容器技术与应用实验指导书 实验14 kubectl常用命令使用

实验13Kubectl常用命令使用【实验要求】掌握Kubectl常用命令的使用。【实验环境】本任务选用3台部署在VMwareWorkstationpro16中的RHEL8.1虚拟机，已预先安装Kubernetes运行环境。各虚拟机基本配置信息如表13-1所示。表13-1各虚拟机基本配置信息主机名IP地址虚拟机CPU/内存节点角色k8s-master0/242vCPU/8GB管理节点k8s-node010/242vCPU/8GB工作节点1k8s-node020/242vCPU/8GB工作节点2【实验步骤】步骤1：可在master节点主机上运行下列命令，查看Kubernetes集群节点状态。#kubectlgetnodesNAME STATUS ROLES AGE VERSIONk8s-master Ready control-plane 120m v1.28.2k8s-node01 Ready <none> 118m v1.28.2k8s-node02 Ready <none> 118m v1.28.2步骤2：在master节点上创建nginx应用服务#kubectlcreatedeploymentnginx--image/basexxx/nginx:latestdeployment.apps/nginxcreated暴露端口。#kubectlexposedeploymentnginx--port=80--type=NodePortservice/nginxexposed查看Deployment的信息#kubectlgetdeployment NAME READY UP-TO-DATE AVAILABLE AGEnginx1/1 1 1 98获取Pod的详细信息#kubectlgetpod-owideNAME READY STATUS RESTARTS AGEIP NODEnginx-7854ff8877-r7flx 1/1 Running 0 2m node01从命令的返回信息来看，nginx服务部署在node01主机上。#kubectlgetsvc-owideNAME TYPE CLUSTER-IPEXTERNAL-IP PORT(S) AGE SELECTORkubernetesClusterIP

<none> 443/TCP 156m <none>nginx NodePort29

<none> 80:31679/TCP 9m34s app=nginx从命令的返回信息来看，主机对外暴露的端口号为31747。步骤4：访问nginx服务本步骤需截图至实训报告。打所示。图13-1访问nginx服务的效果步骤5：对nginx-deployment进行扩容和缩减操作（1）扩容操作。#kubectlscale--replicas=5deploymentnginxdeployment.apps/nginxscaled#kubectlgetpod-wNAME READY STATUS RESTARTS AGEnginx-7854ff8877-8s7vt 1/1 Running 0 22snginx-7854ff8877-hlxtq 1/1 Running 0 22snginx-7854ff8877-mcl6n 1/1 Running 0 22snginx-7854ff8877-r7flx 1/1 Running 0 10mnginx-7854ff8877-zn57b 1/1 Running 0 22s#kubectlgetdeploymentNAME DESIRED CURRENTUP-TO-DATE AVAILABLE AGEnginx 5 5 5 5 12m缩减操作。本步骤需截图至实训报告。#kubectlscale--replicas=3deploymentnginxdeployment.apps/nginxscaled#kubectlgetpod-wNAME READY STATUS RESTARTS AGEnginx-7854ff8877-hlxtq 1/1 Running 0 4m24snginx-7854ff8877-r7flx 1/1 Running 0 14mnginx-7854ff8877-zn57b 1/1 Running 0 4m24s#kubectlgetdeploymentNAME READY UP-TO-DATE AVAILABLE AGEnginx 3/3 3 3 11m步骤6：滚动升级本步骤需截图至实训报告。#kubectlsetimagedeploymentnginxnginx=/basexxx/nginx:1.15-alpine--recorddeployment.apps"nginx-deployment"imageupdated#kubectlgetpod-wNAME READY STATUS RESTARTS AGEnginx-c68594f4-bp7mc 1/1 Running 0 96snginx-c68594f4-hr6fp 1/1 Running 0 105snginx-c68594f4-jjr5z 1/1 Running 0 100s…#kubectldescribepodnginx-c68594f4-jjr5z…Events:

TypeReasonAgeFromMessage

-------------------------

NormalScheduled116sdefault-schedulerSuccessfullyassigneddefault/nginx-c68594f4-jjr5ztok8s-node01

NormalPulling115skubeletPullingimage"nginx:1.15-alpine"

NormalPulled112skubeletSuccessfullypulledimage"nginx:1.15-alpine"in3.035s(3.035sincludingwaiting)

NormalCreated112skubeletCreatedcontainernginx

NormalStarted112skubeletStartedcontainernginx从命令的返回信息可知，滚动升级已经完成。步骤7：回滚操作#kubectlrolloutundodeploymentnginxdeployment.apps/nginxrolledback#kubectlgetpod-wNAME READY STATUS RESTARTSAGEnginx-7854ff8877-7h94p 1/1 Running 0 45snginx-7854ff8877-lp947 1/1 Running 0 36snginx-7854ff8877-q9qpp 1/1 Running 0 41s#kubectldescribepodnginx-7854ff8877-q9qpp…Events:

TypeReasonAgeFromMessage

-------------------------

NormalScheduled67sdefault-schedulerSuccessfullyassigneddefault/nginx-7854ff8877-q9qpptok8s-node01

NormalPulling66skubeletPullingimage"nginx"

NormalPulled63skubeletSuccessfullypulledimage"nginx"in3.157s(3.157sincludingwaiting)

NormalCreated63skubeletCreatedcontainernginx

NormalStarted63skubeletStartedcontainernginx步骤8：清理环境（1）删除deployment和service。[root@master~]#ku