blog/docker-in-production-for-the-average-devops

Dockerfile

# Base container
RUN apt-get install gcc build-essential git python-dev ...

docker build --force-rm=true --rm=true --no-cache -t=yourapp/base .

# yourwebapp:latest
FROM yourwebapp:base
ADD yoursource ....

docker build --force-rm=true --rm=true --no-cache -t=yourapp:latest
 
# yourwebapp:1.0
FROM yourwebapp:base
ADD yoursource ....

docker build --force-rm=true --rm=true --no-cache -t=yourapp:$(VERSION)

fabfile.py

from fabric.api import *
from fabric.api import run, roles, sudo, local

from yourapp import version

env.roledefs = {
	'docker_eu': ['root@127.0.0.1'],
	'docker_us': ['root@127.0.0.2']
}

def eu():
    env.hosts = ['docker_eu']

def us():
    env.hosts = ['docker_us']

def push_container():
    local('docker push username/app:{0}'.format(version))

@roles('docker_eu', 'docker_us')
def deploy_container():
	sudo('docker pull username/app:{0}'.format(version))
    
# To run this on different hosts
# fab eu run_container
# fab us run_container
def run_container():
    sudo('docker run username/app:{0}')

@roles('docker_eu', 'docker_us')
def list_images():
	sudo('docker images')

@roles('docker_eu', 'docker_us')
def running_containers():
	sudo('docker ps -a')

Makefile

BUILD=build/package
SRC=../
YOUR_APP=~/djangoapp
DYNAMIC="sh -c 'get some env variable'"
VERSION=`PYTHONPATH=$(SRC) python -c "from amonagent import __version__; print __version__"`

install_base:
    mkdir -p $(BUILD)
    cp $(YOUR_APP) $(BUILD)
    @echo $(VERSION)

build_container_base:
    cp $(YOUR_APP)/packaging/docker/Dockerfile.base Dockerfile
    docker build --force-rm=true --rm=true --no-cache -t=yourapp/base .  
    rm Dockerfile

build_container:
    cp $(YOUR_APP)/packaging/docker/Dockerfile Dockerfile
    sed -i s/DYNAMIC_VARIABLE/"$(DYNAMIC)"/g Dockerfile
    docker build --force-rm=true --rm=true --no-cache -t=yourapp:$(VERSION) .  
    rm Dockerfile

deploy:
    docker push yourapp:$(VERSION)


# Dockerfile
FROM yourapp/base
ADD DYNAMIC_VARIABLE var/
......

CMD ["/usr/bin/supervisord"]