k8s kubectl操作指南

1. kubectl get pods 查看pods：

[root@master ~]# kubectl get pods -l app=nginx
NAME READY STATUS RESTARTS AGE
nginx-deployment-7fc9b7bd96-8tt2g 1/1 Running 5 155d
nginx-deployment-7fc9b7bd96-cmt2g 1/1 Running 5 155d

[root@master ~]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-78fcdf6894-csv59 1/1 Running 9 175d
coredns-78fcdf6894-zpg62 1/1 Running 9 175d
etcd-master 1/1 Running 9 175d
kube-apiserver-master 1/1 Running 9 175d
kube-controller-manager-master 1/1 Running 9 175d
kube-proxy-bzv8m 1/1 Running 9 175d
kube-proxy-mnjb6 1/1 Running 0 40m
kube-scheduler-master 1/1 Running 9 175d
kubernetes-dashboard-767dc7d4d-kbhjq 1/1 Running 8 174d
weave-net-2ftfr 1/2 CrashLoopBackOff 11 40m
weave-net-pm6k4 2/2 Running 7 103d

2. 应用yaml文件创建，更新pods：

kubectl apply -f nginx-deployment-volume.yaml

[root@master ~]# cat nginx-deployment-volume.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  selector:
    matchLabels:
      app: nginx
  replicas: 2
  template:
    metadata:
      labels:
     app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.8
        ports:
        - containerPort: 80
        volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: nginx-vol
      volumes:
      - name: nginx-vol
        hostPath:
          path: /var/data

3. 删除yaml的pods：

kubectl delete -f nginx-deployment-volume.yaml