Pass Ansible variables into custom Ansible module - ansible

Question

I have a custom module that resides in the library/ directory of my Ansible role. I can call the module from within my playbook, and the code executes correctly, but only if the values it expects are hardcoded in the module code itself. How can I pass values to the module from the playbook?
I've tried the following:
- name: Create repo and use specific KMS key
ecr_kms:
repositoryName: "new-ecr-repo"
encryptionConfiguration.kmsKey: 'my-kms-key-id"
and
- name: Create repo and use specific KMS key
ecr_kms:
repositoryName: "{{ repo_name }}"
encryptionConfiguration.kmsKey: "{{ kms_key_id }}"
Which I would expect to work, but neither does and, I get the following errors:
botocore.exceptions.ParamValidationError: Parameter validation failed:
Invalid length for parameter repositoryName, value: 0, valid min length: 2
Invalid length for parameter encryptionConfiguration.kmsKey, value: 0, valid min length: 1
The service module I'm trying to use
The code of the custom module:
#!/usr/bin/python
from urllib import response
import boto3
from jinja2 import Template
from ansible.module_utils.basic import AnsibleModule
def create_repo():
client = boto3.client('ecr')
response = client.create_repository(
#registryId='',
repositoryName='',
imageTagMutability='IMMUTABLE',
imageScanningConfiguration={
'scanOnPush': True
},
encryptionConfiguration={
'encryptionType': 'KMS',
'kmsKey': ""
}
)
def main():
create_repo()
if __name__ in '__main__':
main()

Answer 1

You do need to make your module aware of the arguments you want it to accept, so, in your main function:
#!/usr/bin/env python
from ansible.module_utils.basic import AnsibleModule
def create_repo(repositoryName, kmsKey):
# Call to the API comes here
def main():
module = AnsibleModule(
argument_spec = dict(
repositoryName = dict(type = 'str', required = True),
kmsKey = dict(type = 'str', required = True),
)
)
params = module.params
create_repo(
params['repositoryName'],
params['kmsKey']
)
if __name__ == '__main__':
main()
More can be found in the relevant documentation: Argument spec.
With this, your taks would be:
- name: Create repo and use specific KMS key
ecr_kms:
repositoryName: "{{ repo_name }}"
kmsKey: "{{ kms_key_id }}"
PS, word of advice: avoid using a dot in a YAML key, that would just be making your life complicated for no actual good reason.