# How Ansible knows whether a docker image has changed?

**URL:** <https://forum.ansible.com/t/how-ansible-knows-whether-a-docker-image-has-changed/18573>\
**Category:** Ansible Project\
**Created:** [June 23, 2015, 10:37am UTC](https://forum.ansible.com/t/how-ansible-knows-whether-a-docker-image-has-changed/18573 "2015-06-23T10:37:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dr\_Hector\_Valverde\_P](https://avatars.discourse-cdn.com/v4/letter/d/85e7bf/32.png) [@Dr\_Hector\_Valverde\_P](https://forum.ansible.com/u/Dr_Hector_Valverde_P)\
**Post date:** [June 23, 2015, 10:37am UTC](https://forum.ansible.com/t/how-ansible-knows-whether-a-docker-image-has-changed/18573/1 "2015-06-23T10:37:12Z")

</div>

Hi all,

I’m using the [Docker module Ansible provides](http://docs.ansible.com/docker_module.html) and I’m currently facing a little problem with it. I need further information to find the solution.

Here is the task I’m using in the playbook:

`

- name: Run the docker container for the service in QA  
docker:  
docker\_api\_version: “1.17”  
name: “{{ service }}”  
image: “{{docker\_image\_uri}}:{{ docker\_tag }}”  
env: “{{ ENV\_VARS }}”  
state: reloaded  
pull: always  
ports: “{{http\_port}}:5000”  
`

I’m using exactly the same code for 4 different services I’m deploying but I have the following problem with two of them:

**The docker container is always reloaded regardless the docker image has changed or not**

Given that situation, I need to understand how Ansible makes the decision to restart the container or not.

I hope I’ve been clear enough in my question. Any insight?

Thanks in advance.

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