Docker research

This repository contains a collection of various docker deploy flow experiments.

They cover everything from basic docker-compose setup to CI integrations and ansible orchestration.

Commands:

Docker-machine

• Create default virtualbox machine
  • docker-machine create --driver virtualbox default
• docker-machine ssh default
• docker-machine ls
• Show machine ip
  • docker-machine ip <name>
• eval "$(docker-machine env default)"

Docker compose

• Start containers
  • docker-compose up
• Run command on container
  • docker-compose run web django-admin.py startproject composeexample .
  • docker-compose run web python manage.py migrate
• Show containers
  • docker-compose ps
• Stop all containers
  • docker stop $(docker-compose ps -q)
• Rebuild images
  • docker-compose build
• Remove containers
  • docker rm $(docker-compose ps -q)
• Get container id by compose name
  • $(docker-compose ps -q <name>)
• Run exec by compose name
  • docker exec $(docker-compose ps -q <name>) ls -la

Docker

• Show running containers
  • docker ps
• Stop all containers
  • docker stop $(docker ps -a -q)
• Show all images
  • docker images
• Remove all images
  • docker rmi $(docker images -q)
• Remove all containers
  • docker rm $(docker ps -a -q)
• Remove all dangling images
  • docker images -q --filter "dangling=true" | xargs docker rmi
• Remove all stopped containers:
  • docker rm $(docker ps -a -q)
• Remove image
  • docker rmi <image id>
• Build image
  • docker build <imagename>
• Build image with reporo+tag
  • docker build -t <user>/<imagename>:<version> <path_to_image_dir> Example:
    • docker build -t marteinn/ansible-example-django:v1.0.0 django
• Run container in shell
  • docker exec -it <container_id> bash
• Run command on container
  • Example: docker exec <container_id> django-admin.py startproject composeexample .
  • Example: docker exec <container_id> web python manage.py migrate
• Keep the five most recent versions of an image (excluding latest)
  • docker images | grep marteinn/ansible-example-django | grep -v latest | sort -r | awk '{print "marteinn/ansible-example-django:"$2}' | tail -n +6 | xargs -n 1 docker rmi

TODO:

• (Done) Try setup with django and postgres
• (Done) Try setup with nginx, wsgi, uwsgi
• (Done) Try to package a application image
• (Done) Try setup with nginx, django, uwsgi and postgres
• (Done) Port a django project to docker
• (Done) Create a CI runner with Circle-CI and docker
• Test to run a multisite setup with reverse proxy
• Port a wp project to docker
• Research docker repository

Questions:

• Best practice when distributing files?
• How do I mount files to a image correctly?
• How do I perform Django migrations in a docker image?
  • Wrap migrate and web serve in a bash script called docker-entrypoint.sh
• Best practice when dealing with log-files?
• Best approach when debugging?
• How can I connect to a container directly?
  • docker exec -it <container_id> bash
• Best practise when dealing with .env files?

Experiment:

References

• https://docs.docker.com/engine/articles/dockerfile_best-practices/
• https://github.com/dockerfiles/django-uwsgi-nginx/blob/master/Dockerfile
• https://github.com/b00giZm/docker-compose-nodejs-examples/blob/master/05-nginx-express-redis-nodemon/docker-compose.yml
• http://anandmanisankar.com/posts/docker-container-nginx-node-redis-example/
• https://docs.docker.com/engine/articles/dockerfile_best-practices/
• https://docs.docker.com/mac/step_one/
• https://docs.docker.com/v1.8/installation/mac/
• http://crosbymichael.com/dockerfile-best-practices.html
• http://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/#connect-with-the-linking-system
• http://michal.karzynski.pl/blog/2015/04/19/packaging-django-applications-as-docker-container-images/
• https://github.com/jwilder/nginx-proxy
• http://jasonwilder.com/blog/2014/03/25/automated-nginx-reverse-proxy-for-docker/
• http://eyenx.ch/2015/04/18/loadbalancing-containers-with-docker-compose/
• https://realpython.com/blog/python/django-development-with-docker-compose-and-machine/
• http://mherman.org/blog/2015/03/06/node-with-docker-continuous-integration-and-delivery/#.VmCxyOPqiko
• http://www.carlboettiger.info/2014/08/29/docker-notes.html
• https://blog.codefresh.io/implementing-git-flow-with-dockers/