k8s入门操作

https://kubernetes.io/zh/docs/concepts/workloads/pods/#pods-and-controllers

我们先删除 之前安装过的副本

kubectk get all
kubectl delete deployment.apps/tomcat6
kubectl delete pod/tomcat6-new 

先部署一个tomcat

kubectl create deployment tomcat6 --image=tomcat:6.0.53-jre8 --dry-run -o yaml > tomcat6-deployment.yaml

vi  tomcat6-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: tomcat6
  name: tomcat6
spec:
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: tomcat6
  name: tomcat6
spec:
  replicas: 3
  selector:
    matchLabels:
      app: tomcat6
  template:
    metadata:
      labels:
        app: tomcat6
    spec:
      containers:
      - image: tomcat:6.0.53-jre8
        name: tomcat                   

使用yml部署方式
kubectl apply -f tomcat6-deployment.yaml

 

部署成功

 

 

 

 

 

kubectl expose deployment tomcat6 --port=80 --target-port=8080 --type=NodePort --dry-run -o yaml

我们将下面这段代码复制到

apiVersion: v1
kind: Service
metadata:
  creationTimestamp: null
  labels:
    app: tomcat6
  name: tomcat6
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: tomcat6

  type: NodePort

vi tomcat6-deployment.yaml

 

 

 

我们将之前的部署删除
kubectl get all
kubectl delete deployment.apps/tomcat6

重新部署tomcat6
kubectl apply -f tomcat6-deployment.yaml

 

 

 ----

Ingress  可以实现基于域名的访问  如果其中一个pod宕机了 可以对外是透明的  负载均衡

 

 kubectl apply -f ingress-controller.yaml

 

 

 

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: web
spec:
  rules:
  - host: tomcat6.lcc.com
    http:
      paths:
        - backend:
            serviceName: tomcat6
            servicePort: 80

 

 我们在window  hosts文件中修改域名访问