三. k8s基本操作

development service pod关系

kubectl常用命令

kubectl cluster-info #查看集群信息

kubectl describe pod -n kube-system kube-flannel-ds-amd64-trpqq #查看pod的描述信息

kubectl get pods -n kube-system #查看指定命名空间的pod

kubectl create deployment NAME --image=image [--dry-run] [options] #创建deployment, dry-run为true就是测试不执行

kubectl expose deployment nginx-deploy --name=nginx --port=80 --target-port=80 --protocol=TCP

#为deployment创建service, --name为service的名字, --port为暴露端口, --target-port为目标pod端口

dig -t A nginx.default.svc.cluster.local @10.96.0.10 #验证是否能正确解析service, @后边的ip为k8s的dns地址

kubectl describe svc nginx #描述service

kubectl get pods --show-labels #查看pod的标签

kubectl scale deployment nginx-deploy --replicas=3 #扩容或缩容, --replicas为数量

wget -O - -q nginx-deploy

kubectl rollout undo deployment myapp-deploy --to-revision=1 #回滚到指定版本, 默认回滚到上一版本

kubectl explain pod

资源清单配置

apiVersion: v1
kind: Pod
metadata:
  name: pod-demo
  namespace: default
  labels:
    app: myapp
    tier: frontend
spec:
  containers:
  - name: myapp
    image: ikubernetes/myapp:v1
  - name: busybox
    image: busybox
    command:
    - "/bin/sh"
    - "-c"
    - "sleep 5"

kubectl create -f test.yaml

kubectl delete -f test.yaml

kubectl describe pod pod-demo

kubectl describe pod pod-demo

kubectl exec -it pod-demo -c myapp -- /bin/sh

https://blog.csdn.net/ucsheep/article/details/81781509