MK

Leonardo & Docker

Requirements

  • docker

  • docker-compose

Basic setup

Leonardo under Gunicorn worker and Postgresql, Memcached as Cache backend and Nginx as server.

git clone https://github.com/django-leonardo/django-leonardo

cd django-leonardo
cat docker-compose.yml

web:
  restart: always
  build: .
  expose:
    - "8000"
  links:
    - postgres:postgres
    - memcached:memcached
  env_file: ./contrib/django/.env
  ports:
    - "8000:8000"
  volumes:
    - /var/lib/leonardo/static
    - /var/lib/leonardo/media
  command: >
      bash -c "python /usr/lib/leonardo/myproject/manage.py makemigrations &&
      python /usr/lib/leonardo/myproject/manage.py migrate --noinput &&
      python /usr/lib/leonardo/myproject/manage.py sync_all -f &&
      gunicorn leonardo_site.wsgi:application -w 2 -b :8000"

nginx:
  restart: always
  build: ./contrib/nginx
  ports:
    - "80:80"
  volumes:
    - /var/lib/leonardo/static
    - /var/lib/leonardo/media
  volumes_from:
    - web
  links:
    - web:web

postgres:
  restart: always
  image: postgres:latest
  env_file: ./contrib/django/.env
  volumes_from:
    - data
  ports:
    - "5432:5432"

memcached:
  image: memcached
  ports:
    - "11211:11211"

data:
  env_file: ./contrib/django/.env
  restart: always
  image: postgres:latest
  volumes:
    - /var/lib/postgresql
  command: "true"

docker-compose up

docker-compose logs

Firstly when you start web conainer we create database schema and compress static files, then you can run the scale command

Leonardo CMS Quickstart

note: run docker-compose build --no-cache for building fresh image

Scaling

Now we replace Nginx with HAProxy and scale web server.

cd contrib/haproxy
cat docker-compose.yml

web:
  restart: always
  build: ../../
  expose:
    - "8000"

..

lb:
  image: tutum/haproxy
  links:
   - web
  ports:
   - "80:80"
  environment:
   - BACKEND_PORT=8000
   - BALANCE=roundrobin

..

docker-compose up -d

Creating haproxy_memcached_1
Creating haproxy_data_1
Creating haproxy_postgres_1
Creating haproxy_web_1
Creating haproxy_lb_1

docker-compose scale web=3

Creating and starting 2 ... done
Creating and starting 3 ... done

docker-compose up --force-recreate -d

Recreating haproxy_memcached_1
Recreating haproxy_data_1
Recreating haproxy_postgres_1
Recreating haproxy_web_2
Recreating haproxy_web_1
Recreating haproxy_lb_1

docker-compose ps
       Name                      Command                 State                      Ports                 
---------------------------------------------------------------------------------------------------------
haproxy_data_1        /docker-entrypoint.sh true       Restarting   5432/tcp                              
haproxy_lb_1          python /haproxy/main.py          Up           1936/tcp, 443/tcp, 0.0.0.0:80->80/tcp 
haproxy_memcached_1   /entrypoint.sh memcached         Up           0.0.0.0:11211->11211/tcp              
haproxy_postgres_1    /docker-entrypoint.sh postgres   Up           0.0.0.0:5432->5432/tcp                
haproxy_web_1         bash -c python /usr/lib/le ...   Up           8000/tcp                              
haproxy_web_2         bash -c python /usr/lib/le ...   Up           8000/tcp                              
haproxy_web_3         bash -c python /usr/lib/le ...   Up           8000/tcp   

docker logs

note: you must wait for migrations before run scale command

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