Docker 101

Docker 101

Transcript

  1. 2.

    DOCKER 101 DOCKER? ▸ Container creation/management software. ▸ Performs OS-level

    virtualization. ▸ Simplifies deployment workflows. ▸ Avoid the “it works on my machine” issue. ▸ Local environments are equivalent to their production counterparts. ▸ It forces teams to work with CI/CD technologies.
  2. 5.

    FROM ruby:2.4 RUN apt-get update -qq && apt-get install -y

    build-essential libpq-dev nodejs RUN mkdir /demo WORKDIR /demo COPY Gemfile /demo/Gemfile COPY Gemfile.lock /demo/Gemfile.lock RUN bundle install COPY . /demo Dockerfile
  3. 6.

    DOCKER 101 DOCKERFILE ▸ Set of instructions that will run

    within the container. ▸ Same old commands. ▸ Simple. ▸ VCS friendly!
  4. 8.

    version: '2' services: db: image: postgres:9.4.1 ports: - "5432:5432" redis:

    image: redis ports: - "6379:6379" sidekiq: build: . volumes: - .:/myapp links: - db - redis command: bundle exec sidekiq web: build: . command: bin/rails server --port 3000 --binding 0.0.0.0 ports: - "3000:3000" links: - db - redis volumes: - .:/myapp # This tells the web container to mount the `bundle` images' # # /bundle volume to the `web` containers /bundle path. volumes_from: - bundle bundle: image: busybox volumes: - /bundle docker-compose.yml
  5. 9.

    DOCKER 101 DOCKER COMPOSE ▸ Run all the things! ▸

    Allows us to define and run multi-container apps. ▸ Monitoring & Maintenance ▸ Start/Stop/Rebuild. ▸ Current Status. ▸ Logging. ▸ Run commands.