Chapter 8. About the installer inventory file

You can deprovision nodes and instance groups using the Ansible Automation Platform installer. Running the installer will remove all configuration files and logs attached to the nodes in the group.

To deprovision nodes, append node_state=deprovision to the node or group within the inventory file.

For example:

To remove a single node from a deployment:

[automationcontroller]
host1.example.com
host2.example.com
host4.example.com   node_state=deprovision

or

To remove an entire instance group from a deployment:

[instance_group_restrictedzone]
host4.example.com
host5.example.com

[instance_group_restrictedzone:vars]
node_state=deprovision

The second part of the example inventory file, following [all:vars], is a list of variables used by the installer. Using all means the variables apply to all hosts.

To apply variables to a particular host, use [hostname:vars]. For example, [automationhub:vars].

The values of string variables are declared in quotes. For example:

pg_database='awx'
pg_username='awx'
pg_password='<password>'

When declared in a :vars section, INI values are interpreted as strings. For example, var=FALSE creates a string equal to FALSE. Unlike host lines, :vars sections accept only a single entry per line, so everything after the = must be the value for the entry. Host lines accept multiple key=value parameters per line. Therefore they need a way to indicate that a space is part of a value rather than a separator. Values that contain whitespace can be quoted (single or double). For more information, see Python shlex parsing rules.

If a variable value set in an INI inventory must be a certain type (for example, a string or a boolean value), always specify the type with a filter in your task. Do not rely on types set in INI inventories when consuming variables.

If a parameter value in the Ansible inventory file contains special characters, such as #, { or }, you must double-escape the value (that is enclose the value in both single and double quotation marks).

For example, to use mypasswordwith#hashsigns as a value for the variable pg_password, declare it as pg_password='"mypasswordwith#hashsigns"' in the Ansible host inventory file.

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You can encrypt sensitive or secret variables with Ansible Vault. However, encrypting the variable names and the variable values makes it hard to find the source of the values. To circumvent this, you can encrypt the variables individually by using ansible-vault encrypt_string, or encrypt a file containing the variables.

You can further configure your Red Hat Ansible Automation Platform installation by including additional variables in the inventory file. These configurations add optional features for managing your Red Hat Ansible Automation Platform. Add these variables by editing the inventory file using a text editor.

A table of predefined values for inventory file variables can be found in Inventory file variables in the Red Hat Ansible Automation Platform Installation Guide.