pod （第一个pod）-端口映射

Pod多容器运行，环境变量传递，镜像下载策略，镜像拉取策略，容器资源限制，端口映射及故障排查命令基础

- 资源清单编写，需要使用"kubectl explain"文档查看，及官方文档查看说明;
- 环境变量传递
- 多容器启动
- 镜像下载策略
- 容器重启策略
- 资源限制
- 端口映射
- K8S故障排查技巧

- 容器的类型:
	- 基础架构容器
	- 业务容器
	- 初始化容器

在K8S集群部署MySQL服务 demon

cat 03-pods-wordpress.yaml

apiVersion: v1
kind: Pod
metadata:
  name: baimei-wp
spec:
  containers: 
  - name: db
    image: harbor.baimei.com/baimei-db/mysql:5.7
    # 向容器传递环境变量
    env:
      # 变量的名称
    - name: MYSQL_ALLOW_EMPTY_PASSWORD
      # 指定变量的值
      value: "yes"
    - name: MYSQL_DATABASE
      value: "wordpress"
    - name: MYSQL_USER
      value: "admin"
    - name: MYSQL_PASSWORD
      value: "baimei"

3.创建资源

kubectl apply -f 03-pods-wordpress.yaml

4.查看资源

 kubectl get pods

5.验证Pod

kubectl exec -it baimei-wp -- mysql

二、端口映射

apiVersion: v1
kind: Pod
metadata:
  name: baimei-ports-01
spec:
  # hostNetwork: true
  nodeName: worker233
  containers: 
  - name: db
    image: harbor.baimei.com/baimei-db/mysql:5.7
    # 指定pod的端口映射信息
    ports:
      # 容器的端口号
    - containerPort: 3306
      # 容器绑定到宿主机的IP地址，若不写表示"0.0.0.0"
      hostIP: 10.0.0.233
      # 映射的主机端口
      hostPort: 13306
      # 给服务起名字，要求唯一
      name: db
      # 指定协议
      protocol: TCP
    #- containerPort: 80
    #  hostIP: 10.0.0.233
    #  hostPort: 18080
    #  name: wp
    env:
    - name: MYSQL_ALLOW_EMPTY_PASSWORD
      value: "yes"
    - name: MYSQL_DATABASE
      value: "wordpress"
    - name: MYSQL_USER
      value: "admin"
    - name: MYSQL_PASSWORD
      value: "baimei"
  - name: wp
    image: harbor.baimei.com/baimei-wordpress/wordpress:latest
    env:
    - name: WORDPRESS_DB_HOST
      value: "127.0.0.1"
    - name: WORDPRESS_DB_USER
      value: "admin"
    - name: WORDPRESS_DB_PASSWORD
      value: "baimei"
    - name: WORDPRESS_DB_NAME
      value: "wordpress"
    ports:
    - containerPort: 80
      hostIP: 10.0.0.233
      hostPort: 18080
      name: wp

欢迎来撩 ： 汇总all