A simple Ansible plug-in for Juju environments. juju-ansible allows you to use Ansible modules and playbooks with machines you have deployed with Juju.

Juju is unmatched at orchestrating services with complex configuration inter-dependencies that just work.

Ansible is a simple and powerful tool for distributing ad-hoc, low-level system administration tasks to a large number of machines over ubiquitous SSH.

With their powers combined, you can have opinionated deployments that just work, and then easily go customize and administer them.

Juju and Ansible both need to be installed on your system and in your $PATH.

Then copy 'juju-ansible' into your $PATH.

For playbook support, make a symbolic link 'juju-ansible-playbook' to 'juju-ansible'.

juju-ansible builds a dynamic inventory from the status of your current Juju environment. All other arguments are passed on to Ansible:

$ juju ansible <group> [ansible arguments...]
$ juju ansible-playbook [ansible-playbook arguments...]

Or use juju-ansible as a dynamic inventory script:

$ ansible all -i /path/to/juju-ansible ...

Groups are currently defined for each service and series.

Let's say I have a wordpress and mysql service deployed with Juju in my current environment. I can run Ansible modules like:

$ juju ansible all -m ping
$ juju ansible all -m shell -a "uptime"
$ juju ansible mysql -m shell -a "mysqladmin extended-status"

Or run a playbook (if I created the juju-ansible-playbook symlink above) with:

$ juju ansible-playbook sched-maint.yml -vvv --sudo

I've only tested juju-ansible with an OpenStack Juju environment. YMMV, but let me know how it goes if you try something else.

More groups (by unit, distribution, interface, etc.) and hostvars from charm configuration parameters. Iterating on your much appreciated feedback. What else?

GPLv3. Copyright (c) 2013, Canonical Ltd.