaset-demo-b4hx91/1Running034m10.244.1.210k8s-node1 replicaset-demo-zb7m51/1Running134m10.244.2.203k8s-node2#查看描述信息 [root@k8s-master PodControl]# kubectl describe replicasets/replicaset-demo Name:replicaset-demo Namespace:default Selector:app=demoapp,release=stable,version=v1.0 Labels: Annotations: Replicas:2 current / 2 desired#现在运行 /期望运行 Pods Status:2 Running / 0 Waiting / 0 Succeeded / 0 Failed#Pod状态 Pod Template: Labels:app=demoapp release=stable test=test22 version=v1.0 Containers: demoapp: Image:ikubernetes/demoapp:v1.0 Port:80/TCP Host Port:0/TCP Liveness:http-get http://:80/livez delay=10s timeout=1s period=10s #success=1 #failure=3 Readiness:http-get http://:80/readyz delay=15s timeout=1s period=10s #success=1 #failure=3 Environment: Mounts: Volumes: Events: TypeReasonAgeFromMessage ------------------------- NormalSuccessfulCreate8m28sreplicaset-controllerCreated pod: replicaset-demo-b4hx9 NormalSuccessfulCreate8m28sreplicaset-controllerCreated pod: replicaset-demo-zb7m5[root@k8s-master PodControl]# kubectl get pod replicaset-demo-zb7m5 -o yaml ... ownerReferences:#查看Pod受哪个管理器管理 - apiVersion: apps/v1 blockOwnerDeletion: true controller: true kind: ReplicaSet name: replicaset-demo uid: d6525139-a5a5-4886-9c2b-d7cfe2db6d35 resourceVersion: "8790580" selfLink: /api/v1/namespaces/default/pods/replicaset-demo-zb7m5 ...

  • ReplicaSet更新 可使用kubectl set命令更新
[root@k8s-master PodControl]# kubectl set image --help#查看set更新的相关案例 Update existing container image(s) of resources. Possible resources include (case insensitive):pod (po), replicationcontroller (rc), deployment (deploy), daemonset (ds), replicaset (rs)Examples: # Set a deployment's nginx container image to 'nginx:1.9.1', and its busybox container image to 'busybox'. kubectl set image deployment/nginx busybox=busybox nginx=nginx:1.9.1# Update all deployments' and rc's nginx container's image to 'nginx:1.9.1' kubectl set image deployments,rc nginx=nginx:1.9.1 --all# Update image of all containers of daemonset abc to 'nginx:1.9.1' kubectl set image daemonset abc *=nginx:1.9.1# Print result (in yaml format) of updating nginx container image from local file, without hitting the server

  • 更新image镜像
[root@k8s-master PodControl]# kubectl set image replicasets/replicaset-demo demoapp=ikubernetes/demoapp:v1.1#更新replicasets中镜像版本为v1.1 replicaset.apps/replicaset-demo image updat[root@k8s-master PodControl]# kubectl get pod -o wide NAMEREADYSTATUSRESTARTSAGEIPNODENOMINATED NODEREADINESS GATES my-grafana-7d788c5479-4ztb71/1Running044m10.244.1.208k8s-node1 replicaset-demo-b4hx91/1Running034m10.244.1.210k8s-node1 replicaset-demo-zb7m51/1Running134m10.244.2.203k8s-node2[root@k8s-master PodControl]# kubectl get replicaset/replicaset-demo -o yaml|grep image ... - image: ikubernetes/demoapp:v1.1 imagePullPolicy: IfNotPresent#可以看到replicaset中的镜像信息已经更新成功 [root@k8s-master PodControl]# kubectl get pods replicaset-demo-zb7m5 -o yamlcontainerStatuses: - containerID: docker://4c4e576d7f5accb89c4f73a0aef18bd99cac37ee81b34a07a363d2afc35d5189 image: ikubernetes/demoapp:v1.0 imageID: docker-pullable://ikubernetes/demoapp@sha256:6698b205eb18fb0171398927f3a35fe27676c6bf5757ef57a35a4b055badf2c3#但Pod中的image并没有更新 [root@k8s-master PodControl]# curl 10.244.1.210 iKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-b4hx9, ServerIP: 10.244.1.210! [root@k8s-master PodControl]# curl 10.244.1.210 iKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-b4hx9, ServerIP: 10.244.1.210!#实际访问Pod 也并没有更新成功 这是因为ReplicaSet为删除式更新 Pod删除重启后才会生效 [root@k8s-master PodControl]# kubectl delete pod -l app=demoapp,release=stable pod "replicaset-demo-b4hx9" deleted pod "replicaset-demo-zb7m5" deleted[root@k8s-master PodControl]# kubectl get pod -o wide NAMEREADYSTATUSRESTARTSAGEIPNODENOMINATED NODEREADINESS GATES my-grafana-7d788c5479-4ztb71/1Running057m10.244.1.208k8s-node1 replicaset-demo-686fl0/1Running12m28s10.244.1.212k8s-node1 replicaset-demo-k4pq90/1Running02m28s10.244.3.49k8s-node3[root@k8s-master PodControl]# curl 10.244.3.49#更新成功 iKubernetes demoapp v1.1 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-k4pq9, ServerIP: 10.244.3.49! [root@k8s-master PodControl]# curl 10.244.3.49 iKubernetes demoapp v1.1 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-k4pq9, ServerIP: 10.244.3.49

服务部署 蓝绿发布、滚动更新 Pod部署类型:
蓝绿发布: 在旧版本的基础上 在新建一套新版本
优点:回滚方便 可以把新旧版本完全切换 缺点:因为需要重新创建一套服务,更新中需要会占用更多的系统资源,切换途中流量可能会中断

【02.kubernetes笔记|02.kubernetes笔记 Pod控制器(一) ReplicaSet】滚动更新: 新增一个新版Pod在删除一个旧版Pod; 或删除一个旧版Pod在新增一个新版Pod
优点:升级过程对系统资源需要更少; 可以保证流量不间断 缺点: 新旧版本同时存在,回滚麻烦

示例2:滚动发布
[root@k8s-master PodControl]# cat replicaset.demo.yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: replicaset-demo spec: minReadySeconds: 3 replicas: 2 selector: matchLabels: app: demoapp release: stable version: v1.0 template: metadata: labels: app: demoapp release: stable version: v1.0 test: test22 spec: containers: - name: demoapp image: ikubernetes/demoapp:v1.0 ports: - name: http containerPort: 80[root@k8s-master PodControl]# cat service-for-replicaset-demo.yaml#创建对应的svc 注意SVC标签需要能同时匹配新旧版本 apiVersion: v1 kind: Service metadata: name: demoapp namespace: default spec: type: ClusterIP clusterIP: 10.97.26.1 selector:#滚动升级 SVC使用的标签需要能同时匹配新旧版本 app: demoapp release: stable ports: - name: http port: 80 protocol: TCP targetPort: 80[root@k8s-master PodControl]# kubectl apply -f replicaset.demo.yaml-f service-for-replicaset-demo.yaml[root@k8s-master PodControl]# kubectl get pod NAMEREADYSTATUSRESTARTSAGE pod-188651/1Running016m replicaset-demo-d8jm91/1Running02m14s replicaset-demo-xtz2n1/1Running02m14siKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218! [root@k8s-master PodControl]# curl 10.97.26.1 iKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! [root@k8s-master PodControl]# curl 10.97.26.1

  • 别起一个终端创建Pod 用作测试
[root@k8s-master ~]# kubectl run pod-$RANDOM --image=ikubernetes/admin-box:latest -it --rm --command -- /bin/sh#创建一个Pod 用作测试 root@pod-18865 # while true; do curl --connect-timeout 1 demoapp.default.svc; sleep .2; done#访问测试 调度策略为轮询 1.0版本 iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204!

  • 新增ReplicaSet 使用ikubernetes/demoapp:v1.1版本
[root@k8s-master PodControl]# cat replicaset.demo-v1.1.yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: replicaset-demo-v1.1 spec: minReadySeconds: 3 replicas: 1 selector: matchLabels: app: demoapp release: stable version: v1.1 template: metadata: labels: app: demoapp release: stable version: v1.1 test: test22 spec: containers: - name: demoapp image: ikubernetes/demoapp:v1.1 ports: - name: http containerPort: 80[root@k8s-master PodControl]# kubectl apply -f replicaset.demo-v1.1.yaml replicaset.apps/replicaset-demo-v1.1 created[root@k8s-master PodControl]# kubectl get pod NAMEREADYSTATUSRESTARTSAGE pod-188651/1Running026m replicaset-demo-d8jm91/1Running112m replicaset-demo-v1.1-dhmlq1/1Running021s replicaset-demo-xtz2n1/1Running012m

  • 查看测试结果 SVC已经绑定到 1.1版本 新旧版本并存
iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218!

  • 修改老版本副本数
[root@k8s-master PodControl]# kubectl edit rs replicaset-demo spec: minReadySeconds: 3 replicas: 1 selector:[root@k8s-master PodControl]# kubectl get pod NAMEREADYSTATUSRESTARTSAGE pod-188651/1Running030m replicaset-demo-v1.1-dhmlq1/1Running06m22s replicaset-demo-xtz2n1/1Running016m

  • 查看测试结果 新旧版本并存 访问量各占一半
root@pod-18865 # while true; do curl --connect-timeout 1 demoapp.default.svc; sleep .2; done iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-xtz2n, ServerIP: 10.244.2.204! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219!

  • 继续更新 新版本新增一个Pod 老版本删一个Pod
[root@k8s-master PodControl]# kubectl edit rs replicaset-demo-v1.1#新版本副本数修改为2 replicaset.apps/replicaset-demo-v1.1 edited[root@k8s-master PodControl]# kubectl edit rs replicaset-demo#老版本副本数为0 replicaset.apps/replicaset-demo edited[root@k8s-master PodControl]# kubectl get pod NAMEREADYSTATUSRESTARTSAGE pod-188651/1Running034m replicaset-demo-v1.1-bnck81/1Running080s replicaset-demo-v1.1-dhmlq1/1Running010m

  • 查看测试结果 更新版本完成
Kubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-bnck8, ServerIP: 10.244.3.50! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-bnck8, ServerIP: 10.244.3.50! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: replicaset-demo-v1.1-dhmlq, ServerIP: 10.244.1.219!

示例3:蓝绿发布
envsubst使用环境变量替换文件内容 模板复用
  • 使用envsubst命令envsubst替换文件内容,默认kubernetes、YAML都是不支持变量的
[root@k8s-master PodControl]# cat replicaset-blue-gree.yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: rs-${DEPLOY} #为了使模板能复用 使用变量 spec: minReadySeconds: 3 replicas: 2 selector: matchLabels: app: demoapp ctr: rs-${DEPLOY} version: ${VERSION} template: metadata: labels: app: demoapp ctr: rs-${DEPLOY} version: ${VERSION} spec: containers: - name: demoapp image: ikubernetes/demoapp:${VERSION} ports: - name: http containerPort: 80[root@k8s-master PodControl]# DEPLOY=blue VERSION=v1.0 envsubst < replicaset-blue-gree.yaml #替换变量 apiVersion: apps/v1 kind: ReplicaSet metadata: name: rs-blue #应用变量值 spec: minReadySeconds: 3 replicas: 2 selector: matchLabels: app: demoapp ctr: rs-blue version: v1.0 template: metadata: labels: app: demoapp ctr: rs-blue version: v1.0 spec: containers: - name: demoapp image: ikubernetes/demoapp:v1.0 ports: - name: http containerPort: 80[root@k8s-master PodControl]# DEPLOY=blue VERSION=v1.0 envsubst < replicaset-blue-gree.yaml |kubectl apply -f -#创建SVC[root@k8s-master PodControl]# cat replicaset-blue-gree.yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: rs-${DEPLOY} #为了使模板能复用 使用变量 spec: minReadySeconds: 3 replicas: 2 selector: matchLabels: app: demoapp ctr: rs-${DEPLOY} version: ${VERSION} template: metadata: labels: app: demoapp ctr: rs-${DEPLOY} version: ${VERSION} spec: containers: - name: demoapp image: ikubernetes/demoapp:${VERSION} ports: - name: http containerPort: 80[root@k8s-master PodControl]# DEPLOY=blue VERSION=v1.0 envsubst < service-blue-green.yaml |kubectl apply -f - service/demoapp-svc created[root@k8s-master PodControl]# kubectl get svc NAMETYPECLUSTER-IPEXTERNAL-IPPORT(S)AGE demoappClusterIP10.97.26.180/TCP113m demoapp-svcClusterIP10.99.170.7780/TCP20s kubernetesClusterIP10.96.0.1443/TCP11

  • 测试
root@pod-18865 # while true; do curl --connect-timeout 1 demoapp-svc.default.svc; sleep .2; done iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205!#可以看到全部来自rs-blue iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205!

  • 新增rs用于更新发布
[root@k8s-master PodControl]# DEPLOY=greenVERSION=v1.1 envsubst < replicaset-blue-gree.yaml |kubectl apply -f - replicaset.apps/rs-green created[root@k8s-master PodControl]# kubectl get rs NAMEDESIREDCURRENTREADYAGE replicaset-demo00092m replicaset-demo-v1.122281m rs-blue22213m rs-green2208s[root@k8s-master PodControl]# kubectl get pod#等Pod全部准备就绪 NAMEREADYSTATUSRESTARTSAGE pod-188651/1Running0106m replicaset-demo-v1.1-bnck81/1Running073m replicaset-demo-v1.1-dhmlq1/1Running082m rs-blue-28lgc1/1Running014m rs-blue-gwnw71/1Running014m rs-green-d4t661/1Running040s rs-green-l75j71/1Running040s[root@k8s-master PodControl]# DEPLOY=greenVERSION=v1.1 envsubst < service-blue-green.yaml |kubectl apply -f - service/demoapp-svc configured

  • 查看测试结果
iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52!#完成版本更新 iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52!

  • 修改变量 版本回退
[root@k8s-master PodControl]# DEPLOY=blueVERSION=v1.0envsubst < service-blue-green.yaml |kubectl apply -f - service/demoapp-svc configured #查看测试结果 iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-d4t66, ServerIP: 10.244.1.222! iKubernetes demoapp v1.1 !! ClientIP: 10.244.1.217, ServerName: rs-green-l75j7, ServerIP: 10.244.3.52! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205!#完成版本回退 iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-28lgc, ServerIP: 10.244.1.220! iKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205!

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