# run task only if changed **URL:** \ **Category:** Ansible Project\ **Tags:** rhel\ **Created:** [June 6, 2018, 2:24pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720 "2018-06-06T14:24:45Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![cava\_cavamagie](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@cava\_cavamagie](https://forum.ansible.com/u/cava_cavamagie)\ **Post date:** [June 6, 2018, 2:24pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/1 "2018-06-06T14:24:45Z")
i have to run a playbook that can set the repository rh for a lot o machine - name: RH Enable repositories rhsm\_repository: name: ‘{{ item.name }}’ state: ‘{{ item.state }}’ with\_items: ‘{{ IBM\_l6\_R\_RH7\_rhsm\_repository }}’ when: ansible\_distribution\_major\_version == “7” vars: IBM\_l6\_R\_RH7\_rhsm\_repository: \> {{ IBM\_l6\_R\_RH7\_rhsm\_repository\_default + IBM\_l6\_R\_RH7\_rhsm\_repository\_host + IBM\_l6\_R\_RH7\_rhsm\_repository\_group }} register: result this i i the main.yml in the default IBM\_l6\_R\_RH7\_rhsm\_repository\_default: - name: rhel-7-server-extras-rpms state: enabled - name: rhel-7-server-optional-rpms state: enabled - name: rhel-7-server-rpms state: enabled - name: rhel-7-server-supplementary-rpms state: enabled - name: rhel-7-server-thirdparty-oracle-java-rpms state: enabled IBM\_l6\_R\_RH7\_rhsm\_repository\_host: IBM\_l6\_R\_RH7\_rhsm\_repository\_group: all works but take a very long time to verify how i can make the task if i want to run the task if only the variabiles is changed? with fact? this task is a part of a playbook who run several time in a day someone can help me?? ---
**Author:** ![Tchia04](https://avatars.discourse-cdn.com/v4/letter/t/fbc32d/32.png) [@Tchia04](https://forum.ansible.com/u/Tchia04)\ **Post date:** [June 7, 2018, 5:44pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/2 "2018-06-07T17:44:17Z")
In general, you can add “when: results.changed” to a task to run only if the previous task has changed. You can use “changed\_when:” to customize the output if the default output from task is not what you want ---
**Author:** ![Karl\_Auer](https://avatars.discourse-cdn.com/v4/letter/k/cc9497/32.png) [@Karl\_Auer](https://forum.ansible.com/u/Karl_Auer)\ **Post date:** [June 7, 2018, 5:49pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/3 "2018-06-07T17:49:43Z")
There’s a lot of stuff in the AWS modules that “changes” for no apparent reason, and where no actual change has occurred. I have given up relying on it, and explicitly test items I think may have changed. It would be really nice if all the AWS modules could accurately tell whether something had actually changed. ec2\_group is especially bad. Regards, K. ---
**Author:** ![cava\_cavamagie](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@cava\_cavamagie](https://forum.ansible.com/u/cava_cavamagie)\ **Post date:** [June 8, 2018, 1:45pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/4 "2018-06-08T13:45:40Z")
because the main idea is to write the result in a fact but the problem is that i want to maintain the fact between varios run example i set the first time a value example an ntp and set a fact ntp\_set: true and every run if i read the ntp\_set = ture it escape the task but i lost the value of the fact between the run ---
**Author:** ![Tchia04](https://avatars.discourse-cdn.com/v4/letter/t/fbc32d/32.png) [@Tchia04](https://forum.ansible.com/u/Tchia04)\ **Post date:** [June 8, 2018, 8:28pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/5 "2018-06-08T20:28:20Z")
Maybe you can try using the creates parameters in the shell module ([https://docs.ansible.com/ansible/latest/modules/shell\_module.html](https://docs.ansible.com/ansible/latest/modules/shell_module.html)) creates - a filename, when it already exists, this step will not be run. ---
**Author:** ![Kai\_Stian\_Olstad](https://avatars.discourse-cdn.com/v4/letter/k/e19adc/32.png) [@Kai\_Stian\_Olstad](https://forum.ansible.com/u/Kai_Stian_Olstad)\ **Post date:** [June 9, 2018, 6:26am UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/6 "2018-06-09T06:26:48Z")
Sounds like you are looking for local facts [https://docs.ansible.com/ansible/latest/user\_guide/playbooks\_variables.html#local-facts-facts-d](https://docs.ansible.com/ansible/latest/user_guide/playbooks_variables.html#local-facts-facts-d) ---
**Author:** ![cava\_cavamagie](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@cava\_cavamagie](https://forum.ansible.com/u/cava_cavamagie)\ **Post date:** [July 6, 2018, 2:46pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/7 "2018-07-06T14:46:30Z")
thank you usin a file stat? ---
**Author:** ![Kai\_Stian\_Olstad](https://avatars.discourse-cdn.com/v4/letter/k/e19adc/32.png) [@Kai\_Stian\_Olstad](https://forum.ansible.com/u/Kai_Stian_Olstad)\ **Post date:** [July 6, 2018, 7:34pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/8 "2018-07-06T19:34:12Z")
I don't understand you question. You seed that you needed to store fact between runs, so if that means between different or the same playbook run the most logic way to do that is with custom facts. It you read the link you see that custom facts is a json, ini or a executable returning json that set the variables/facts you need. ---
**Author:** ![cava\_cavamagie](https://avatars.discourse-cdn.com/v4/letter/c/e68b1a/32.png) [@cava\_cavamagie](https://forum.ansible.com/u/cava_cavamagie)\ **Post date:** [July 6, 2018, 7:53pm UTC](https://forum.ansible.com/t/run-task-only-if-changed/27720/9 "2018-07-06T19:53:28Z")
Yes Yes your solution is the corretto way to achieve my objective Thnak you