Use lineinfile to fill ansible inventory file -
i have trivial task fill particular ansible inventory file new deployed vms names under roles. here playbook: - hosts: 127.0.0.1 tasks: - name: add host inventory file lineinfile: dest: "{{inv_path}}" regexp: '^\[{{role}}\]' insertafter: '^#\[{{role}}\]' line: "{{new_host}}" instead of adding new line after [role], ansible replace string hostname. aim naturally insert after it. if there no matched role should skip add new line. how achieve this? thanks! [role] getting replaced because regexp parameter regular expression ansible replace line parameter. move value insertafter , rid of regexp . as other requirement need task check if [role] exists first. lineinfile task evaluate result of checker task determine if should run. - name: check if role in inventory file shell: grep [{{ role }}] {{ inv_path }} ignore_errors: true register: check_inv - name: add host inventory file
