How to use external variable inside an ansible inventory file.

[anoop....@tarams.com]

Hi,

I have an inventory file 'inventory/localhost' and contains;

[localhost]

"{{MYSITE_NAME}}-local.com"    ansible_ssh_port=2222

Lets say 'MYSITE_NAME' is a variable defined in some file. I need to access this inside my inventory file. Please suggest some solution.

[anoop....@tarams.com]

Any suggestion guys??

[pixel fairy]

theres probably an easier way, but since your setting up for a dynamic inventory, you might as well use it.

http://docs.ansible.com/ansible/developing_inventory.html

heres an example in python for lxc containers.

#!/usr/bin/env python

import yaml
import json

with open('containers.yml') as fp:
    c = yaml.load(fp)
containers = c['containers']

inventory = {
    'containers': { 'hosts': [] },
    '_meta': { 'hostvars': {} }
}

for k, v in containers.items():
    inventory['containers']['hosts'].append(k)
    if 'groups' in v:
        for group in v['groups']:
            if group not in inventory:
                inventory[group] = { 'hosts':[] }
            inventory[group]['hosts'].append(k)
    inventory['_meta']['hostvars'][k] = {}
    inventory['_meta']['hostvars'][k]['ansible_ssh_host'] = v['address']

print(json.dumps(inventory,indent=2))

and the containers,

containers:
  vpn:
    address: 192.168.114.4
    forwards:
    - { transport: udp, host: 1194, container: 1194 }
  reverseproxy:
    address: 192.168.114.10
    forwards:
    - { transport: tcp, host: 80, container: 80 }
    - { transport: tcp, host: 443, container: 443 }
  web1:
    hostname: web1.example.lan
    address: 192.168.114.11
    cnames:
    - moreweb.example.lan
    - another.example.lan
    groups:
      - web
  web2:
    hostname: web2.example.lan
    address: 192.168.114.12
    groups:
      - web