Setup Ansible dev environment with docker on Mac

Ansible-Docker.md

Example setup on Mac

Prepare docker vm

People can use boot2docker or docker machine to provison a docker vm , I would like use vagrant myself to better understand the architecture.

install vagrant & vbox (5.0.3) https://www.virtualbox.org/download/testcase/VirtualBox-5.0.3-102165-OSX.dmg

Use attached Vagrantfile to provision jessie64

Put it into your vm dir , eg. ~/dev/vm/jessie and then

cd ~/dev/vm/jessie && vagrant up

~vm$ sudo echo 'deb http://http.debian.net/debian-backports squeeze-backports(-sloppy) main' > /etc/apt/sources.list.d/backports.list

~vm$ sudo apt-get update && sudo apt-get install docker.io && sudo gpasswd -a vagrant docker && sudo service docker restart

create dockervm.command as attached and drag it into OSX dock

Prepare your docker images with tutum sshd images

Build debian image

git clone https://github.com/tutumcloud/tutum-debian

vi wheezy/Dockerfile

add line "apt-get install -y python" and save

docker build -t local/debian wheezy/

Build centos image

git clone https://github.com/tutumcloud/tutum-centos

docker build -t local/centos centos6

Prepare ssh key

ssh-keygen -t rsa -b 4096 -C "ansible@local"

Specify the file name as ~/.ssh/docker.pem

Start sshd linux images

docker run --name dev -d -p 2222:22 -e AUTHORIZED_KEYS="cat ~/.ssh/docker.pem.pub" local/debian

docker run --name dev2 -d -p 2224:22 -e AUTHORIZED_KEYS="cat ~/.ssh/docker.pem.pub" local/centos

docker ps

Prepare your ansible setting

mkdir ~/dev/work

Use ansible.cfg and inventory file as attached

test setting with

ansible -m ping all

Use the attached test.yaml to verify docker instance configuration

ansible.cfg

[defaults]
host_key_checking=False
gathering=explicit
inventory=./inventory
private_key_file=~/.ssh/docker.pem 

dockervm.command

#!/bin/bash

cd ~/dev/vm/jessie

if ! nc -z 127.0.0.1 2222
then
    /usr/local/bin/vagrant up
fi

/usr/local/bin/vagrant ssh

inventory

[test]
test1 ansible_ssh_host=127.0.0.1 ansible_ssh_port=2222 ansible_ssh_user=root

test2 ansible_ssh_host=127.0.0.1 ansible_ssh_port=2224 ansible_ssh_user=root

test.yml

---

- hosts: test 

  sudo: no
  gather_facts: yes
  tasks:
    - apt: name='wget' state=present
      when: ansible_os_family == "Debian"

    - yum: name='wget' state=present
      when: ansible_os_family == "RedHat"

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

  config.vm.box = "debian/jessie64"

  config.vm.box_check_update = false

  config.vm.hostname = "docekrdev"
  config.vm.network "private_network", ip: "192.168.0.3"
  config.vm.network "forwarded_port", guest: 8080, host: 8080

  config.vm.synced_folder ".", "/vagrant", mount_options: ["dmode=775","fmode=666"]
  config.vm.synced_folder "~/dev", "/home/vagrant/dev", mount_options: ["dmode=775","fmode=666"]

  #config.vm.network "public_network"

  # If true, then any SSH connections made will enable agent forwarding.
  # Default value: false
  # config.ssh.forward_agent = true


  config.vm.provider "virtualbox" do |vb|

     vb.customize ["modifyvm", :id, "--memory", "2048"]
     #vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
  end

end

Hi there. I can't understand this line. How does this works? Where do I have to put the inventory file? The hosts file is omitted, why?

As my ansible.cfg defined , inventory=./inventory , and example inventory also included in this gist .
You should able to run this example with below file structure
./ansible.cfg
./test.yml
./inventory