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   lineinfile:     dest: "{{ inv_path }}"     insertafter: '^\[{{role}}\]$'     line: "{{new_host}}"   when: check_inv.rc == 0

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