k8s命令集

https://www.kubernetes.org.cn/docs
http://docs.kubernetes.org.cn/70.html
http://docs.kubernetes.org.cn/683.html
https://kubernetes.io/zh/docs/tasks/access-application-cluster/_print/

查看信息

kubectl version
kubectl api-versions
kubectl api-resources -o wide --namespaced=true
kubectl api-resources -o wide --namespaced=false

基本概念

master 主控
node 节点，理解为虚拟机、物理机
pod 一个或多个container组成，这些容器共享pod的ip，共享pod数据卷
container 容器
service，svc 服务，一个或多个pod组成的对外访问的接口
endpoint
deployment deploy
namespace ns 命名空间
volume 数据卷
replicaSet RC, pod的副本集数量
job
label
selector

-----------------------------
kube-apiserver
kube-controller-manger
kube-scheduler

kubelet
kube-proxy

安装ping ifconfig ps命令

apt-get update
apt-get install -y net-tools
apt install -y iputils-ping
apt-get -y install procps
apt-get -y install vim
apt-get -y install dnsutils

kubectl get命令

kubectl get all --all-namespaces
kubectl get po -A
kubectl get po -n kube-system
kubectl get po x -o yaml
kubectl get pod pod-name
kubectl get pod/pod-name

kubectl get nodes -o wide
kubectl get pods -o wide
kubectl get svc -o wide
kubectl get deploy -o wide
kubectl get ns
kubectl get cs
kubectl get rs
kubectl get cm
kubectl get ep my-service #获取服务的endpoint端点信息
-l 指定label筛选
-o 指定输出方式 yaml, json
-w watch，监视pod变化

kubectl delete命令

强制删除使用 --force --grace-period=0
kubectl delete pod pod-name
kubectl delete pod/nginx-701339712-xqzcx
kubectl delete svc svc-name
kubectl delete deploy deploy-name
kubectl delete ns ns-name

如果是通过yaml创建的，删除也可用
kubectl create -f x.yaml
kubectl apply -f my-service.yaml
kubectl delete -f my-service.yaml

kubectl edit命令

kubectl edit deploy deploy-name

kubectl expose命令

 kubectl expose deployment static-web --port=88 --target-port=80 --type=NodePort 

kubectl exec命令

 kubectl exec -it podname bash
 kubectl exec podname -- ls
 kubectl exec -it podname -c service bash

kubectl describe命令

 kubectl describe po podname 
 kubectl describe deploy deployxx
 kubectl describe ns nx

kubectl logs命令

 kubectl logs podname 
 kubectl logs podname  --tail=10
 kubectl logs -f podname -c service
 kubectl logs -f podname -c service --tail=10

kubectl scale命令

 kubectl scale deploy d --replicas=0

[root@localhost ~]# kubectl create deploy nginx --image=nginx --dry-run=client -o yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: nginx
  name: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        imagePullPolicy: IfNotpresent
        name: nginx
        resources: {}
status: {}