管理员和迁移无法连接到 Postgresql Docker 容器

Adminer & Migrate Can't Connect to Postgresql Docker Container

我有三个 docker 容器(postgresql、adminer 和 go/migrate)并且我已经向主机公开了 adminer 和 postgres 端口。我可以在我的浏览器中访问adminer,postico也可以连接到DB。当我尝试从管理员内部连接到数据库时,它会抛出此错误:

SQLSTATE[08006] [7] could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP
connections on port 5432? could not connect to server: Address not available
Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432?

迁移容器也抛出这个错误:

error: dial tcp: 127.0.0.1:5432: connect: connection refused

因此,显然容器之间的通信方式存在问题。我需要创建一个 docker 网络吗?

version: '3.1'

services:
  db:
    image: postgres
    environment:
        POSTGRES_DB: mydbname
        POSTGRES_USER: mydbuser
        POSTGRES_PASSWORD: mydbpwd
    ports:
      - "5432:5432"

  migrate:
    image: migrate/migrate
    volumes:
        - .:/migrations
    command: ["-database", "postgres://mydbuser:mydbpwd@localhost:5432/mydbname?sslmode=disable", "-path", "/migrations", "up"]
    links: 
        - db

  adminer:
    image: adminer
    restart: always
    ports:
      - "8081:8080"
    depends_on:
      - db

您不需要创建链接,docker-compose 创建默认网络。服务到服务的通信也应使用服务名称,localhost 表示此容器(迁移)而不是 DB 容器。

localhost更改为db

  migrate:
    image: migrate/migrate
    volumes:
        - .:/migrations
    command: ["-database", "postgres://mydbuser:mybpwd@db:5432/mydbname?sslmode=disable", "-path", "/migrations", "up"]

因为您 DB 服务名称是 db 所以您使用它的名称连接 db 容器。