example docker-compose with netwroks

database.yml

# PostgreSQL. Versions 9.1 and up are supported.
#
# Install the pg driver:
#   gem install pg
# On OS X with Homebrew:
#   gem install pg -- --with-pg-config=/usr/local/bin/pg_config
# On OS X with MacPorts:
#   gem install pg -- --with-pg-config=/opt/local/lib/postgresql84/bin/pg_config
# On Windows:
#   gem install pg
#       Choose the win32 build.
#       Install PostgreSQL and put its /bin directory on your path.
#
# Configure Using Gemfile
# gem 'pg'
#
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000
  host: 172.19.0.2
  port: <%=  ENV['POSTGRES_PORT'] %>
  username: wizebee
  password: <%= ENV['POSTGRES_PASSWORD'] %>

development:
  <<: *default
  database: filter_development

  # The specified database role being used to connect to postgres.
  # To create additional roles in postgres see `$ createuser --help`.
  # When left blank, postgres will use the default role. This is
  # the same name as the operating system user that initialized the database.
  #username: filter

  # The password associated with the postgres role (username).
  #password:

  # Connect on a TCP socket. Omitted by default since the client uses a
  # domain socket that doesn't need configuration. Windows does not have
  # domain sockets, so uncomment these lines.
  #host: localhost

  # The TCP port the server listens on. Defaults to 5432.
  # If your server runs on a different port number, change accordingly.
  #port: 5432

  # Schema search path. The server defaults to $user,public
  #schema_search_path: myapp,sharedapp,public

  # Minimum log levels, in increasing order:
  #   debug5, debug4, debug3, debug2, debug1,
  #   log, notice, warning, error, fatal, and panic
  # Defaults to warning.
  #min_messages: notice

# 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:
  <<: *default
  database: filter_test

# As with config/secrets.yml, you never want to store sensitive information,
# like your database password, in your source code. If your source code is
# ever seen by anyone, they now have access to your database.
#
# Instead, provide the password as a unix environment variable when you boot
# the app. Read http://guides.rubyonrails.org/configuring.html#configuring-a-database
# for a full rundown on how to provide these environment variables in a
# production deployment.
#
# On Heroku and other platform providers, you may have a full connection URL
# available as an environment variable. For example:
#
#   DATABASE_URL="postgres://myuser:mypass@localhost/somedatabase"
#
# You can use this database configuration with:
#
#   production:
#     url: <%= ENV['DATABASE_URL'] %>
#
production:
  <<: *default
  database: filter_production
  username: filter
  password: <%= ENV['FILTER_DATABASE_PASSWORD'] %>

docker-compose.yml

#https://812bits.wordpress.com/2016/03/23/postgresql-jsonb-type-hands-on/
#https://blog.andyet.com/2016/02/04/postgres-9.5-document-store-hybrid/
#http://www.dalibo.org/_media/understanding_explain.pdf
#https://github.com/fordodone/static_ip_docker/blob/master/docker-compose.yml
#https://fordodone.com/2016/03/30/docker-compose-static-ip-address-in-docker-compose-yml/


#--force-rm  Always remove intermediate containers.
#docker-compose  build --force-rm  and  then docker-compose up
#docker-compose --file docker-compose-dev.yml  build --force-rm --verbose
# docker-compose --file docker-compose-dev.yml up redis
#https://docs.docker.com/compose/compose-file/#versioning
#https://github.com/tutumcloud/redis#setting-a-specific-password
#https://github.com/docker-library/docs/blob/master/redis/content.md#additionally-if-you-want-to-use-your-own-redisconf-
 #COPY redis.conf /usr/local/etc/redis/redis.conf
 #CMD [ "redis-server", "/usr/local/etc/redis/redis.conf" ]
#https://raw.githubusercontent.com/antirez/redis/2.8/redis.conf
  #eg docker-compose version 2
#https://github.com/vsemionov/hippo/blob/master/docker-compose.yml
#https://github.com/Nanocloud/community/blob/master/modules/docker-compose.yml
#sudo cat  /var/lib/docker/volumes/redis-conf/_data/redis.conf

version: '2'

services:
  db:
    image: postgres:latest    #9.5.4
    ports:
      - "5432:5432"
    networks:
      mydev:
        ipv4_address: 172.19.0.2
    restart: always
    environment:
       #for use in rails datab
       #DB_ENV_POSTGRES_PASSWORD="${POSTGRES_PASSWORD}"
       POSTGRES_USER: "${POSTGRES_USER}"
       POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
       #POSTGRES_DB
    #command: postgres -c max_connections=100 -c tcp_keepalives_idle=30 -c tcp_keepalives_interval=10 -c tcp_keepalives_count=3
    volumes:
      - postgres_data:/var/lib/postgresql/data
    container_name: "postgres"

  redis:
    image: redis:latest      #3.2.3
    mem_limit: 268435456
    environment:
      - REDIS_PASS="${REDIS_PASS}"
    ports:
      - "6379:6379"  
    networks:
      mydev:
        ipv4_address: 172.19.0.3
    command: redis-server --requirepass "${REDIS_PASS}"  --appendonly yes 
    #command: redis-server --requirepass "${REDIS_PASS}" --maxclients 10000 --tcp-keepalive 30 --appendonly yes
    restart: always
    volumes:
      - redis_data:/data
      #- redis-conf/_data/redis.conf:/usr/local/etc/redis/redis.conf:ro
      #- redis-conf:/usr/local/etc/redis/redis.conf:ro 
    container_name: "redis"

volumes:
  postgres_data:
    driver: local
  redis_data:
    driver: local
  #redis-conf:
    #driver: local
   
networks:
  mydev:
    driver: bridge
    ipam:
      config:
      - subnet:    172.19.0.0/24
        gateway:   172.19.0.1

redis.yml

#https://github.com/mperham/sidekiq/wiki/Using-Redis

=begin

Sidekiq.configure_server do |config|
  config.redis = { url: "redis://#{Rails.application.secrets.redis_host}:#{Rails.application.secrets.redis_host_port}", password: "#{Rails.application.secrets.redis_password
}", namespace: Rails.applications.secrets.redis_namespace  }
end

Sidekiq.configure_client do |config|
  config.redis = { url: "redis://#{Rails.application.secrets.redis_host}:#{Rails.application.secrets.redis_host_port}", password: "#{Rails.application.secrets.redis_password
}" }
end

=end
if Rails.env == 'development'
  Sidekiq.configure_server do |config|
    #config.redis = { url: "redis://172.19.0.2:6379", password: ""}
    #config.redis = { url: "redis://:password@172.19.0.2:6379"}
    config.redis = {:url => Rails.application.secrets["redis_local_url"]}
  end

  Sidekiq.configure_client do |config|
    config.redis = { url: "redis://:password@172.19.0.2:6379" }
    config.redis = {:url => Rails.application.secrets["redis_local_url"]}

  end

end