6. Ansible+Docker+Vagrant

This is a experiment to see how to provision and transfer images to a vagrant box using ansible.

Playbooks

• prepare_server.yml
  • Installs aufs driver for ubuntu
  • Hardens the server (firewall, auth...)
  • Installs docker
• setup.yml
  • Download and start postgres container
  • Add config for nginx
• deploy.yml
  • Retrive app version
  • Build app image
  • Transfer app image to remote
  • Stop and remove previous app container
  • Tag new image as 'latest'
  • Clear up old releases
  • Start app container
  • Start/restart nginx container

Snippets

• Connect to vagrant using ssh

  • ssh $(vagrant ssh-config | awk '{print " -o "$1"="$2}') localhost (alt to vagrant ssh)

• Transfer local image to remote

  • docker save <image_id> | bzip2 | ssh $(vagrant ssh-config | awk '{print " -o "$1"="$2}') localhost 'bunzip2 | docker load'

• Transfer local image to remote (with progress)

  • docker save <image_id> | bzip2 | pv | ssh $(vagrant ssh-config | awk '{print " -o "$1"="$2}') localhost 'bunzip2 | docker load'

• Run deploy playbook

ansible-playbook ./ansible/deploy.yml -i .vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory -u vagrant

• Ping vagrant machine

ansible all -m ping -i .vagrant/provisioners/ansible/inventory/vagrant_ansible_inventory -u vagrant

References

Docker save/load

• https://opensolitude.com/2015/05/26/building-docker-images-with-ansible.html
• https://realguess.net/2015/02/04/docker-save-load-and-deploy/
• http://tuhrig.de/difference-between-save-and-export-in-docker/

Provisioning

• http://www.hiddentao.com/archives/2014/06/03/shippable-ansible-docker-loggly-for-awesome-deployments/

Alt deployment procedures

• http://blog.ionic.io/docker-hot-code-deploys/