Dynamic inventory generation for Ansible

Author: Giuseppe Paterno' [email protected] Derived from a script by [email protected]

This Python script generates a dynamic inventory based on OpenStack instances if passed without arguments.

It is capable of setting ansible common variables (user and if to use sudo) and to set role(s) to given servers. These roles turns into group when passed to ansible.

The script is passed via "-i" to ansible-playbook. Ansible Example: ansible -i ./openstack_inventory.py all -m ping

Usage

usage: openstack_inventory.py [-h] [--sudo] [--no-sudo] [--user USER]
                              [--no-user] [--role ROLE] [--no-roles] [--list]
                              [server [server ...]]

Process ansible inventory

positional arguments:
  server       openstack server instance

optional arguments:
  -h, --help   show this help message and exit
  --sudo       Turn on sudo in Ansible
  --no-sudo    Turn off sudo in Ansible
  --user USER  User used in Ansible to connect
  --no-user    Remove default user for host
  --role ROLE  Set role to server (can use multiple times)
  --no-roles   Delete all roles from server
  --list       List inventory

Requirements

• Python: novaclient, openstackclient
• The environment variables OS_USERNAME, OS_PASSWORD, OS_TENANT_NAME, OS_AUTH_URL must be set according to nova.

Example metadata set

Set the metadata directly with the openstack client

openstack server set --property ansible_host_vars="ansible_ssh_user->centos;ansible_sudo->yes" instance_name
openstack server set --property roles="base,db" instance_name