DIP

Docker Interaction Process

A command-line utility that gives the "native" interaction with applications configured with Docker Compose. It is for local development only. In practice, it creates the feeling that you work without containers.

Presentations and examples

• Local development with Docker containers
• Dockerized Ruby on Rails applications: one, two
• Dockerized Node.js application
• Dockerized Ruby gem

Integration with shell

Dip can be injected into the current shell (ZSH or Bash).

eval "$(dip console)"

After that we can type commands without dip prefix. For example:

<run-command> *any-args
compose *any-compose-arg
up <service>
down
provision

When we change the current directory, all shell aliases will be automatically removed. But when we enter back into a directory with a dip.yml file, then shell aliases will be renewed.

Also, in shell mode Dip is trying to determine manually passed environment variables. For example:

VERSION=20180515103400 rails db:migrate:down

You could add this eval at the end of your ~/.zshrc, or ~/.bashrc, or ~/.bash_profile. After that, it will be automatically applied when you open your preferred terminal.

Installation

You have many ways.

Homebrew

You can use Homebrew on macOS (or Linux).

Today Homebrew tap for DIP is located at https://github.com/bibendi/homebrew-dip

brew tap bibendi/dip
brew install dip

Ruby Gem

gem install dip

Precompiled binary

If you don't have installed Ruby, then you could copy a precompiled binary to your system. It can be found at releases page or type bellow into your terminal:

curl -L https://github.com/bibendi/dip/releases/download/4.1.0/dip-`uname -s`-`uname -m` > /usr/local/bin/dip
chmod +x /usr/local/bin/dip

Docker installation

• Ubuntu
• Mac OS

Usage

dip --help
dip SUBCOMMAND --help

dip generate

If your project has a typical schema, dip can generate all necessary config files with a single command. Available generators you can find at here

dip generate ruby/gem --ruby 2.6 --bundler 2.0.2 --postgres 11.4

dip generate ruby/rails --ruby 2.6 --bundler 2.0.2 --node 11 --yarn 1.13.0 --postgres 11.4 --redis 4 --webpacker --selenium 

You can omit any of above options. To list all available generator's options:

dip generate [STACK] --help

dip file reference

The configuration file dip.yml should be placed in a project root directory. Also, in some cases, you may want to change the default config path by providing an environment variable DIP_FILE. If nearby places dip.override.yml file it would be merged into the main config.

Below is an example of a real config. dip.yml reference will be written soon. Also, you can check out examples in the top.

# Required minimum dip version
version: '4.1'

environment:
  COMPOSE_EXT: development

compose:
  files:
    - docker/docker-compose.yml
    - docker/docker-compose.$COMPOSE_EXT.yml
    - docker/docker-compose.$DIP_OS.yml
  project_name: bear

interaction:
  bash:
    description: Open the Bash shell in app's container
    service: app
    compose:
      run_options: [no-deps]

  bundle:
    description: Run Bundler commands
    service: app
    command: bundle

  rake:
    description: Run Rake commands
    service: app
    command: bundle exec rake

  rspec:
    description: Run Rspec commands
    service: app
    environment:
      RAILS_ENV: test
    command: bundle exec rspec

  rails:
    description: Run Rails commands
    service: app
    command: bundle exec rails
    subcommands:
      s:
        description: Run Rails server at http://localhost:3000
        service: web
        compose:
          run_options: [service-ports]

  sidekiq:
    description: Run sidekiq in background
    service: worker
    compose:
      method: up
      run_options: [detach]

  psql:
    description: Run Postgres psql console
    service: app
    default_args: db_dev
    command: psql -h pg -U postgres

provision:
  - dip compose down --volumes
  - dip compose up -d pg redis
  - dip bash -c ./bin/setup

dip run

Run commands defined within the interaction section of dip.yml

dip run rails c
dip run rake db:migrate

run argument can be omitted

dip rake db:migrate
dip VERSION=12352452 rake db:rollback

dip ls

List al available run commands.

dip ls

bash     # Open the Bash shell in app's container
rails    # Run Rails command
rails s  # Run Rails server at http://localhost:3000

dip provision

Run commands each by each from provision section of dip.yml

dip compose

Run docker-compose commands that are configured according to the application's dip.yml :

dip compose COMMAND [OPTIONS]

dip compose up -d redis

dip ssh

Runs ssh-agent container based on https://github.com/whilp/ssh-agent with your ~/.ssh/id_rsa. It creates a named volume ssh_data with ssh socket. An application's docker-compose.yml should contains environment variable SSH_AUTH_SOCK=/ssh/auth/sock and connects to external volume ssh_data.

dip ssh up

docker-compose.yml

services:
  web:
    environment:
      - SSH_AUTH_SOCK=/ssh/auth/sock
    volumes:
      - ssh-data:/ssh:ro

volumes:
  ssh-data:
    external:
      name: ssh_data

dip nginx

Runs Nginx server container based on bibendi/nginx-proxy image. An application's docker-compose.yml should contain environment variable VIRTUAL_HOST and VIRTUAL_PATH and connects to external network frontend.

foo-project/docker-compose.yml

version: '2'

services:
  foo-web:
    image: company/foo_image
    environment:
      - VIRTUAL_HOST=*.bar-app.docker
      - VIRTUAL_PATH=/
    networks:
      - default
      - frontend
    dns: $DIP_DNS

networks:
  frontend:
    external:
      name: frontend

baz-project/docker-compose.yml

version: '2'

services:
  baz-web:
    image: company/baz_image
    environment:
      - VIRTUAL_HOST=*.bar-app.docker
      - VIRTUAL_PATH=/api/v1/baz_service,/api/v2/baz_service
    networks:
      - default
      - frontend
    dns: $DIP_DNS

networks:
  frontend:
    external:
      name: frontend

dip nginx up
cd foo-project && dip compose up
cd baz-project && dip compose up
curl www.bar-app.docker/api/v1/quz
curl www.bar-app.docker/api/v1/baz_service/qzz

dip dns

Runs a DNS server container based on https://github.com/aacebedo/dnsdock. It is used for container to container requests through Nginx. An application's docker-compose.yml should define dns configuration with environment variable $DIP_DNS and connect to external network frontend. $DIP_DNS will be automatically assigned by dip.

dip dns up

cd foo-project
dip compose exec foo-web curl http://www.bar-app.docker/api/v1/baz_service

Changelog

https://github.com/bibendi/dip/releases