Question: After reviewing this amazing forum, i thought it's time to join in...

I'm having issue with a playbook that deploys multiple Dockers.

* My **Ansible** version is: 2.5.1
* My **Python** version is 3.6.9
* My Linux Images are 18.04 from the site: **OSboxes**.

Docker service is installed and running on both of the machines.

According to this website, all you need to do is follow the instructions and everything will work perfectly. :)

<https://www.techrepublic.com/article/how-to-deploy-a-container-with-ansible/>

**(The playbook i use is in the link above)**

but after following the steps, and using the playbook, i've got this error.

```
TASK [Pull default Docker image] ******************************************************************************************************
fatal: [192.168.1.38]: FAILED! => {"changed": false, "msg": "Unsupported parameters for (docker_image) module: source Supported parameters include: api_version, archive_path, buildargs, cacert_path, cert_path, container_limits, debug, docker_host, dockerfile, filter_logger, force, http_timeout, key_path, load_path, name, nocache, path, pull, push, repository, rm, ssl_version, state, tag, timeout, tls, tls_hostname, tls_verify, use_tls"}

```

I'll be happy for your support on this issue.

Answer: 
So according to the [doc of `docker_image`](https://docs.ansible.com/ansible/2.5/modules/docker_image_module.html#docker-image-module) module of Ansible 2.5, there is indeed no parameter `source`.

Nevertheless, the [doc of version 2.9](https://docs.ansible.com/ansible/2.9/modules/docker_image_module.html?highlight=docker) tells us it has been "added in 2.8"! So you have to update you Ansible version to be able to run the linked playbook as-is. That's you best option.

Otherwise, another option would be to keep your version 2.5 and simply remove the line 38.

```
(-)        source: pull

```

But I don't know how was the default behaviour before 2.8, so I cannot garanty you that it will do what you expect!
According the error message in Ansible module `docker_image` a parameter seems to be used, which is not part of the parameters implemented for that module (yet). Also the error message lists already the parameter which are available. Same as in the [documentation for the module](https://docs.ansible.com/ansible/latest/collections/community/general/docker_image_module.html).

An other possible reason might be that the line indent for some of the parameters isn't correct.