/home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/connection/ruby.rb:152:in'getaddrinfo '：getaddrinfo：名前またはサービスが不明（SocketError）

Question

私はtech-stack ROR、postgres、redis、mongoを開発者に提供するためにdocker-composeを使用しています。 docker-compose buildは正常に動作していますが、エラーが発生した後にdocker-compose upを実行しました。 Dockerfile

ある

# Base image. 
FROM atlashealth/ruby:2.2.1 

# System dependencies for gems. 
#RUN apt-get update 
#RUN apt-get install -y --no-install-recommends libmysqlclient-dev 
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev 

# Add 'web' user which will run the application. 
RUN adduser web --home /home/web --shell /bin/bash --disabled-password --gecos "" 

# Add directory where all application code will live and own it by the web user. 
RUN mkdir /app 
RUN chown -R web:web /app 

# Install gems separately here to take advantage of container caching of `bundle install`. 
# Also, ensure that gems are installed as the web user and not system-wide so that we can run 
# `fig web bundle install` and the web user will have permissions to update the shared Gemfile.lock. 
ADD Gemfile /app/ 
ADD Gemfile.lock /app/ 
RUN chown -R web:web /app 
USER web 
ENV HOME /home/web 
ENV PATH $PATH:/home/web/.gem/ruby/2.2.0/bin 
ENV GEM_HOME /home/web/.gem/ruby/2.2.0 
ENV GEM_PATH $GEM_HOME 
RUN gem install --user-install bundler 
WORKDIR /app/ 
RUN bundle install 
USER root 

# Add the whole application source to the image and own it all by web:web. 
# Note: this is overwritten in development because fig mounts a shared volume at /app. 
ADD . /app/ 
RUN chown -R web:web /app 

# Clean up APT and /tmp when done. 
RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* 

# Default command to run when this container is run. 
USER web 
WORKDIR /app/ 
CMD ["bundle", "exec", "rails", "server"] 

ドッキングウィンドウ-compose.yml

db: 
    image: postgres 
    ports: 
    - "5432" 

redis: 
    image: redis 
    ports: 
    - "6379" 

sidekiq: 
    build: . 
    command: bundle exec sidekiq 
    links: 
    - db 
    - redis 

web: 
    build: . 
    command: bundle exec rails s -b 0.0.0.0 
    volumes: 
    - .:/app 
    ports: 
    - "3000:3000" 
    links: 
    - db 
    - redis 

後

web_1 | => Booting Thin 
web_1 | => Rails 4.2.3 application starting in development on http://0.0.0.0:3000 
web_1 | => Run `rails server -h` for more startup options 
web_1 | => Ctrl-C to shutdown server 
web_1 | Exiting 
web_1 | /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/connection/ruby.rb:152:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError) 
web_1 | from /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/connection/ruby.rb:152:in `connect' 
web_1 | from /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/connection/ruby.rb:211:in `connect' 
web_1 | from /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/client.rb:322:in `establish_connection' 
web_1 | from /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/client.rb:94:in `block in connect' 
web_1 | from /home/web/.gem/ruby/2.2.0/gems/redis-3.2.1/lib/redis/client.rb:279:in `with_reconnect' 

私はpostgresのとRedisのホストの設定環境変数を持っており、ポートacc docker-compose run web envコマンドの出力に向かう。

コマンドの出力docker-compose run web cat /etc/hosts

Starting xyz_db_1... 
Starting xyz_redis_1... 
172.17.0.32 2b231a706e7b 
127.0.0.1 localhost 
::1 localhost ip6-localhost ip6-loopback 
fe00::0 ip6-localnet 
ff00::0 ip6-mcastprefix 
ff02::1 ip6-allnodes 
ff02::2 ip6-allrouters 
172.17.0.31 redis 799b65ac89cd xyz_redis_1 
172.17.0.31 redis_1 799b65ac89cd xyz_redis_1 
172.17.0.30 db 0bd898e19822 xyz_db_1 
172.17.0.30 db_1 0bd898e19822 xyz_db_1 
172.17.0.30 xyz_db_1 0bd898e19822 
172.17.0.31 xyz_redis_1 799b65ac89cd 

設定/ sidekiq.yml

concurrency: 25 
pidfile: ./tmp/pids/sidekiq.pid 
logfile: ./log/sidekiq.log 
queues: 
    - default 
    - [priority, 2] 
daemon: true 

設定/ APP-config.yml

default: &default 
    redis_host: <%= ENV['XYZ_REDIS_1_PORT_6379_TCP_ADDR'] %> 
    redis_port: <%= ENV ['XYZ_REDIS_1_PORT_6379_TCP_PORT'] %> 
    redis_namespace: 'RAILS_CACHE' 

development: 
    <<: *default 
    redis_host: <%= ENV['XYZ_REDIS_1_PORT_6379_TCP_ADDR'] %> 
    redis_port: <%= ENV['XYZ_REDIS_1_PORT_6379_TCP_PORT'] %> 

設定/初期化子/ redis.rb

# global variable to access Redis cache 
# Requirement: Redis server should be up and running 
# at below specified host and port 
$redis = Redis.new(
    :host => APP_CONFIG["redis_host"], 
    :port => APP_CONFIG["redis_port"] 
) 

Answer 1

REDIS_URL環境変数がSidekiqとRedisの宝石の両方にRedisのURLを渡すために使用することができます。

この環境変数は次のようにdocker-compose.ymlで設定することができます。SidekiqとRedisの宝石は、デフォルトでREDIS_URLを使用すると

db: 
    image: postgres 
    ports: 
    - "5432" 

redis: 
    image: redis 
    ports: 
    - "6379" 

web: 
    build: . 
    command: bundle exec rails s -b 0.0.0.0 
    volumes: 
    - .:/app 
    ports: 
    - "3000:3000" 
    links: 
    - db 
    - redis 
    environment: 
    REDIS_URL: "redis://redis:6379" 

、また、あなたはこのデフォルトの動作をオーバーライドしていないことを確認する必要があります設定ファイル。あなたはもうファイルconfig/initializers/redis.rbを必要としない、とあなたのconfig/app-config.ymlは、あなたの名前空間を含める必要があります。それは、アプリケーションの詳細を知らなくても、ここで何が起こっているかを言うのは難しいです

default: &default 
    redis_namespace: 'RAILS_CACHE' 

development: 
    <<: *default