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Ansible : Use Playbook (notify)2023/08/01

 

To use [notify], [handlers], it's possible to execute a task which is defined in [handlers] after a task completed which has [notify] method.

[1] For example, create a Playbook that [sshd] is restarted after editing [sshd_config].
debian@dlp:~$
vi playbook_sample.yml
- hosts: target_servers
  become: yes
  become_method: sudo
  handlers:
  - name: restart sshd
    service: name=ssh state=restarted
  tasks:
  - lineinfile:
      path: /etc/ssh/sshd_config
      regexp: '^PermitRootLogin'
      line: 'PermitRootLogin no'
    notify: restart sshd
    tags: Edit_sshd_config

debian@dlp:~$
ansible-playbook playbook_sample.yml --ask-become-pass

BECOME password:

PLAY [target_servers] **********************************************************

TASK [Gathering Facts] *********************************************************
ok: [10.0.0.52]
ok: [10.0.0.51]

TASK [lineinfile] **************************************************************
changed: [10.0.0.52]
changed: [10.0.0.51]

RUNNING HANDLER [restart sshd] *************************************************
changed: [10.0.0.51]
changed: [10.0.0.52]

PLAY RECAP *********************************************************************
10.0.0.51                  : ok=3    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0
10.0.0.52                  : ok=3    changed=2    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

# verify

debian@dlp:~$
ansible target_servers -m command -a "grep '^PermitRootLogin' /etc/ssh/sshd_config" -b --ask-become-pass

BECOME password:
10.0.0.52 | CHANGED | rc=0 >>
PermitRootLogin no
10.0.0.51 | CHANGED | rc=0 >>
PermitRootLogin no
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