368 lines
6.5 KiB
Markdown
368 lines
6.5 KiB
Markdown
Kubernetes 备忘清单
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===
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查看资源信息
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---
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### 节点
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资源名称: nodes, 缩写: no
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```bash
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$ kubectl get no # 显示所有节点信息
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# 显示所有节点的更多信息
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$ kubectl get no -o wide
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$ kubectl describe no # 显示节点详情
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# 以yaml格式，显示节点详情
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$ kubectl get no -o yaml
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# 筛选指定标签的节点
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$ kubectl get node --selector=[label_name]
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# 输出 jsonpath 表达式定义的字段信息
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$ kubectl get nodes -o jsonpath='{.items[*].status.addresses[?(@.type=="ExternalIP")].address}'
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# 显示节点(CPU/内存/存储)使用情况
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$ kubectl top node [node_name]
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```
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### 容器组
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<!--rehype:wrap-class=col-span-2-->
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资源名称: pods, 缩写: po
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```bash
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$ kubectl get po # 显示所有容器组信息
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$ kubectl get po -o wide
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$ kubectl describe po
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$ kubectl get po --show-labels # 查看容器组的labels
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$ kubectl get po -l app=nginx
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$ kubectl get po -o yaml
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$ kubectl get pod [pod_name] -o yaml --export
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$ kubectl get pod [pod_name] -o yaml --export > nameoffile.yaml
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# 以yaml格式导出容器组信息到yaml文件
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$ kubectl get pods --field-selector status.phase=Running
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# 使用字段选择器筛选出容器组信息
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```
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### 命名空间
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资源名称: `namespaces`, 缩写: `ns`
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```bash
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$ kubectl get ns
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$ kubectl get ns -o yaml
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$ kubectl describe ns
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```
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### 无状态
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资源名称: `deployments`, 缩写: `deploy`
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```bash
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$ kubectl get deploy
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$ kubectl describe deploy
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$ kubectl get deploy -o wide
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$ kubectl get deploy -o yaml
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```
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### 服务
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资源名称: `services`, 缩写: `svc`
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```bash
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$ kubectl get svc
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$ kubectl describe svc
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$ kubectl get svc -o wide
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$ kubectl get svc -o yaml
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$ kubectl get svc --show-labels
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```
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### 守护进程集
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<!--rehype:wrap-class=col-span-2-->
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资源名称: `daemonsets`, 缩写: `ds`
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```bash
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$ kubectl get ds
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$ kubectl describe ds --all-namespaces
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$ kubectl describe ds [daemonset_name] -n [namespace_name]
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$ kubectl get ds [ds_name] -n [ns_name] -o yaml
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```
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### 事件
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资源名称: `events`, 缩写: `ev`
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```bash
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$ kubectl get events
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$ kubectl get events -n kube-system
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$ kubectl get events -w
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```
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### 服务帐户
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<!--rehype:wrap-class=col-span-2-->
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资源名称: `serviceaccounts`, 缩写: `sa`
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```bash
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$ kubectl get sa
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$ kubectl get sa -o yaml
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$ kubectl get serviceaccounts default -o yaml >./sa.yaml
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$ kubectl replace serviceaccount default -f ./sa.yaml
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```
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### 日志
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```bash
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$ kubectl logs [pod_name]
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$ kubectl logs --since=1h [pod_name]
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$ kubectl logs --tail=20 [pod_name]
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$ kubectl logs \
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-f -c [container_name] [pod_name]
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$ kubectl logs [pod_name] > pod.log
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```
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### 副本集
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资源名称: replicasets, 缩写: rs
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```bash
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$ kubectl get rs
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$ kubectl describe rs
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$ kubectl get rs -o wide
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$ kubectl get rs -o yaml
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```
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### 角色
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```bash
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$ kubectl get roles --all-namespaces
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```
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---
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```
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$ kubectl get roles \
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--all-namespaces -o yaml
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```
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### 保密字典
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```bash
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$ kubectl get secrets
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$ kubectl get secrets --all-namespaces
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$ kubectl get secrets -o yaml
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```
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### 配置项
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资源名称: configmaps, 缩写: cm
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```bash
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$ kubectl get cm
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$ kubectl get cm --all-namespaces
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$ kubectl get cm --all-namespaces -o yaml
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```
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### 路由
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资源名称: ingresses, 缩写: ing
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```bash
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$ kubectl get ing
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$ kubectl get ing --all-namespaces
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```
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### 持久卷
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资源名称: persistentvolumes, 缩写: pv
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```bash
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$ kubectl get pv
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$ kubectl describe pv
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```
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### 持久卷声明
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资源名称: persistentvolumeclaims, 缩写: pvc
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```bash
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$ kubectl get pvc
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$ kubectl describe pvc
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```
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### 存储类
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资源名称: storageclasses, 缩写: sc
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```bash
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$ kubectl get sc
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$ kubectl get sc -o yaml
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```
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### 多个资源
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```bash
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$ kubectl get svc, po
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$ kubectl get deploy, no
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$ kubectl get all
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$ kubectl get all --all-namespaces
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```
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变更资源属性
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---
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### 污点
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```bash
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$ kubectl taint [node_name] [taint_name]
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```
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### 标签
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<!--rehype:wrap-class=col-span-2-->
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```bash
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$ kubectl label nodes <node-name> <label-key>=<label-value> #增加
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$ kubectl label nodes <node-name> <label-key>- #删除
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$ kubectl label nodes <node-name> <label-key>=<label-value> --overwrite #修改
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```
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### 维护/可调度
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```bash
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$ kubectl cordon [node_name] # 节点维护
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$ kubectl uncordon [node_name] # 节点可调度
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```
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### 清空节点
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```bash
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$ kubectl drain [node_name] # 清空节点
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```
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### 节点/容器组
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```bash
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$ kubectl delete node [node_name]
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$ kubectl delete pod [pod_name]
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$ kubectl edit node [node_name]
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$ kubectl edit pod [pod_name]
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```
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### 无状态/命名空间
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<!--rehype:wrap-class=col-span-2 row-span-2-->
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```bash
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$ kubectl edit deploy [deploy_name]
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$ kubectl delete deploy [deploy_name]
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$ kubectl expose deploy [deploy_name] --port=80 --type=NodePort
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$ kubectl scale deploy [deploy_name] --replicas=5
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$ kubectl delete ns
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$ kubectl edit ns [ns_name]
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```
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### 服务
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```bash
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$ kubectl edit svc [svc_name]
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$ kubectl delete svc [svc_name]
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```
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### 守护进程集
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```bash
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$ kubectl edit ds [ds_name] -n kube-system
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$ kubectl delete ds [ds_name]
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```
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### 服务账号
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```bash
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$ kubectl edit sa [sa_name]
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$ kubectl delete sa [sa_name]
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```
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### 注释
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<!--rehype:wrap-class=col-span-2-->
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```bash
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$ kubectl annotatepo [pod_name] [annotation]
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$ kubectl annotateno [node_name]
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```
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添加资源
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---
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### 创建容器组
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<!--rehype:wrap-class=col-span-2-->
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```bash
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$ kubectl create -f [name_of_file]
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$ kubectl apply -f [name_of_file]
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$ kubectl run [pod_name] --image=nginx --restart=Never
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$ kubectl run [pod_name] --generator=run-pod/v1 --image=nginx
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$ kubectl run [pod_name] --image=nginx --restart=Never
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```
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### 创建服务
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```bash
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$ kubectl create svc nodeport [svc_name] \
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--tcp=8080:80
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```
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### 创建无状态应用
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```bash
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$ kubectl create -f [name_of_file]
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$ kubectl apply -f [name_of_file]
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$ kubectl create deploy [deploy_name] \
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--image=nginx
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```
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### 输出YAML文件
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<!--rehype:wrap-class=col-span-2-->
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```bash
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$ kubectl create deploy [deploy_name] --image=nginx --dry-run -o yaml > deploy.yaml
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$ kubectl get po [pod_name] -o yaml --export > pod.yaml
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$ kubectl run nginx --image=nginx:alpine --dry-run -o -yaml > deploy.yaml
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```
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### 容器交互
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```bash
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$ kubectl run [pod_name] \
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--image=busybox --rm -it \
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--restart=Never -- sh
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```
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### 获取帮助
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```bash
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$ kubectl -h
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$ kubectl create -h
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$ kubectl run -h
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$ kubectl explain deploy.spec
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```
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请求
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---
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### API调用
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```bash
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$ kubectl get --raw /apis/metrics.k8s.io/
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```
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### 集群信息
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```bash
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$ kubectl config
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$ kubectl cluster-info
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$ kubectl get componentstatus
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```
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另见
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---
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- [Kubernetes 官方文档 命令行工具 (kubectl)](https://kubernetes.io/zh-cn/docs/reference/kubectl/) _(kubernetes.io)_
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