endpoint

将外部服务映射为集群内布，便于配置应用路由等

1. 创建endpoint对象

2. addresses: 数组类型，可以为多个，也可以为一个

3. namespace: 命名空间

cat <<EOF | kubectl apply -f -
kind: Endpoints
apiVersion: v1
metadata: 
  name: mysql-external
  namespace: default
subsets:
- addresses:
  - ip: xxx.xxx.xx.xxx
  ports:
   - port: 3306
     name: mysql-external
EOF

1. 创建service对象

2. port: 与endpoint一致

3. metadata.name: 与endpoint一致
4. metadata.namespace: 与endpoint一致

cat <<EOF | kubectl apply -f -
kind: Service
apiVersion: v1
metadata:
  name: mysql-external
  namespace: default
spec:
  ports:
  - port: 3306
    name: mysql-external
    targetPort: 3306
EOF