Ansible playbook - regexp | unable to change data in brackets and quotes

Question

I've been trying to finish up a playbook for deploying a new server. I'm struggling with changing data within brackets containing quotes via lineinfile and a regex:

- name: "Configuring: filebeat agent - configuring output to logstash"
  lineinfile:
    dest: "/etc/filebeat/filebeat.yml"
    regexp: '#hosts: ["localhost:5044"]'
    line: 'hosts: ["elk.home:5044"]'
  tags: application

After the playbook is executed, the desired line:

#hosts: ["localhost:5044"]

is not updated to reflect:

hosts: ["elk.home:5044"]

What I'm trying to achieve is:

#hosts: ["localhost:5044"] is replaced with hosts: ["elk.home:5044"]

There are no errors generated. I've tried varying " and ' along with escapes \ , but I can't get the expression correct. Any suggestions would be greatly appreciated!

Answer 1

Thanks seshadri_c and β.εηοιτ.βε!

I was able to reach a resolution with the following lines:

- name: "Configuring: filebeat agent - enabling logstash output hosts"
  lineinfile:
    dest: "/etc/filebeat/filebeat.yml"
    regexp: '#hosts: \["localhost:5044"\]'
    line: 'hosts: ["elk.home:5044"]'
  tags: 
    - configuration
    - application
    - filebeat

After completing the playbook, I had an issue with whitespace. I added two spaces that correctly modified the line

- name: "Configuring: filebeat agent - enabling logstash output hosts"
  lineinfile:
    dest: "/etc/filebeat/filebeat.yml"
    regexp: '#hosts: \["localhost:5044"\]'
    line: '  hosts: ["elk.home:5044"]'
  tags: 
    - configuration
    - application
    - filebeat