我正试着用docker运行一个RubyonRails项目,我不知道如何让这些东西工作,可能是因为我不熟悉docker。
我在Ubuntu 16.04上,从现在起:
我已安装docker
我已安装docker-compose
我已经成功运行了docker-compose build
但是docker-compose run --rm web bin/setup停止,因为它不能
连接到mysql服务器
我得到的错误是:

#<Mysql2::Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)>
Couldn't create database for {"adapter"=>"mysql2", "host"=>"localhost", "username"=>"root", "password"=>"root", "pool"=>5, "timeout"=>5000,  "database"=>"project"}, {}
Created database 'project'
rails aborted!
Mysql2::Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

看看stackoverflow,很多人说我必须确保mysql服务器正在运行。我该怎么做?docker ps的结果如下(省略命令ans CREATED columns)
CONTAINER ID        IMAGE        STATUS              PORTS                              NAMES
9f03056e2b54        project_web  Up About an hour    0.0.0.0:3035->3035/tcp             project_webpack
465cfbac7cbd        mysql        Up About an hour    3306/tcp                           project_mysql

我的database.yml
# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: mysql2
  host: localhost
  username: root
  password: root
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: project_local

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test: &test
  <<: *default
  database: project_test

production:
  <<: *default
  database: db/production.sqlite3

staging:
  adapter: mysql2
  host: <MY HOST>
  database: project_dev
  username: root
  password: password
  pool: 5
  timeout: 5000
cucumber:
  <<: *test

以及我的docker-compose.yml
version: '3.5'
services:
  web:
    build: .
    image: project_web
    container_name: project_web
    # restart: always
    command: >
      ./wait-for-it.sh db:3306 -- bash -c "
        rails server -p 3000 -b 0.0.0.0 --pid /app/tmp/pids/server.pid
        "
    ports: ["3000:3000"]
    volumes:
      - .:/app
      - ~/tmp:/host_tmp
      - bundle_cache:/bundle
    depends_on:
      - db
    environment:
      - DB_HOST=db
      - DB_USERNAME=root
      - DB_PASSWORD=root
  db:
    container_name: project_mysql
    image: mysql
    environment:
      - MYSQL_ROOT_PASSWORD=root
    volumes:
      - ./db-data:/var/lib/mysql
    restart: always
volumes:
  bundle_cache:
  # Mount volume with default driver

最佳答案

在运行docker compose之前,请尝试运行容器本身:

docker run --rm -it mysql-server:latest bash

这将在容器中为您提供一个正常的shell环境。从那里你可以尝试mysql,配置你的服务器,启动或停止它,以及在一个“正常”的linux上可以做的所有事情。
注:如果你需要mor工具,尝试获取更新,然后安装你需要的。

10-07 19:46
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