kubectl 常用命令总结

0、kubectl 命令帮助

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# kubectl --help kubectl controls the Kubernetes cluster manager.    Find more information at: https://kubernetes.io/docs/reference/kubectl/overview/   Basic Commands (Beginner):   create         Create a resource from a file or from stdin.   expose         使用 replication controller, service, deployment 或者 pod 并暴露它作为一个新的Kubernetes Service   run            在集群中运行一个指定的镜像   set            为 objects 设置一个指定的特征   Basic Commands (Intermediate):   explain        查看资源的文档   get            显示一个或更多 resources   edit           在服务器上编辑一个资源   delete         Delete resources by filenames, stdin, resources and names, or by resources and label selector   Deploy Commands:   rollout        Manage the rollout of a resource   scale          为 Deployment, ReplicaSet, Replication Controller 或者 Job 设置一个新的副本数量   autoscale      自动调整一个 Deployment, ReplicaSet, 或者 ReplicationController 的副本数量   Cluster Management Commands:   certificate    修改 certificate 资源.   cluster-info   显示集群信息   top            Display Resource (CPU/Memory/Storage) usage.   cordon         标记 node 为 unschedulable   uncordon       标记 node 为 schedulable   drain          Drain node in preparation for maintenance   taint          更新一个或者多个 node 上的 taints   Troubleshooting and Debugging Commands:   describe       显示一个指定 resource 或者 group 的 resources 详情   logs           输出容器在 pod 中的日志   attach         Attach 到一个运行中的 container   exec           在一个 container 中执行一个命令   port-forward   Forward one or more local ports to a pod   proxy          运行一个 proxy 到 Kubernetes API server   cp             复制 files 和 directories 到 containers 和从容器中复制 files 和 directories.   auth           Inspect authorization   Advanced Commands:   diff           Diff live version against would-be applied version   apply          通过文件名或标准输入流(stdin)对资源进行配置   patch          使用 strategic merge patch 更新一个资源的 field(s)   replace        通过 filename 或者 stdin替换一个资源   wait           Experimental: Wait for a specific condition on one or many resources.   convert        在不同的 API versions 转换配置文件   Settings Commands:   label          更新在这个资源上的 labels   annotate       更新一个资源的注解   completion     Output shell completion code for the specified shell (bash or zsh)   Other Commands:   api-resources  Print the supported API resources on the server   api-versions   Print the supported API versions on the server, in the form of "group/version"   config         修改 kubeconfig 文件   plugin         Provides utilities for interacting with plugins.   version        输出 client 和 server 的版本信息   Usage:   kubectl [flags] [options]   Use "kubectl --help" for more information about a given command. Use "kubectl options" for a list of global command-line options (applies to all commands).

1、kubect create 创建一个资源从一个文件或标准输入

1 2	kubectl create deployment nginx --image=nginx:1.14   kubectl create -f my-nginx.yaml

2、kubectl run 在集群中运行一个指定的镜像

1	kubectl run nginx --image=nginx:1.16 --port=80 --replicas=1

3、kubectl expose 创建Service对象以将应用程序"暴露"于网络中

1	kubectl expose deployment/nginx  --type="NodePort" --port=80 --name=nginx

4、kubectl get 显示一个或更多resources资源

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kubectl get cs                          # 查看集群状态 kubectl get nodes                       # 查看集群节点信息 kubectl get ns                          # 查看集群命名空间 kubectl get svc -n kube-system          # 查看指定命名空间的服务 kubectl get pod -o wide      # 查看Pod详细信息 kubectl get pod -o yaml      # 以yaml格式查看Pod详细信息 kubectl get pods                        # 查看资源对象，查看所有Pod列表 kubectl get rc,service                  # 查看资源对象，查看rc和service列表 kubectl get pod,svc,ep --show-labels    # 查看pod,svc,ep能及标签信息 kubectl get all --all-namespaces        # 查看所有的命名空间

5、kubectl clster-info  显示集群信息

1	kubectl cluster-info            # 查看集群状态信息

6、kubectl describe 描述资源对象

1 2	kubectl describe nodes   # 显示Node的详细信息 kubectl describe pods/    # 显示Pod的详细信息

7、kubectl scale pod扩容与缩容

1 2	kubectl scale deployment nginx --replicas 5    # 扩容 kubectl scale deployment nginx --replicas 3    # 缩容

8、查看服务器上支持的API资源

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# kubectl api-resources NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND bindings                                                                      true         Binding componentstatuses                 cs                                          false        ComponentStatus configmaps                        cm                                          true         ConfigMap endpoints                         ep                                          true         Endpoints events                            ev                                          true         Event limitranges                       limits                                      true         LimitRange namespaces                        ns                                          false        Namespace nodes                             no                                          false        Node persistentvolumeclaims            pvc                                         true         PersistentVolumeClaim persistentvolumes                 pv                                          false        PersistentVolume pods                              po                                          true         Pod podtemplates                                                                  true         PodTemplate replicationcontrollers            rc                                          true         ReplicationController resourcequotas                    quota                                       true         ResourceQuota secrets                                                                       true         Secret serviceaccounts                   sa                                          true         ServiceAccount services                          svc                                         true         Service mutatingwebhookconfigurations                  admissionregistration.k8s.io   false        MutatingWebhookConfiguration validatingwebhookconfigurations                admissionregistration.k8s.io   false        ValidatingWebhookConfiguration customresourcedefinitions         crd,crds     apiextensions.k8s.io           false        CustomResourceDefinition apiservices                                    apiregistration.k8s.io         false        APIService controllerrevisions                            apps                           true         ControllerRevision daemonsets                        ds           apps                           true         DaemonSet deployments                       deploy       apps                           true         Deployment replicasets                       rs           apps                           true         ReplicaSet statefulsets                      sts          apps                           true         StatefulSet tokenreviews                                   authentication.k8s.io          false        TokenReview localsubjectaccessreviews                      authorization.k8s.io           true         LocalSubjectAccessReview selfsubjectaccessreviews                       authorization.k8s.io           false        SelfSubjectAccessReview selfsubjectrulesreviews                        authorization.k8s.io           false        SelfSubjectRulesReview subjectaccessreviews                           authorization.k8s.io           false        SubjectAccessReview horizontalpodautoscalers          hpa          autoscaling                    true         HorizontalPodAutoscaler cronjobs                          cj           batch                          true         CronJob jobs                                           batch                          true         Job certificatesigningrequests        csr          certificates.k8s.io            false        CertificateSigningRequest leases                                         coordination.k8s.io            true         Lease events                            ev           events.k8s.io                  true         Event daemonsets                        ds           extensions                     true         DaemonSet deployments                       deploy       extensions                     true         Deployment ingresses                         ing          extensions                     true         Ingress networkpolicies                   netpol       extensions                     true         NetworkPolicy podsecuritypolicies               psp          extensions                     false        PodSecurityPolicy replicasets                       rs           extensions                     true         ReplicaSet ingresses                         ing          networking.k8s.io              true         Ingress networkpolicies                   netpol       networking.k8s.io              true         NetworkPolicy runtimeclasses                                 node.k8s.io                    false        RuntimeClass poddisruptionbudgets              pdb          policy                         true         PodDisruptionBudget podsecuritypolicies               psp          policy                         false        PodSecurityPolicy clusterrolebindings                            rbac.authorization.k8s.io      false        ClusterRoleBinding clusterroles                                   rbac.authorization.k8s.io      false        ClusterRole rolebindings                                   rbac.authorization.k8s.io      true         RoleBinding roles                                          rbac.authorization.k8s.io      true         Role priorityclasses                   pc           scheduling.k8s.io              false        PriorityClass csidrivers                                     storage.k8s.io                 false        CSIDriver csinodes                                       storage.k8s.io                 false        CSINode storageclasses                    sc           storage.k8s.io                 false        StorageClass volumeattachments                              storage.k8s.io                 false        VolumeAttachment

9、生成yaml资源配置文件方法

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# 用run命令生成yaml文件 kubectl create deployment nginx --image=nginx:1.14 -o yaml --dry-run > my.deploy.yaml   # 用get命令导出yaml文件 kubectl get deploy nginx-deployment -o yaml --export > my.deploy.yaml   # Pod容器的字段拼写忘记了 kubectl explain pods.spec.containers