linematch.yml

---
# vim: set ft=ansible:
- name: matching line
  vars:
    stdout_lines:
      - ""
      - ""
      - "db_instance                               : localhost"
      - "db_type                                   : mongoDB"
      - "db_user                                   : "
      - "db_pass                                   : "
      - "eventlog_enable                           : 1"
      - "scan_result_log_enable                    : 0"
      - "syslog_enable                             : 0"
      - "syslog_ip                                 : "
      - "syslog_port                               : "
      - "syslog_facility                           : "
  gather_facts: no
  hosts: localhost
  tasks:
    - debug:
        msg: "{{ item }}"
      with_items: "{{ stdout_lines }}"
      when: item.startswith('scan_result_log_enable')