Question

我有一个新的Rails应用程序，我打算在Docker容器中部署。我们使用structure.sql代替schema.rb。在我的本地设置中（使用docker-compose文件，Postgres在一个单独的容器中），当我运行rails db:setup时，我收到以下错误：

rails aborted!
failed to execute:
psql -q -f /rails/db/structure.sql cappy_dev

Please check the output above for any errors and make sure that `psql` is installed in your PATH and has proper permissions.

/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/postgresql_database_tasks.rb:99:in `run_cmd'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/postgresql_database_tasks.rb:71:in `structure_load'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:213:in `structure_load'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:226:in `load_schema'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:253:in `block in load_schema_current'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:292:in `block in each_current_configuration'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:291:in `each'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:291:in `each_current_configuration'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/tasks/database_tasks.rb:252:in `load_schema_current'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/railties/databases.rake:306:in `block (3 levels) in <top (required)>'
/usr/local/bundle/gems/activerecord-5.0.2/lib/active_record/railties/databases.rake:310:in `block (3 levels) in <top (required)>'
/usr/local/bundle/gems/railties-5.0.2/lib/rails/commands/rake_proxy.rb:14:in `block in run_rake_task'
/usr/local/bundle/gems/railties-5.0.2/lib/rails/commands/rake_proxy.rb:11:in `run_rake_task'
/usr/local/bundle/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:51:in `run_command!'
/usr/local/bundle/gems/railties-5.0.2/lib/rails/commands.rb:18:in `<top (required)>'
bin/rails:9:in `require'
bin/rails:9:in `<main>'
Tasks: TOP => db:structure:load
(See full trace by running task with --trace)

这是有道理的，因为我的Rails容器只有与Ruby和Rails相关的工具，并且没有Postgres容器中的Postgres或pqsl。

如果我的Rails容器中没有psql，pg_dump和其他Postgres工具，如何运行rails db:setup（或db:migrate或其他任务）？

更新：这是我的docker-compose文件：

version: '3'
services:
  postgres:
    image: postgres:9.6
    volumes:
      - cappy-data:/var/lib/postgresql/data
    ports:
      - '5432:5432'
    environment:
      POSTGRES_PASSWORD: postgres

  cappy:
    image: REDACTED.dkr.ecr.us-east-1.amazonaws.com/cappy:latest
    build:
      context: .
    command: rails s -p 3000 -b '0.0.0.0'
    depends_on:
      - postgres
    volumes:
      - .:/rails
    ports:
      - "3000:3000"
    links:
      - "postgres:postgres"
    environment:
      RAILS_ENV: development

volumes:
  cappy-data:

我不认为这个文件是问题 - db:setup可以创建数据库，它只是无法加载structure.sql因为它似乎无法找到psql }。

Answer 1

我尝试了几件事 - 运行rails db:create然后db:migrate会设置本地数据库，但从长远来看它不会起作用，因为当你运行时{ {1}}，在任务结束时转储模式。使用Postgres，并且rails db:migrate设置为schema_format（这是生成:sql文件的内容），rake任务依赖于Postgres工具，如psql和pg_dump。

最后，处理它的最佳方法是将postgresql-client（不需要整个服务器）添加到Rails Docker镜像。它拥有手头所需的工具，一切正常。

在Docker中使用structure.sql中的模式运行`rails db：setup`

1 个答案: