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README.md Update README Nov 16, 2017

README.md

Getting starting with Ansible with a Docker LAB 🐳

This repo is part of my blog post on geting started with Ansible and becoming a DevOps.

The LAB

The LAB is made of 3 containers to be managed by Ansible:

  • Docker Debian
  • Docker Ubuntu
  • Docker Centos

Plus a Docker Ansible, to have and avoid installing Ansible on your laptop.

Bootstrap Ansible LAB

To bootstrap this tutorial, I wrote and init script, by doing following tasks:

  • Delete previous 3 containers Debian, Ubuntu et Centos
  • Create an RSA key allowing Ansible connection through SSH
  • Starting 3 instances Docker Debian, Docker Ubuntu, and Docker Centos
  • Ssh key injection in each Docker instance using ssh-copy-id (password will be ask: toor)
  • Ansible hosts inventory creation

To "ping" our 3 nodes:

docker run -it --rm -v `pwd`/hosts:/etc/ansible/hosts -v `pwd`/id_rsa:/root/.ssh/id_rsa itwars/ansible-cli all -m ping
172.17.0.3 | SUCCESS => {
    "changed": false,
    "ping": "pong"
}
172.17.0.4 | SUCCESS => {
    "changed": false,
    "ping": "pong"
}
172.17.0.2 | SUCCESS => {
    "changed": false,
    "ping": "pong"
}

To setup Nginx on Debian Ansible node:

docker run -it --rm -v `pwd`/hosts:/etc/ansible/hosts -v `pwd`/id_rsa:/root/.ssh/id_rsa itwars/ansible-cli debian -m apt -a "name=nginx state=present"

To start Nginx on Debian Ansible node:

docker run -it --rm -v `pwd`/hosts:/etc/ansible/hosts -v `pwd`/id_rsa:/root/.ssh/id_rsa itwars/ansible-cli debian -m service -a "name=nginx state=started"