快速使用k8s部署应用

使用nginx作为示例

使用kubectl 命令部署

部署deployment


kubectl create deployment nginx-deployment-kc --image=nginx --replicas=3 --port=80

部署service，向外暴露Nginx容器的端口


kubectl expose deployment nginx-deployment-kc --type=NodePort --port=80 --target-port=80

检查部署状态


kubectl get deployment  # 查看 Deployment 列表
kubectl get svc   # 查看 Service 列表


nginx-deployment-kc   NodePort    10.104.123.85   <none>        80:31165/TCP   12m

80:31165/TCP 31165就是svc对外暴露的端口，可以通过节点上任意节点ip+该端口访问pod

验证部署结果


 curl -X GET http://172.22.1.121:31165

使用yaml文件部署

部署deployment

touch nginx-deployment.yaml


# nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment-yaml  # Deployment 名称
spec:
  replicas: 3  # 副本数3个
  selector:
    matchLabels:
      app: nginx-deployment-yaml
  template:
    metadata:
      labels:
        app: nginx-deployment-yaml
    spec:
      containers:
      - name: my-nginx-c
        image: nginx  # nginx 镜像
        ports:
        - containerPort: 80  # 暴露端口

kubectl apply -f nginx-deployment.yaml

部署service

touch nginx-service.yaml


# nginx-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: nginx-service-yaml
spec:
  selector:
    app: nginx-deployment-yaml
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
  type: NodePort  # 类型是 NodePort

kubectl apply -f nginx-service.yaml

验证

验证方式同上

删除资源对象

kubectl delete deployment <deployment名称> kubectl delete svc <service名称>

yaml文件部署的对象删除


kubectl delete -f <YAML文件名>

部署Apache应用

touch apache-deployment.yaml


# nginx-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: test-apache-dep  # Deployment 名称
spec:
  replicas: 3  # 副本数3个
  selector:
    matchLabels:
      app: test-apache-dep
  template:
    metadata:
      labels:
        app: test-apache-dep
    spec:
      containers:
      - name: my-apache-dep
        image: httpd  # nginx 镜像
        ports:
        - containerPort: 80  # 暴露端口

touch apache-service.yaml


# nginx-service.yaml
apiVersion: v1
kind: Service
metadata:
  name: apache-service
spec:
  selector:
    app: test-apache-dep
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
  type: NodePort  # 类型是 NodePort

生成deployment模板

kubectl create deployment my-nginx-deploy --image=nginx --dry-run=client -o yaml > my-nginx-deployment.yaml