How to create Ansible Playbook on Centos7

To create Ansible Playbook on Centos7

Introduction:

Ansible Playbook is a blueprint of automation tasks that allows a repeatable, reusable, easy configuration management and multi-machine deployment system, one that is fully adapted to expanding complex applications. If you need to execute a task with Ansible more than once, write a playbook and installed it below source control. Then we can use the playbook to push out new configurations or confirm the configuration of remote systems.

Procedure:

Check the OS version by using the following command:

[root@linuxhelp ~]# lsb_release -d
Description:	CentOS Linux release 7.6.1810 (Core) 

Open the hosts file and add the client host Ip:

[root@linuxhelp ~]# vi /etc/ansible/hosts 

Create a directory for Playbook:

[root@linuxhelp ~]# mkdir playbook

Switch to playbook directory:

[root@linuxhelp ~]# cd playbook/

Create a yaml file for playbook:

[root@linuxhelp playbook]# vi test_playbook.yaml

Check the syntax of the yaml file by using following command:

[root@linuxhelp playbook]# ansible-playbook test_playbook.yaml --syntax-check
playbook: test_playbook.yaml

Execute the playbook file by using following command:

[root@linuxhelp playbook]# ansible-playbook test_playbook.yaml
PLAY [Test playbook] ***********************************************************
TASK [Gathering Facts] *********************************************************
ok: [Client]
TASK [Get hostname] ************************************************************
changed: [Client]
PLAY RECAP *********************************************************************
Client                     : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

Once completed execute the following command to see the details of the executed file:

[root@linuxhelp playbook]# ansible-playbook test_playbook.yaml -v
Using /etc/ansible/ansible.cfg as config file
PLAY [Test playbook] ***********************************************************
TASK [Gathering Facts] *********************************************************
ok: [Client]
TASK [Get hostname] ************************************************************
changed: [Client] => {"changed": true, "cmd": ["hostname"], "delta": "0:00:00.007324", "end": "2021-03-30 15:32:44.308257", "rc": 0, "start": "2021-03-30 15:32:44.300933", "stderr": "", "stderr_lines": [], "stdout": "localhost.localdomain", "stdout_lines": ["localhost.localdomain"]}
PLAY RECAP *********************************************************************
Client                     : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   

Add one more “v” at the end of the command to see more details:

[root@linuxhelp playbook]# ansible-playbook test_playbook.yaml -vv
ansible-playbook 2.9.18
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 2.7.5 (default, Oct 30 2018, 23:45:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)]
Using /etc/ansible/ansible.cfg as config file
Skipping callback 'actionable', as we already have a stdout callback.
Skipping callback 'counter_enabled', as we already have a stdout callback.
Skipping callback 'debug', as we already have a stdout callback.
.
.
.
.

Add one more “v” at the end of the command to see more details:

[root@linuxhelp playbook]# ansible-playbook test_playbook.yaml -vvv
ansible-playbook 2.9.18
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/site-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 2.7.5 (default, Oct 30 2018, 23:45:53) [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)]
Using /etc/ansible/ansible.cfg as config file
host_list declined parsing /etc/ansible/hosts as it did not pass its verify_file() method
script declined parsing /etc/ansible/hosts as it did not pass its verify_file() method
auto declined parsing /etc/ansible/hosts as it did not pass its verify_file() method
Parsed /etc/ansible/hosts inventory source with ini plugin
Skipping callback 'actionable', as we already have a stdout callback.
Skipping callback 'counter_enabled', as we already have a stdout callback.
Skipping callback 'debug', as we already have a stdout callback.
Skipping callback 'dense', as we already have a stdout callback.
Skipping callback 'dense', as we already have a stdout callback.
Skipping callback 'full_skip', as we already have a stdout callback.
.
.
.
.

With this method creation of Ansible playbook on Centos 7 comes to an end.