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====== Ansible inventory ======


It is written in an INI or YAML format, lists host and groups.
Can be static of dynamic.

Convert a ini file to
  * JSON : <code>ansible-inventory -i /etc/ansible/hosts --list</code>
  * YAML : <code>ansible-inventory -i /etc/ansible/hosts --list --yaml</code>

You can add **--vars** to add associated variable for each group/hosts

Example of Collection of groups Dev:children
<cli prompt='#'>
# cat /etc/ansible/hosts
[managedClients]
[RHEL_Dev]
lab-rhel-1
lab-rhel-2

[AIX_Dev]
lab-aix-1
lab-aix-2

[Dev:children]
RHEL_Dev
AIX_Dev
</cli>

<cli prompt='#'>
# ansible-inventory --graph
@all:
  |--@Dev:
  |  |--@AIX_Dev:
  |  |  |--lab-aix-1
  |  |  |--lab-aix-2
  |  |--@RHEL_Dev:
  |  |  |--lab-rhel-1
  |  |  |--lab-rhel-2
  |--@local:
  |  |--localhost
</cli>

<cli prompt='#'>
# cat /etc/ansible/hosts
[managedClients]
[RHEL_Dev]
lab-rhel-1 ansible_user=ansible
lab-rhel-2 ansible_port=22

[AIX_Dev]
lab-aix-1  ansible_host=10.1.1.1
lab-aix-2

[Dev:children]
RHEL_Dev
AIX_Dev
</cli>

<cli prompt='#'>
# ansible-inventory –list
….
 "hostvars": {
            "lab-aix-1": {
                "ansible_host": "10.1.1.1"
            }, 
            "lab-rhel-1": {
                "ansible_user": "ansible"
            }, 
            "lab-rhel-2": {
                "ansible_port": 22
            }
….
</cli>

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