Inventory file in Ansible

Ansible Inventory File   |Ansible works against large no of systems   in your infrastructure at a same time.

You need to specify the details of these systems in some file.This file is called Ansible Inventory File .

By default the inventory file is located at /etc/ansible/hosts .To use other inventory file  we have to mention -i <path of inventory file> option at the time of execution .

You can change the default inventory file in the ansible configuration file.The default ansible configuration file located at /etc/ansible/ansible.cfg in which you can add or modify the variable to the newpath.

How to create basic inventory file

testnode1  ssh_user=root

testnode2  ssh_user=root

From the above example test node1 is the hostname of one remote machine.

By default ansible control machine connects to the remote node through ssh therefore ssh_user gives the ssh login name.Instead of the hostname of the remote server you can use ip address of the remote host also.

NOTE:If you not mention the ssh_user parameter ansible uses the same username from where you are going to run the script.

How to create Inventory file along with Groups

You can also create group using a set of systems in the ansible inventory file.This is required when you want to run a particular job for some systems and other job for other systems.

Here is the example like this.

[webserver]

Websvr1

websvr2

[dbserver]

Dbsvr1

In the above example webserver and dbserver are the group name which is defined in the square bracket.

Ansible Inventory File

When you want to add a file to all systems you need not have separate group you can do like this .

[server:children]

webserver

dbserver

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