一、K8S最常用命令如下：
1、获取pod信息：kubectl get pod
2、查看指定pod的日志信息：kubectl logs -f --tail(最后多少行) 500 podName(pod名)
3、查看pod的描述信息：kubectl describe pod podName
4、查看节点信息：kubectl get nodes
5、查看pod的详细信息，以yaml或者json格式展示：kubectl get pods -o yaml、kubectl get pods -o json
6、查看所有名称空间的pod：kubectl get pod -A
7、查看指定pod的环境变量：kubectl exec podName env
8、查看所有的service信息：kubectl get svc -A
9、查看集群资源（ComponentStatuses）信息：kubectl get cs
10、查看所有名称空间：kubectl get ns
11、查看集群信息：kubectl cluster-info 、kubectl cluster-info dump
12、进入pod容器：kubectl exec -it podName -n nsName /bin/sh 、kubectl exec -it podName -n nsName /bin/bash
13、删除指定的pod：kubectl delete pod podName
14、删除指定命名空间的pod：kubectl delete pod -n test podName
15、编辑资源：kubectl edit pod podName
16、获取pod详细信息：kubectl get pod -o wide
二、k8s操作命令详解：
1、基础操作命令
alias k=kubectl echo 'alias k=kubectl' >>~/.bashrc
kubectl get pods -o=json
kubectl get pods -o=yaml
kubectl get pods -o=wide
kubectl get pods -n=
kubectl create -f ./
kubectl logs -l name=
2、资源相关
kubectl create -f – Create objects.
kubectl create -f – Create objects in all manifest files in a directory.
kubectl create -f – Create objects from a URL.
kubectl delete -f – Delete an object.
3、集群相关
kubectl cluster-info – Display endpoint information about the master and services in the cluster.
kubectl version – Display the Kubernetes version running on the client and server.
kubectl config view – Get the configuration of the cluster.
kubectl config view -o jsonpath='{.users
.name}' – Get a list of users.
kubectl config current-context – Display the current context.
kubectl config get-contexts – Display a list of contexts.
kubectl config use-context – Set the default context.
kubectl api-resources – List the API resources that are available.
kubectl api-versions – List the API versions that are available. kubectl get all --all-namespaces
4、Daemonsets 相关
kubectl get daemonset – List one or more daemonsets.
kubectl edit daemonset – Edit and update the definition of one or more daemonset.
kubectl delete daemonset – Delete a daemonset.
kubectl create daemonset – Create a new daemonset.
kubectl rollout daemonset – Manage the rollout of a daemonset.
kubectl describe ds -n – Display the detailed state of daemonsets within a namespace.
5、Deployments相关
kubectl get deployment – List one or more deployments.
kubectl describe deployment – Display the detailed state of one or more deployments.
kubectl edit deployment – Edit and update the definition of one or more deployments on the server.
kubectl create deployment – Create a new deployment.
kubectl delete deployment – Delete deployments.
kubectl rollout status deployment – See the rollout status of a deployment.
kubectl set image deployment/ =image: – Perform a rolling update (K8S default), set the image of the container to a new version for a particular deployment.
kubectl rollout undo deployment/ – Rollback a previous deployment.
kubectl replace --force -f – Perform a replace deployment — Force replace, delete and then re-create the resource.
6、事件相关
kubectl get events – List recent events for all resources in the system.
kubectl get events –field-selector type=Warning – List Warnings only.
kubectl get events --sort-by=.metadata.creationTimestamp – List events sorted by timestamp.
kubectl get events --field-selector involvedObject.kind!=Pod – List events but exclude Pod events.
kubectl get events --field-selector involvedObject.kind=Node, involvedObject.name= – Pull events for a single node with a specific name.
kubectl get events --field-selector type!=Normal – Filter out normal events from a list of events.
7、日志相关
kubectl logs – Print the logs for a pod.
kubectl logs --since=6h – Print the logs for the last 6 hours for a pod.
kubectl logs --tail=50 – Get the most recent 50 lines of logs.
kubectl logs -f [-c ] – Get logs from a service and optionally select which container.
kubectl logs -f – Print the logs for a pod and follow new logs.
kubectl logs -c – Print the logs for a container in a pod.
kubectl logs pod.log – Output the logs for a pod into a file named ‘pod.log'.
kubectl logs --previous – View the logs for a previously failed pod.
8、Namespace 相关
kubectl create namespace – Create a namespace.
kubectl get namespace – List one or more namespaces.
kubectl describe namespace – Display the detailed state of one or more namespaces.
kubectl delete namespace – Delete a namespace.
kubectl edit namespace – Edit and update the definition of a namespace.
kubectl top namespace – Display Resource (CPU/Memory/Storage) usage for a namespace.
9、Nodes 相关
kubectl taint node – Update the taints on one or more nodes.
kubectl get node – List one or more nodes.
kubectl delete node – Delete a node or multiple nodes.
kubectl top node – Display Resource usage (CPU/Memory/Storage) for nodes.
kubectl get pods -o wide | grep – Pods running on a node.
kubectl annotate node – Annotate a node.
kubectl cordon node – Mark a node as unschedulable.
kubectl uncordon node – Mark node as schedulable.
kubectl drain node – Drain a node in preparation for maintenance.
kubectl label node – Add or update the labels of one or more nodes.
10、Pods 操作相关
kubectl get pod – List one or more pods.
kubectl get pods --sort-by='.status.containerStatuses[0].restartCount' – List pods Sorted by Restart Count.
kubectl get pods --field-selector=status.phase=Running – Get all running pods in the namespace.
kubectl delete pod – Delete a pod.
kubectl describe pod – Display the detailed state of a pods.
kubectl create pod – Create a pod.
kubectl exec -c – Execute a command against a container in a pod. Read more: Using Kubectl Exec: Connect to Your Kubernetes Containers
kubectl exec -it /bin/sh – Get an interactive shell on a single-container pod.
kubectl top pod – Display Resource usage (CPU/Memory/Storage) for pods.
kubectl annotate pod – Add or update the annotations of a pod.
kubectl label pods new-label= – Add or update the label of a pod.
kubectl get pods --show-labels – Get pods and show labels.
kubectl port-forward : – Listen on a port on the local machine and forward to a port on a specified pod.
11、Replication Controller 相关
kubectl get rc – List the replication controllers.
kubectl get rc --namespace=”” – List the replication controllers by namespace.
12、ReplicaSets 相关
kubectl get replicasets – List ReplicaSets.
kubectl describe replicasets – Display the detailed state of one or more ReplicaSets.
kubectl scale --replicas=[x] – Scale a ReplicaSet.
13、Sercrets 相关
kubectl create secret – Create a secret.
kubectl get secrets – List secrets.
kubectl describe secrets – List details about secrets.
kubectl delete secret – Delete a secret.
14、Services 相关
kubectl get services – List one or more services.
kubectl describe services – Display the detailed state of a service.
kubectl expose deployment [deployment_name] – Expose a replication controller, service, deployment, or pod as a new Kubernetes service.
kubectl edit services – Edit and update the definition of one or more services
15、Service Account相关
kubectl get serviceaccounts – List service accounts.
kubectl describe serviceaccounts – Display the detailed state of one or more service accounts.
kubectl replace serviceaccount – Replace a service account.
kubectl delete serviceaccount – Delete a service account
16、StatefulSets 相关
kubectl get statefulset – List StatefulSet
kubectl delete statefulset/[stateful_set_name] --cascade=false – Delete StatefulSet only (not pods).