『高级篇』docker之kubernetes基础集群命令小实战（35）

kubernetes接触命令

• kubectl version

• kubectl get nodes

• kubectl get pods

• 拉取官方的镜像

kubectl run kubernetes-bootcamp --image=jocatalin/kubernetes-bootcamp:v1 --port=8080

• 查看deploy的详细信息

kubectl describe  deploy kubernetes-bootcamp

• 查看pods的详细信息

kubectl describe  pods kubernetes-bootcamp-6b7849c495-xmmvh

• 如何访问刚才那个8080端口因为它在103那台机器上，可以通过apiserver的方式

kubectl proxy   

curl http://localhost:8001/api/v1/proxy/namespaces/default/pods/kubernetes-bootcamp-6b7849c495-xmmvh/

• 扩缩容

#如果需要从2 变成1 直接还用这个命令
kubectl scale deploy kubernetes-bootcamp --replicas=2
#可以看到在102运行了一个实例，在103在运行了一个实例
kubectl get pods -o wide

• 升级镜像

kubectl describe deploy kubernetes-bootcamp

#原来是v1升级为v2
kubectl  set image deploy kubernetes-bootcamp kubernetes-bootcamp=jocatalin/kubernetes-bootcamp:v2
kubectl describe deploy kubernetes-bootcamp

kubectl rollout status deploy kubernetes-bootcamp

kubectl rollout undo deploy kubernetes-bootcamp
#又变回v1了
kubectl describe deploy kubernetes-bootcamp

kubectl delete deploy kubernetes-bootcamp

配置文件

• yaml文件创建pod

mkdir services
cd services
vi nginx-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers: 
    - name: nginx
      image: nginx:1.7.9
      ports: 
        - containerPort: 80

kubectl create -f nginx-pod.yaml
#文件写明的创建pod，就不可能创建deploy
kubectl get deploy
kubectl get pods -o wide

#ip101启动代理
kubectl proxy
#ip101另一个窗口访问
curl http://localhost:8001/api/v1/proxy/namespaces/default/pods/nginx/

• yaml文件创建deployment

vi nginx-Deployment.yaml

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
          - containerPort: 80

kubectl create -f nginx-Deployment.yaml
kubectl get deploy
kubectl get pods -o wide
kubectl get pods -l app=nginx
kubectl get pods -l app=nginx -o wide

PS：常用的命令就说到这里吧，下次继续说说service和dns。