K8s命令使用（持续更新中）

Celia 字数: 5373 阅读耗时: 13 分钟 2024/05/19 2024/01/18 博客独享热度: 35 评论: 0

k8s常用命令

kubectl命令补全

yum -y install bash-completion
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc

token

kubeadm token create --print-join-command

常用命令类

查看集群信息:
```
kubectl cluster-info
```
获取所有namespace中的资源列表:
```
kubectl get all --all-namespaces
```

获取特定资源的列表 (如Pods, Services, Deployments等):

kubectl get pods
kubectl get services
kubectl get deployments

创建资源 (使用YAML文件):
```
kubectl apply -f <filename.yaml>
```
查看资源详细信息:
```
kubectl describe pod <pod-name>
```

删除资源:

kubectl delete -f <filename.yaml>
kubectl delete pod <pod-name>

编辑资源 (在默认编辑器中打开):

kubectl edit deployment <deployment-name>

查看Pod日志:
```
kubectl logs <pod-name>
```
执行Pod内的命令 (如进入容器内部):
```
kubectl exec -it <pod-name> -- /bin/bash
```

端口转发Pod端口到本地机器:

kubectl port-forward pod/<pod-name> <local-port>:<pod-port>

获取集群节点列表:
```
kubectl get nodes
```

Scale deployments (改变副本数量):

kubectl scale deployment <deployment-name> --replicas=<num-replicas>

滚动更新Deployment的镜像:

kubectl set image deployment/<deployment-name> <container-name>=<image>:<tag>

将新的Kubernetes配置文件应用到资源:
```
kubectl apply -f <filename.yaml>
```

回滚Deployment到之前的版本:

kubectl rollout undo deployment/<deployment-name>

查看资源的YAML配置:
```
kubectl get pod <pod-name> -o yaml
```
查看集群事件:
```
kubectl get events
```

查看或设置当前的Kubernetes上下文 (环境):

kubectl config current-context
kubectl config use-context <context-name>

为Pod设置标签:

kubectl label pods <pod-name> <label-key>=<label-value>

创建资源 (直接从命令行而不是YAML文件):
```
kubectl run <name> --image=<image>
```