关于kubernetes:02kubernetes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，用来管制 Pod 的具体状态和行为

负责利用编排的控制器类型有如下几种:
ReplicationController:最晚期的Pod控制器;
RelicaSet: 正本集,负责管理一个利用(Pod）的多个正本;
Deployment: 部署，它不间接治理Pod，而是借助于ReplicaSet来治理Pod;最罕用的无状态利用控制器;
DaemonSet:守护过程集，用于确保在每个节点仅运行某个利用的一个Pod正本;
StatefulSet:性能相似于Deployment，但StatefulSet专用于编排有状态利用;
Job:有终止期限的一次性作业式工作，而非始终处于运行状态的服务过程;
CronJob:有终止期限的周期性作业式工作;

ReplicaSet 简介

ReplicationController 和 ReplicaSet
ReplicationController（RC）用来确保容器利用的正本数始终保持在用户定义的正本数，即如果有容器异样退
出，会主动创立新的 Pod 来代替；而如果异样多进去的容器也会主动回收；
在新版本的 Kubernetes 中倡议应用 ReplicaSet 来取代 ReplicationController 。ReplicaSet 跟
ReplicationController 没有实质的不同，只是名字不一样，并且 ReplicaSet 反对汇合式的 selector；
Pod控制器定义因素:
标签选择器;
冀望的正本数;
Pod模板;
ReplicaSet的更新机制:
删除式更新
比方:- set image:更新利用版本，但对于replicaset来说，仅能更新API Server中的定义理论运行Pod只能删除后重新启动才失效

Replicaset 字段阐明

apiversion: apps/v1kind: Replicasetmetadata:  name: ...  namespace: …spec:  minReadySeconds <integer>  #Pod就绪后多少秒内任一容器无crash方可视为“就绪”  replicas <integer> #冀望的Pod正本数,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[string]string> #map格局的标签选择器;和之前SVC的标签选择器为selector:相似  template: #Pod模板对象    metadata: #Pod对象元数据      labels: #由模板创立出的Pod对象所领有的标签，必须要可能匹配后面定义的标签选择器      spec:# Pod标准,格局同自主式Pod       ......

示例1：创ReplicaSet控制器

[root@k8s-master PodControl]# cat replicaset.demo.yaml apiVersion: apps/v1kind: ReplicaSetmetadata:  name: replicaset-demospec:  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下面的标签,能够比下面多但不能比下面少,因为实践上控制器如果匹配不到Pod 控制器会有限创立Pod,理论是建创时会报错        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 wideNAME                    DESIRED   CURRENT   READY   AGE   CONTAINERS   IMAGES                     SELECTORreplicaset-demo         2         2         2       30m   demoapp      ikubernetes/demoapp:v1.0   app=demoapp,release=stable,version=v1.0[root@k8s-master PodControl]# kubectl get pod -o wideNAME                          READY   STATUS    RESTARTS   AGE   IP             NODE        NOMINATED NODE   READINESS GATESmy-grafana-7d788c5479-4ztb7   1/1     Running   0          44m   10.244.1.208   k8s-node1   <none>           <none>replicaset-demo-b4hx9         1/1     Running   0          34m   10.244.1.210   k8s-node1   <none>           <none>replicaset-demo-zb7m5         1/1     Running   1          34m   10.244.2.203   k8s-node2   <none>           <none>#查看形容信息[root@k8s-master PodControl]# kubectl describe replicasets/replicaset-demoName:         replicaset-demoNamespace:    defaultSelector:     app=demoapp,release=stable,version=v1.0Labels:       <none>Annotations:  <none>Replicas:     2 current / 2 desired  #当初运行 /  冀望运行  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:  <none>    Mounts:       <none>  Volumes:        <none>Events:  Type    Reason            Age    From                   Message  ----    ------            ----   ----                   -------  Normal  SuccessfulCreate  8m28s  replicaset-controller  Created pod: replicaset-demo-b4hx9  Normal  SuccessfulCreate  8m28s  replicaset-controller  Created pod: replicaset-demo-zb7m5[root@k8s-master PodControl]# kubectl get pod replicaset-demo-zb7m5 -o yaml...ownerReferences:     #查看Pod受哪个管理器治理  - 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更新可应用kubectl set命令更新

[root@k8s-master PodControl]# kubectl set image --help   #查看set更新的相干案例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 hittingthe 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v1.1replicaset.apps/replicaset-demo image updat[root@k8s-master PodControl]# kubectl get pod -o wideNAME                          READY   STATUS    RESTARTS   AGE   IP             NODE        NOMINATED NODE   READINESS GATESmy-grafana-7d788c5479-4ztb7   1/1     Running   0          44m   10.244.1.208   k8s-node1   <none>           <none>replicaset-demo-b4hx9         1/1     Running   0          34m   10.244.1.210   k8s-node1   <none>           <none>replicaset-demo-zb7m5         1/1     Running   1          34m   10.244.2.203   k8s-node2   <none>           <none>[root@k8s-master PodControl]# kubectl get replicaset/replicaset-demo -o yaml|grep image      ...      - image: ikubernetes/demoapp:v1.1        imagePullPolicy: IfNotPresent#能够看到replicaset中的镜像信息曾经更新胜利[root@k8s-master PodControl]# kubectl get pods replicaset-demo-zb7m5 -o yaml  containerStatuses:  - 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 10.244.1.210iKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-b4hx9, ServerIP: 10.244.1.210!#理论拜访Pod 也并没有更新胜利 这是因为ReplicaSet为删除式更新 Pod删除重启后才会失效[root@k8s-master PodControl]# kubectl delete pod -l app=demoapp,release=stablepod "replicaset-demo-b4hx9" deletedpod "replicaset-demo-zb7m5" deleted[root@k8s-master PodControl]# kubectl get pod -o wideNAME                          READY   STATUS    RESTARTS   AGE     IP             NODE        NOMINATED NODE   READINESS GATESmy-grafana-7d788c5479-4ztb7   1/1     Running   0          57m     10.244.1.208   k8s-node1   <none>           <none>replicaset-demo-686fl         0/1     Running   1          2m28s   10.244.1.212   k8s-node1   <none>           <none>replicaset-demo-k4pq9         0/1     Running   0          2m28s   10.244.3.49    k8s-node3   <none>           <none>[root@k8s-master PodControl]# curl 10.244.3.49   #更新胜利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

服务部署蓝绿公布、滚动更新

Pod部署类型:
蓝绿公布: 在旧版本的根底上在新建一套新版本

     长处:回滚不便 能够把新旧版本齐全切换      毛病:因为须要从新创立一套服务,更新中须要会占用更多的系统资源,切换途中流量可能会中断

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

     长处:降级过程对系统资源须要更少;能够保障流量不间断     毛病: 新旧版本同时存在,回滚麻烦

示例2:滚动公布

[root@k8s-master PodControl]# cat replicaset.demo.yaml apiVersion: apps/v1kind: ReplicaSetmetadata:  name: replicaset-demospec:  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   #创立对应的svc 留神SVC标签须要能同时匹配新旧版本apiVersion: v1kind: Servicemetadata:  name: demoapp  namespace: defaultspec:  type: ClusterIP  clusterIP: 10.97.26.1  selector:    #滚动降级 SVC应用的标签须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 podNAME                    READY   STATUS    RESTARTS   AGEpod-18865               1/1     Running   0          16mreplicaset-demo-d8jm9   1/1     Running   0          2m14sreplicaset-demo-xtz2n   1/1     Running   0          2m14siKubernetes demoapp v1.0 !! ClientIP: 10.244.0.0, ServerName: replicaset-demo-d8jm9, ServerIP: 10.244.1.218![root@k8s-master PodControl]# curl 10.97.26.1iKubernetes 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

别起一个终端创立Pod 用作测试

[root@k8s-master ~]# kubectl run pod-$RANDOM --image=ikubernetes/admin-box:latest -it --rm --command -- /bin/sh   #创立一个Pod 用作测试root@pod-18865 # while true; do curl --connect-timeout 1 demoapp.default.svc; sleep .2;done      #拜访测试 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 应用ikubernetes/demoapp:v1.1版本

[root@k8s-master PodControl]# cat replicaset.demo-v1.1.yaml apiVersion: apps/v1kind: ReplicaSetmetadata:  name: replicaset-demo-v1.1spec:  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 podNAME                         READY   STATUS    RESTARTS   AGEpod-18865                    1/1     Running   0          26mreplicaset-demo-d8jm9        1/1     Running   1          12mreplicaset-demo-v1.1-dhmlq   1/1     Running   0          21sreplicaset-demo-xtz2n        1/1     Running   0          12m

查看测试后果 SVC曾经绑定到 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!

批改老版本正本数

[root@k8s-master PodControl]# kubectl edit rs replicaset-demospec:  minReadySeconds: 3  replicas: 1  selector:[root@k8s-master PodControl]# kubectl get podNAME                         READY   STATUS    RESTARTS   AGEpod-18865                    1/1     Running   0          30mreplicaset-demo-v1.1-dhmlq   1/1     Running   0          6m22sreplicaset-demo-xtz2n        1/1     Running   0          16m

查看测试后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;doneiKubernetes 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!

持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  #新版本正本数批改为2replicaset.apps/replicaset-demo-v1.1 edited[root@k8s-master PodControl]# kubectl edit rs replicaset-demo  #老版本正本数为0replicaset.apps/replicaset-demo edited[root@k8s-master PodControl]# kubectl get podNAME                         READY   STATUS    RESTARTS   AGEpod-18865                    1/1     Running   0          34mreplicaset-demo-v1.1-bnck8   1/1     Running   0          80sreplicaset-demo-v1.1-dhmlq   1/1     Running   0          10m

查看测试后果更新版本实现

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:蓝绿公布

envsubst应用环境变量替换文件内容模板复用

应用envsubst命令envsubst替换文件内容,默认kubernetes、YAML都是不反对变量的

[root@k8s-master PodControl]# cat replicaset-blue-gree.yaml apiVersion: apps/v1kind: ReplicaSetmetadata:  name: rs-${DEPLOY} #为了使模板能复用 应用变量spec:  minReadySeconds: 3  replicas: 2  selector:    matchLabels:      app: demoapp      ctr: rs-${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/v1kind: ReplicaSetmetadata:  name: rs-blue #利用变量值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 -   #创立SVC[root@k8s-master PodControl]# cat replicaset-blue-gree.yaml apiVersion: apps/v1kind: ReplicaSetmetadata:  name: rs-${DEPLOY} #为了使模板能复用 应用变量spec:  minReadySeconds: 3  replicas: 2  selector:    matchLabels:      app: demoapp      ctr: rs-${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 svcNAME          TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGEdemoapp       ClusterIP   10.97.26.1     <none>        80/TCP    113mdemoapp-svc   ClusterIP   10.99.170.77   <none>        80/TCP    20skubernetes    ClusterIP   10.96.0.1      <none>        443/TCP   11

测试

root@pod-18865 # while true; do curl --connect-timeout 1 demoapp-svc.default.svc; sleep .2;doneiKubernetes demoapp v1.0 !! ClientIP: 10.244.1.217, ServerName: rs-blue-gwnw7, ServerIP: 10.244.2.205!   #能够看到全副来自rs-blueiKubernetes 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用于更新公布

[root@k8s-master PodControl]# DEPLOY=green  VERSION=v1.1 envsubst < replicaset-blue-gree.yaml |kubectl apply -f -replicaset.apps/rs-green created[root@k8s-master PodControl]# kubectl get rsNAME                   DESIRED   CURRENT   READY   AGEreplicaset-demo        0         0         0       92mreplicaset-demo-v1.1   2         2         2       81mrs-blue                2         2         2       13mrs-green               2         2         0       8s[root@k8s-master PodControl]# kubectl get pod  #等Pod全副准备就绪NAME                         READY   STATUS    RESTARTS   AGEpod-18865                    1/1     Running   0          106mreplicaset-demo-v1.1-bnck8   1/1     Running   0          73mreplicaset-demo-v1.1-dhmlq   1/1     Running   0          82mrs-blue-28lgc                1/1     Running   0          14mrs-blue-gwnw7                1/1     Running   0          14mrs-green-d4t66               1/1     Running   0          40srs-green-l75j7               1/1     Running   0          40s[root@k8s-master PodControl]# DEPLOY=green  VERSION=v1.1 envsubst < service-blue-green.yaml |kubectl apply -f -service/demoapp-svc configured

查看测试后果

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!  #实现版本更新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!

批改变量版本回退

[root@k8s-master PodControl]# DEPLOY=blue  VERSION=v1.0  envsubst < service-blue-green.yaml |kubectl apply -f -service/demoapp-svc configured#查看测试后果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!  #实现版本回退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!

控制器简介

ReplicaSet 简介

Replicaset 字段阐明

示例1：创ReplicaSet控制器

服务部署 蓝绿公布、滚动更新

示例2:滚动公布

示例3:蓝绿公布

envsubst应用环境变量替换文件内容 模板复用

服务部署蓝绿公布、滚动更新

envsubst应用环境变量替换文件内容模板复用