Ansible: how to construct a variable from another variable and then fetch it's value

Question

Here is my problem I need to use one variable \'target_host\' and then append \'_host\' to it\'s value to get another variable name whose value I need. If you look at my pl

Answer 1

You have two ways to choose:
1. General using.

vars:
    - target_host: smtp
    - smtp: smtp.max.com
tasks: 
    - name: testing
        debug: msg={{ target_host }}
    - name: testing
        debug: msg={{ smtp }}
    - name: testing
        debug: msg={{ vars[target_host] }}

2. Using fact

tasks: 
    - set_fact: target_host=smtp
    - set_fact: smtp=smtp.max.com
    - name: testing
        debug: msg={{ target_host }}
    - name: testing
        debug: msg={{ smtp }}
    - name: testing
        debug: msg={{hostvars[inventory_hostname][target_host]}}