test_docker_django's Introduction

Test Docker+Django

A very basic simple Django app with Docker

Build and push the app image

Create the image

$> docker build -t djangoapp .

Push the image

$> docker tag djangoapp adeleh/djangoapp

$> docker login 

$> docker push adeleh/djangoapp

Run the app

$> docker-compose up

N.B. Go inside a container via te cmd line

$> docker exec -it CONTAINER_ID bash

Check out http://localhost:8000/

Scale the app

$> docker swarm init

$> docker stack deploy -c docker-compose.yml djangoapp

$> docker stack ps djangoapp  # all running containers of the app

$> docker stack rm djangoapp  # stop the app

Swarm cluster

3 nodes, 1 swarm manager and 2 workers

$> docker-machine create --driver virtualbox myvm3

$> docker-machine start myvm1

$> docker-machine ssh myvm1 "docker swarm init --advertise-addr myvm1_ip"

$> docker-machine ssh myvm2 "docker join --token TOKEN myvm1_ip:2377"
$> docker-machine ssh myvm3 "docker join --token TOKEN myvm1_ip:2377"

$> docker-machine ssh myvm1 "docker node ls"  # check there are 3 nodes

$> docker-machine scp docker-compose.yml myvm1:~  # copy the file

$> docker-machine ssh myvm1 "docker stack deploy -c docker-compose.yml djangoapp"  # deploy the app on the cluster

or 

$> docker-machine ssh myvm1 "docker login -u adeleh -p pwd docker stack deploy -c docker-compose.yml djangoapp"  # if image is private

$> docker-machine ssh myvm1 "docker stack ps djangoapp -f "desired-state=Running""  # show the distributed containers between the nodes of the cluster

Check out myvm_ip:8000

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