enhanced comment parsing config_template https://review.opendev.org/#/c/672170

input.ini

[DEFAULT]

#
# From nova.conf
#

#
# Availability zone for internal services. For more information, refer to the
# documentation. (string value)
#internal_service_availability_zone = internal

#
# Default availability zone for compute services. For more information, refer to
# the documentation. (string value)
#default_availability_zone = nova

#
# Default availability zone for instances. For more information, refer to the
# documentation. (string value)
#default_schedule_zone = <None>

# Length of generated instance admin passwords (integer value)
# Minimum value: 0
#password_length = 12

#
# Time period to generate instance usages for. It is possible to define optional
# offset to given period by appending @ character followed by a number defining
# offset. For more information, refer to the documentation. (string value)
#instance_usage_audit_period = month

output.ini

[DEFAULT]
#
# From nova.conf
#
#
# Availability zone for internal services. For more information, refer to the
# documentation. (string value)
#internal_service_availability_zone = internal

#
# Default availability zone for compute services. For more information, refer to
# the documentation. (string value)
#default_availability_zone = nova

#
# Default availability zone for instances. For more information, refer to the
# documentation. (string value)
#default_schedule_zone = <None>

# Length of generated instance admin passwords (integer value)
# Minimum value = 0
#password_length = 12
password_length = 100

#
# Time period to generate instance usages for. It is possible to define optional
# offset to given period by appending @ character followed by a number defining
# offset. For more information, refer to the documentation. (string value)
#instance_usage_audit_period = month
instance_usage_audit_period = blah blah blah

test = valuetest

[TestSection]
things = stuff

test-playbook.yml

- name: test
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
    - config_template:
        src: input.ini
        dest: output.ini
        config_overrides:
          DEFAULT:
            test: valuetest
            password_length: 100
            instance_usage_audit_period: blah blah blah
          TestSection:
            things: stuff
        config_type: ini