match a specific word within square brackets using regex

Question

I have a file /home/ec2-user/hosts in which there is a group called [sample_word_test] with the square brackets and I want to add an Ip address under this group using ansible playbook. I want to match [sample_word_test] using lineinfile regex expression and add Ip address under that matching group

Following is my playbook code

lineinfile:
    path: /home/ec2-user/hosts
    regexp: "\[.*?sample_word_test.*$\]"
    line: "{{ new_server_ip }}"
    backup: yes

Answer 1

The very simple solution is to use ini_file. The task below does what is requested.

- ini_file:
    path: /home/ec2-user/hosts
    section: sample_word_test
    option: "{{ new_server_ip }}"
    allow_no_value: yes
    backup: yes

For example

$ cat hosts
[all]
test1
test2

[sample_word_test]
192.168.1.99