Save shell command output to ansible variable

 1[root@lampp lampp]# cat test.yml
 2---
 3- name: LAMPP Dev (MySQL/CentOS7)
 4  hosts: 127.0.0.1
 5  connection: local
 6  become: true
 7 
 8  tasks:
 9    - name: Get the mysql root default password
10      command: awk '/temporary password/ {print $NF}' /var/log/mysqld.log
11      register: command_output
12 
13    - set_fact:
14        default_mysqlroot_password: "{{ command_output.stdout }}"
15 
16    ## NOTE: debug line below is only to show output in ansible-playbook run
17    - debug: msg="{{ default_mysqlroot_password }}"```

 1[root@lampp lampp]# ansible-playbook test.yml
 2 [WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'
 3 
 4 
 5PLAY [LAMPP Dev (MySQL/CentOS7)] ****************************************************************************************************************
 6 
 7TASK [Gathering Facts] *********************************************************************************************************************************
 8ok: [127.0.0.1]
 9 
10TASK [Get the mysql root default password] *************************************************************************************************************
11changed: [127.0.0.1]
12 
13TASK [set_fact] ****************************************************************************************************************************************
14ok: [127.0.0.1]
15 
16TASK [debug] *******************************************************************************************************************************************
17ok: [127.0.0.1] => {
18    "msg": "712xa1dl"
19}
20 
21PLAY RECAP *********************************************************************************************************************************************
22127.0.0.1                  : ok=4    changed=1    unreachable=0    failed=0

1- set_fact:
2    string_to_echo: "{{ command_output.stdout }}"