Replace a line in a config file with ansible

Question

I am new to ansible.

Is there a simple way to replace the line starting with option domain-name-servers in /etc/dhcp/interface-br0.conf with mo

Answer 1

You can use Replace Module. Please refer to http://docs.ansible.com/ansible/latest/modules/replace_module.html.

#example
vim httpd-replace-hostname.yml

---
- hosts: 
  tasks:
  - name: hostname was used instead of path.
    replace:
      path: /etc/hosts
      regexp: '(\s+)old\.name\.com(\s+.*)?$'
      replace: '\new.name.com\2'
      backup: yes

Run

ansible-playbook httpd-replace-hostname.yml

You can check out the result successfully as below.

PLAY [Your hosts] ***************************************************************************************************************************************************************

TASK [Gathering Facts] **********************************************************************************************************************************************************
ok: [hostname.name.com]

TASK [hostname was used instead of path.] ***************************************************************************************************************************************
ok: [hostname.name.com]

TASK [Replace after the expression till the end of the file] ********************************************************************************************************************
changed: [hostname.name.com]

PLAY RECAP **********************************************************************************************************************************************************************
hostname.name.com : ok=3    changed=1    unreachable=0    failed=0