Docker 无法与 postgres 连接

【问题标题】：Docker Unable to connect with postgresDocker 无法与 postgres 连接
【发布时间】：2019-05-21 10:01:56
【问题描述】：

我有一个 Rails 应用程序，它使用 docker 来运行应用程序，甚至用于开发。

这是 docker-compose 文件

web:
  build: .
  dockerfile: Dockerfile.development
  environment:
    - ALGOLIA_API_KEY
    - ALGOLIA_APP_ID
    - ALGOLIA_INDEX
    - ALGOLIA_SEARCH_KEY
    - AWS_ACCESS_KEY
    - AWS_S3_BUCKET_NAME
    - AWS_SECRET_ACCESS_KEY
    - COVERAGE
    - DEV_EMAIL
    - INTERCOM_API_KEY
    - INTERCOM_API_SECRET
    - INTERCOM_APP_ID
    - LABS_MAILGUN_PASSWORD
    - LABS_MAILGUN_USERNAME
    - MAILGUN_API_KEY
    - MAILGUN_DOMAIN
    - LOB_API_KEY
    - LOG_LEVEL
    - MAX_THREADS
    - NEW_RELIC_KEY
    - OUTBOUND_KEY
    - PAID_API_BASE
    - PAID_DEFAULT_PLAN_ID
    - PAID_PUBLIC_API_BASE
    - PAID_PUBLISHABLE_KEY
    - PAID_SECRET_KEY
    - PLAID_CLIENT_ID
    - PLAID_PUBLIC_KEY
    - PLAID_SECRET_KEY
    - PLATFORM_API_TOKEN
    - RACK_ENV=development
    - RACK_TIMEOUT
    - RAILS_ENV=development
    - REDISCLOUD_URL
    - REDIS_PROVIDER
    - RESQUE_LOG_LEVEL
    - SECRET_KEY_BASE
    - SECRET_KEY_BASE_PRODUCTION
    - SECRET_KEY_BASE_STAGING
    - STRIPE_ACCOUNT_ID
    - STRIPE_CLIENT_ID
    - STRIPE_PUBLISHABLE_KEY
    - STRIPE_SECRET_KEY
    - STRIPE_TEST_CLIENT_ID
    - STRIPE_TEST_PUBLISHABLE_KEY
    - STRIPE_TEST_SECRET_KEY
    - TEST_ENV_NUMBER
    - UNICORN_TIMEOUT
    - VERBOSE
    - WEB_CONCURRENCY
  labels:
    - convox.port.543.protocol=tls
    - convox.port.543.proxy=true
    - convox.port.90.proxy=true
  links:
    - database
    - redis
  ports:
    - 90:4000
    - 543:4001

database:
  image: convox/postgres
  ports:
    - 5432
  volumes:
    - /Users/vishal.awathare/Library/Application\ Support/Postgres/var-11

database-test:
  image: convox/postgres
  ports:
    - 5432
  volumes:
    - /Users/vishal.awathare/Library/Application\ Support/Postgres/var-11

redis:
  environment:
    - RACK_ENV=development
    - RACK_TIMEOUT
    - RAILS_ENV=development
  image: convox/redis
  ports:
    - 6379

resque:
  build: .
  dockerfile: Dockerfile.development
  command: bundle exec rake resque:work
  environment:
    - ALGOLIA_API_KEY
    - ALGOLIA_APP_ID
    - ALGOLIA_INDEX
    - ALGOLIA_SEARCH_KEY
    - AWS_ACCESS_KEY
    - AWS_S3_BUCKET_NAME
    - AWS_SECRET_ACCESS_KEY
    - COVERAGE
    - DEV_EMAIL
    - INTERCOM_API_KEY
    - INTERCOM_API_SECRET
    - INTERCOM_APP_ID
    - LABS_MAILGUN_PASSWORD
    - LABS_MAILGUN_USERNAME
    - MAILGUN_API_KEY
    - MAILGUN_DOMAIN
    - LOB_API_KEY
    - LOG_LEVEL
    - MAX_THREADS
    - NEW_RELIC_KEY
    - OUTBOUND_KEY
    - PAID_API_BASE
    - PAID_DEFAULT_PLAN_ID
    - PAID_PUBLIC_API_BASE
    - PAID_PUBLISHABLE_KEY
    - PAID_SECRET_KEY
    - PLAID_CLIENT_ID
    - PLAID_PUBLIC_KEY
    - PLAID_SECRET_KEY
    - PLATFORM_API_TOKEN
    - QUEUE=*
    - RACK_ENV=development
    - RACK_TIMEOUT
    - RAILS_ENV=development
    - REDISCLOUD_URL
    - REDIS_PROVIDER
    - RESQUE_LOG_LEVEL
    - RESQUE_TERM_TIMEOUT=10
    - SECRET_KEY_BASE
    - SECRET_KEY_BASE_PRODUCTION
    - SECRET_KEY_BASE_STAGING
    - STRIPE_ACCOUNT_ID
    - STRIPE_CLIENT_ID
    - STRIPE_PUBLISHABLE_KEY
    - STRIPE_SECRET_KEY
    - STRIPE_TEST_CLIENT_ID
    - STRIPE_TEST_PUBLISHABLE_KEY
    - STRIPE_TEST_SECRET_KEY
    - TERM_CHILD=1
    - TEST_ENV_NUMBER
    - UNICORN_TIMEOUT
    - VERBOSE
    - WEB_CONCURRENCY
  links:
    - database
    - redis

clock:
  build: .
  dockerfile: Dockerfile.development
  command: bundle exec rake resque:scheduler
  environment:
    - ALGOLIA_API_KEY
    - ALGOLIA_APP_ID
    - ALGOLIA_INDEX
    - ALGOLIA_SEARCH_KEY
    - AWS_ACCESS_KEY
    - AWS_S3_BUCKET_NAME
    - AWS_SECRET_ACCESS_KEY
    - COVERAGE
    - DEV_EMAIL
    - INTERCOM_API_KEY
    - INTERCOM_API_SECRET
    - INTERCOM_APP_ID
    - LABS_MAILGUN_PASSWORD
    - LABS_MAILGUN_USERNAME
    - MAILGUN_API_KEY
    - MAILGUN_DOMAIN
    - LOB_API_KEY
    - LOG_LEVEL
    - MAX_THREADS
    - NEW_RELIC_KEY
    - OUTBOUND_KEY
    - PAID_API_BASE
    - PAID_DEFAULT_PLAN_ID
    - PAID_PUBLIC_API_BASE
    - PAID_PUBLISHABLE_KEY
    - PAID_SECRET_KEY
    - PLAID_CLIENT_ID
    - PLAID_PUBLIC_KEY
    - PLAID_SECRET_KEY
    - PLATFORM_API_TOKEN
    - RACK_ENV=development
    - RACK_TIMEOUT
    - RAILS_ENV=development
    - REDISCLOUD_URL
    - REDIS_PROVIDER
    - RESQUE_LOG_LEVEL
    - SECRET_KEY_BASE
    - SECRET_KEY_BASE_PRODUCTION
    - SECRET_KEY_BASE_STAGING
    - STRIPE_ACCOUNT_ID
    - STRIPE_CLIENT_ID
    - STRIPE_PUBLISHABLE_KEY
    - STRIPE_SECRET_KEY
    - STRIPE_TEST_CLIENT_ID
    - STRIPE_TEST_PUBLISHABLE_KEY
    - STRIPE_TEST_SECRET_KEY
    - TEST_ENV_NUMBER
    - UNICORN_TIMEOUT
    - VERBOSE
    - WEB_CONCURRENCY
  links:
    - database
    - redis

test:
  build: .
  dockerfile: Dockerfile.development
  environment:
    - ALGOLIA_API_KEY
    - ALGOLIA_APP_ID
    - ALGOLIA_INDEX
    - ALGOLIA_SEARCH_KEY
    - AWS_ACCESS_KEY
    - AWS_S3_BUCKET_NAME
    - AWS_SECRET_ACCESS_KEY
    - COVERAGE
    - DEV_EMAIL
    - INTERCOM_API_KEY
    - INTERCOM_API_SECRET
    - INTERCOM_APP_ID
    - LABS_MAILGUN_PASSWORD
    - LABS_MAILGUN_USERNAME
    - MAILGUN_API_KEY
    - MAILGUN_DOMAIN
    - LOB_API_KEY
    - LOG_LEVEL
    - MAX_THREADS
    - NEW_RELIC_KEY
    - OUTBOUND_KEY
    - PAID_API_BASE
    - PAID_DEFAULT_PLAN_ID
    - PAID_PUBLIC_API_BASE
    - PAID_PUBLISHABLE_KEY
    - PAID_SECRET_KEY
    - PLAID_CLIENT_ID
    - PLAID_PUBLIC_KEY
    - PLAID_SECRET_KEY
    - PLATFORM_API_TOKEN
    - RACK_ENV=test
    - RACK_TIMEOUT
    - RAILS_ENV=test
    - REDISCLOUD_URL
    - REDIS_PROVIDER
    - RESQUE_LOG_LEVEL
    - SECRET_KEY_BASE
    - SECRET_KEY_BASE_PRODUCTION
    - SECRET_KEY_BASE_STAGING
    - STRIPE_ACCOUNT_ID
    - STRIPE_CLIENT_ID
    - STRIPE_PUBLISHABLE_KEY
    - STRIPE_SECRET_KEY
    - STRIPE_TEST_CLIENT_ID
    - STRIPE_TEST_PUBLISHABLE_KEY
    - STRIPE_TEST_SECRET_KEY
    - TEST_ENV_NUMBER
    - UNICORN_TIMEOUT
    - VERBOSE
    - WEB_CONCURRENCY
  links:
    - database-test
    - redis

admin:
  build: .
  dockerfile: Dockerfile.development
  environment:
    - ALGOLIA_API_KEY
    - ALGOLIA_APP_ID
    - ALGOLIA_INDEX
    - ALGOLIA_SEARCH_KEY
    - AWS_ACCESS_KEY
    - AWS_S3_BUCKET_NAME
    - AWS_SECRET_ACCESS_KEY
    - COVERAGE
    - DEV_EMAIL
    - INTERCOM_API_KEY
    - INTERCOM_API_SECRET
    - INTERCOM_APP_ID
    - LABS_MAILGUN_PASSWORD
    - LABS_MAILGUN_USERNAME
    - MAILGUN_API_KEY
    - MAILGUN_DOMAIN
    - LOB_API_KEY
    - LOG_LEVEL
    - MAX_THREADS
    - NEW_RELIC_KEY
    - OUTBOUND_KEY
    - PAID_API_BASE
    - PAID_DEFAULT_PLAN_ID
    - PAID_PUBLIC_API_BASE
    - PAID_PUBLISHABLE_KEY
    - PAID_SECRET_KEY
    - PLAID_CLIENT_ID
    - PLAID_PUBLIC_KEY
    - PLAID_SECRET_KEY
    - PLATFORM_API_TOKEN
    - RACK_ENV=development
    - RACK_TIMEOUT
    - RAILS_ENV=development
    - REDISCLOUD_URL
    - REDIS_PROVIDER
    - RESQUE_LOG_LEVEL
    - SECRET_KEY_BASE
    - SECRET_KEY_BASE_PRODUCTION
    - SECRET_KEY_BASE_STAGING
    - STRIPE_ACCOUNT_ID
    - STRIPE_CLIENT_ID
    - STRIPE_PUBLISHABLE_KEY
    - STRIPE_SECRET_KEY
    - STRIPE_TEST_CLIENT_ID
    - STRIPE_TEST_PUBLISHABLE_KEY
    - STRIPE_TEST_SECRET_KEY
    - TEST_ENV_NUMBER
    - UNICORN_TIMEOUT
    - VERBOSE
    - WEB_CONCURRENCY
  links:
    - database
    - redis

这是我的 dockerfile.development 文件

FROM location/app-base-image

# Docker won't let us use $HOME in `ENV PATH=...` without setting HOME first
ENV HOME /root
ENV PATH $HOME/.rbenv/shims:$PATH

RUN rm -rf `rbenv root`
RUN git clone https://github.com/rbenv/rbenv.git /root/.rbenv
RUN mkdir -p "$(rbenv root)"/plugins
RUN git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build

RUN rbenv install 2.3.7
RUN rbenv global 2.3.7
RUN rbenv local 2.3.7

RUN gem install bundler -v 1.13.1 && rbenv rehash

COPY .convox/bin/web bin/web
COPY .convox/conf/nginx.conf /etc/nginx/nginx.conf

COPY Gemfile ./Gemfile
COPY Gemfile.lock ./Gemfile.lock
RUN bundle install && rbenv rehash

ENV DATABASE_URL postgres://host
ENV ALGOLIA_APP_ID FOO
ENV REDIS_URL redis://host

COPY . .

CMD ["bin/web"]

首先我跑

 docker-compose -f docker-compose.development.yml build

它运行成功。然后我运行

docker-compose -f docker-compose.development.yml up

这给了我错误

admin_1          | E, [2019-05-21T09:58:40.069558 #8] ERROR -- : could not translate host name "host" to address: Name or service not known
admin_1          |  (PG::ConnectionBad)

我注意到环境变量可能设置错误。所以在 dockerfile 我将ENV DATABASE_URL postgres://host 更改为ENV DATABASE_URL postgres://localhost:5432。然后错误消息变为 

Is the server running on host "localhost" (127.0.0.1) and accepting     TCP/IP connections on port 5432?

我错过了一些基本的东西吗？

【问题讨论】：

  • 必须提供管理服务中的DATABASE_URL。
  • @NeverBe 尝试但不能修复它
  • 我的意思是 ENV var 启动“admin”服务，如果它不存在，它会在 database.yml 中寻找它

标签： ruby-on-rails postgresql docker


【解决方案1】：

您的数据库服务器未在运行您的应用程序的容器中运行。您的容器似乎在名为 database 的容器中运行，所以这是您的主机名。

我还建议为您的应用创建一个单独的网络并将容器附加到该网络而不是默认网络。

【讨论】：

  • 我很困惑。我应该将database 主机名放在哪里才能使其正常工作？
  • 您在帖子末尾提到您将 ENV DATABASE_URL postgres://host 更改为 ENV DATABASE_URL postgres://localhost:5432。试试ENV DATABASE_URL postgres://database
  • 很遗憾，这不起作用`无法将主机名“数据库”转换为地址：名称或服务未知`
  • 你能在那个容器中执行一个shell并执行ping database吗？
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