K8s-Commands
一、K8S最常用命令如下：
- 获取pod信息：
kubectl get pod - 查看指定pod的日志信息：
kubectl logs -f --tail(最后多少行) 500 podName(pod名) - 查看pod的描述信息：
kubectl describe pod podName - 查看节点信息：
kubectl get nodes - 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 - 查看所有名称空间的pod：
kubectl get pod -A - 查看指定pod的环境变量：
kubectl exec podName env - 查看所有的service信息：
kubectl get svc -A - 查看集群资源（ComponentStatuses）信息：
kubectl get cs - 查看所有名称空间：
kubectl get ns - 查看集群信息：
kubectl cluster-info、kubectl cluster-info dump - 进入pod容器：
kubectl exec -it podName -n nsName /bin/sh、kubectl exec -it podName -n nsName /bin/bash - 删除指定的pod：
kubectl delete pod podName - 删除指定命名空间的pod：
kubectl delete pod -n test podName - 编辑资源：
kubectl edit pod podName - 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=<namespace_name>
kubectl create -f ./
kubectl logs -l name=
2、资源相关
# Create objects.
kubectl create -f k8s.yaml
# Create objects in all manifest files in a directory.
kubectl create -f .
# Create objects from a URL.
kubectl create -f <'url'>
# Delete an object.
kubectl delete -f k8s.yaml
3、集群相关
# Display endpoint information about the master and services in the cluster.
kubectl cluster-info
# Display the Kubernetes version running on the client and server.
kubectl version
# Get the configuration of the cluster.
kubectl config view
# Get a list of users.
kubectl config view -o jsonpath='{.users[*].name}'
# Display the current context.
kubectl config current-context
# Display a list of contexts.
kubectl config get-contexts
# Set the default context.
kubectl config use-context
# List the API resources that are available.
kubectl api-resources
# List the API versions that are available. kubectl get all --all-namespaces
kubectl api-versions
4、Daemonsets 相关
# List one or more daemonsets.
kubectl get daemonset
# Edit and update the definition of one or more daemonset.
kubectl edit daemonset <daemonset_name>
# Delete a daemonset.
kubectl delete daemonset <daemonset_name>
# Create a new daemonset.
kubectl create daemonset <daemonset_name>
# Manage the rollout of a daemonset.
kubectl rollout daemonset
# Display the detailed state of daemonsets within a namespace.
kubectl describe ds <daemonset_name> -n <namespace_name>
5、Deployments相关
# List one or more deployments.
kubectl get deployment
# Display the detailed state of one or more deployments.
kubectl describe deployment <deployment_name>
# Edit and update the definition of one or more deployments on the server.
kubectl edit deployment <deployment_name>
# Create a new deployment.
kubectl create deployment <deployment_name>
# Delete deployments.
kubectl delete deployment <deployment_name>
# See the rollout status of a deployment.
kubectl rollout status deployment <deployment_name>
# Perform a rolling update (K8S default), set the image of the container to a new version for a particular deployment.
kubectl set image deployment/ =image:
# Rollback a previous deployment.
kubectl rollout undo deployment/
# Perform a replace deployment — Force replace, delete and then re-create the resource.
kubectl replace --force -f
6、事件相关
# List recent events for all resources in the system.
kubectl get events
# List Warnings only.
kubectl get events –field-selector type=Warning
# List events sorted by timestamp.
kubectl get events --sort-by=.metadata.creationTimestamp
# List events but exclude Pod events.
kubectl get events --field-selector involvedObject.kind!=Pod
# Pull events for a single node with a specific name.
kubectl get events --field-selector involvedObject.kind=Node, involvedObject.name=<node_name>
# Filter out normal events from a list of events.
kubectl get events --field-selector type!=Normal
7、日志相关
# Print the logs for a pod.
kubectl logs <pod_name>
# Print the logs for the last 6 hours for a pod.
kubectl logs --since=6h <pod_name>
# Get the most recent 50 lines of logs.
kubectl logs --tail=50 <pod_name>
# Get logs from a service and optionally select which container.
kubectl logs -f <service_name> [-c <$container>]
# Print the logs for a pod and follow new logs.
kubectl logs -f <pod_name>
# Print the logs for a container in a pod.
kubectl logs -c <container_name> <pod_name>
# Output the logs for a pod into a file named ‘pod.log'.
kubectl logs <pod_name> pod.log
# View the logs for a previously failed pod.
kubectl logs --previous <pod_name>
8、Namespace 相关
# Create a namespace.
kubectl create namespace <namespace_name>
# List one or more namespaces.
kubectl get namespace <namespace_name>
# Display the detailed state of one or more namespaces.
kubectl describe namespace <namespace_name>
# Delete a namespace.
kubectl delete namespace <namespace_name>
# Edit and update the definition of a namespace.
kubectl edit namespace <namespace_name>
# Display Resource (CPU/Memory/Storage) usage for a namespace.
kubectl top namespace <namespace_name>
9、Nodes 相关
# Update the taints on one or more nodes.
kubectl taint node <node_name>
# List one or more nodes.
kubectl get node
# Delete a node or multiple nodes.
kubectl delete node <node_name>
# Display Resource usage (CPU/Memory/Storage) for nodes.
kubectl top node <node_name>
# Pods running on a node.
kubectl get pods -o wide | grep <node_name>
# Annotate a node.
kubectl annotate node <node_name>
# Mark a node as unschedulable.
kubectl cordon node <node_name>
# Mark node as schedulable.
kubectl uncordon node <node_name>
# Drain a node in preparation for maintenance.
kubectl drain node <node_name>
# Add or update the labels of one or more nodes.
kubectl label node
10、Pods 操作相关
# List one or more pods.
kubectl get pod
# List pods Sorted by Restart Count.
kubectl get pods --sort-by='.status.containerStatuses[0].restartCount'
# Get all running pods in the namespace.
kubectl get pods --field-selector=status.phase=Running
# Delete a pod.
kubectl delete pod <pod_name>
# Display the detailed state of a pods.
kubectl describe pod <pod_name>
# Create a pod.
kubectl create pod <pod_name>
# Execute a command against a container in a pod. Read more: Using Kubectl Exec: Connect to Your Kubernetes Containers
kubectl exec <pod_name> -c <container_name>
# Get an interactive shell on a single-container pod.
kubectl exec -it <pod_name> /bin/sh
# Display Resource usage (CPU/Memory/Storage) for pods.
kubectl top pod
# Add or update the annotations of a pod.
kubectl annotate pod <pod_name>
# Add or update the label of a pod.
kubectl label pods <pod_name> new-label=
# Get pods and show labels.
kubectl get pods --show-labels
# Listen on a port on the local machine and forward to a port on a specified pod.
kubectl port-forward :
11、Replication Controller 相关
# List the replication controllers.
kubectl get rc
# List the replication controllers by namespace.
kubectl get rc --namespace=<namespace_name>
12、ReplicaSets 相关
# List ReplicaSets.
kubectl get replicasets
# Display the detailed state of one or more ReplicaSets.
kubectl describe replicasets <replicaset_name>
# Scale a ReplicaSet.
kubectl scale --replicas=[x]
13、Sercrets 相关
# Create a secret.
kubectl create secret
# List secrets.
kubectl get secrets
# List details about secrets.
kubectl describe secrets
# Delete a secret.
kubectl delete secret <secret_name>
14、Services 相关
# List one or more services.
kubectl get services
# Display the detailed state of a service.
kubectl describe services
# Expose a replication controller, service, deployment, or pod as a new Kubernetes service.
kubectl expose deployment [deployment_name]
# Edit and update the definition of one or more services
kubectl edit services
15、Service Account相关
# List service accounts.
kubectl get serviceaccounts
# Display the detailed state of one or more service accounts.
kubectl describe serviceaccounts
# Replace a service account.
kubectl replace serviceaccount
# Delete a service account
kubectl delete serviceaccount <service_account_name>
16、StatefulSets 相关
# List StatefulSet
kubectl get statefulset
# Delete StatefulSet only (not pods).
kubectl delete statefulset/[stateful_set_name] --cascade=false