Question

我正在尝试安装dockero版本的mastodon，尽管我已经参考了几本指南（包括官方文档），但在连接到postgres数据库时始终遇到错误。

这是我的docker-compose.yml的相关部分：

  db:                                                                                                                                                
     restart: always                                                                                                                                  
     image: postgres:9.6-alpine                                                                                                                       
     shm_size: 256mb                                                                                                                                  
     networks:                                                                                                                                        
       - internal_network                                                                                                                             
     healthcheck:                                                                                                                                     
       test: ["CMD", "pg_isready", "-U", "postgres"]                                                                                                  
     volumes:                                                                                                                                         
       - ./postgres:/var/lib/postgresql/data

...和我的.env.production：

# PostgreSQL                                                                                                                                         
 # ----------                                                                                                                                         
 DB_HOST=/var/run/postgresql                                                                                                                          
 DB_USER=mastodon                                                                                                                                     
 DB_NAME=mastodon_production                                                                                                                          
 DB_PASS=[MY PASSWORD]   <--- (I've also tried leaving this blank with no difference in the result)                                                                                                                           
 DB_PORT=5432

但是当我跑步时（例如）： $ docker-compose run --rm web rails db:migrate

我得到以下输出：

    rails aborted!
    PG::ConnectionBad: could not connect to server: No such file or directory
        Is the server running locally and accepting
        connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

和$ docker logs mastodon_db_1给我：

Error: Database is uninitialized and superuser password is not specified.
       You must specify POSTGRES_PASSWORD to a non-empty value for the
       superuser. For example, "-e POSTGRES_PASSWORD=password" on "docker run".

       You may also use "POSTGRES_HOST_AUTH_METHOD=trust" to allow all
       connections without a password. This is *not* recommended.

       See PostgreSQL documentation about "trust":
       https://www.postgresql.org/docs/current/auth-trust.html

我对Docker相对较新，但是（我认为）我了解基本概念。但是，Googling的很多让我认为我是唯一遇到此问题的人，我看不到我不见了。

Answer 1

第二个错误是由于缺少Postgres容器所需的ENV。

Error: Database is uninitialized and superuser password is not specified.
       You must specify POSTGRES_PASSWORD to a non-empty value for the
       superuser

POSTGRES_PASSWORD

此环境变量是使用PostgreSQL映像所必需的。不能为空或未定义。此环境变量设置PostgreSQL的超级用户密码。默认的超级用户是由POSTGRES_USER环境变量定义的

您需要指定POSTGRES_PASSWORD ENV

  db:
    image: postgres
    restart: always
    environment:
      POSTGRES_PASSWORD: example
      POSTGRES_DB: mastodon_production
      POSTGRES_USER: mastodon

postgres-docker-Environment Variables

第二个错误似乎是主机无效或您没有从Environment变量正确使用

。

PG::ConnectionBad: could not connect to server: No such file or directory

将dot env文件更改为

 DB_HOST=db                                                                                                                          
 DB_USER=mastodon                                                                                                                                     
 DB_NAME=mastodon_production                                                                                                                          
 DB_PASS=example  <--- (the one which is set in DB)                                                                                                                           
 DB_PORT=5432

DB_HOST应该是从另一个容器连接到DB的服务名称。

安装docker mastodon时postgres无法启动

1 个答案: