How can I print variables declared only at group_vars, host_vars without ansible facts?
such code is good:
- name: "Ansible | List all known variables and facts"
debug:
var: hostvars[inventory_hostname]
But I don't need host IPs,disks, etc.
I mean to check all my variables one more time before continue to execute Play.
There are 3 categories of variables: ansible facts, special variables, and user's variables. Remove both ansible facts and special variables from hostvars and what is left are user's variables. The list of the ansible facts is available in the variables ansible_facts. The list of the special variables must be created (I think).
Create a list of special variables
If you run the playbook below you'll see the list of the special variables and user's variables
- hosts: localhost
tasks:
- debug:
msg: "{{ hostvars[inventory_hostname]|
difference(ansible_facts) }}"
Eliminate the user's vars and put the list of the special variables into a file. For example
shell> cat special_vars.yml
special_vars:
- ansible_python_interpreter
- ansible_connection
- inventory_hostname
...
This list of special variables might be not complete and will serve the purpose of this host only.
Remove ansible facts and special variables from hostvars
- hosts: localhost
vars_files:
- special_vars.yml
tasks:
- set_fact:
user_var1: AAA
- debug:
msg: "{{ hostvars[inventory_hostname]|
difference(ansible_facts)
difference(special_vars) }}"
gives the list of user's variables only
msg:
- user_var1
The user's variables will include also the configuration variables set by the user (e.g. connection variables: ansible_user or priviledge escalation: ansible_become).
Name-space
A better practice is to "name-space" variables. For example
- hosts: localhost
vars:
prj51_var1: AAA
prj51_var2: BBB
tasks:
- debug:
msg: "{{ item }}: {{ query('vars', item)|first }}"
loop: "{{ query('varnames', 'prj51_.+$') }}"
gives
msg: 'prj51_var1: AAA'
msg: 'prj51_var2: BBB'