Runlevel 0

[ratmav]

Use Ansible to install Docker 1.9 on all hosts in a hostgroup defined in ansible_hosts. We need to be able to support CentOS 7 and Ubuntu 14.04.

[ratmav]

Feedback from @GiorgioRegni:

• Don't branch, run directly in master.
• We need to ask the user for input as little as possible in general.

TODO:

• [x] Set host OS in Ansible inventory for a more automated process (#4).
• [x] Remove bashrc.template, will add envars to shell config via script.
• [x] Update README w/ Ansible install steps: Using a source pull is OK, as long as the process is scripted. (#3)
• [x] Add a note to the top of the README to notify users that SSH key-based authentication must be set up (i.e. a public key already in authorized_keys on the target machine).

[ratmav]

Ansible setup script is present, which support for Ubuntu Server 14.04 LTS and CentOS 7, and the README has been updated. The playbooks also have support for a base_os variable, which is used for determining platform-specific plays (actions). Is there anything else I need to add for runlevel 0, @GiorgioRegni?

[ratmav]

I've made changes to the Ansible install script as outlined in #3, but there may be some more changes to both issues depending on feedback @GiorgioRegni gets from the rest of the team.

[ratmav]

In order to use Ansible's Docker module, the docker-py PIP package (which requires PIP) must be installed on the target host. I've updated the playbooks to install PIP and docker-py, but they still need some testing.

Also, Docker has to be chkconfigd on and manually started the first time on CentOS 7.

[ratmav]

docker-py and PIP are now installed on target hosts, tested on my Ubuntu 14.04 and CentOS 7 local VM's.

[ratmav]

Got the go-ahead yesterday to close this. Any changes past this point can be a new issue.