# Watcher alert for cluster nodes memory and disk **URL:** \ **Category:** Kibana\ **Created:** [June 8, 2020, 10:14am UTC](https://discuss.elastic.co/t/watcher-alert-for-cluster-nodes-memory-and-disk/236153 "2020-06-08T10:14:40Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![JG.91](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jg.91/32/69820_2.png) [@JG.91](https://discuss.elastic.co/u/JG.91)\ **Post date:** [June 8, 2020, 10:14am UTC](https://discuss.elastic.co/t/watcher-alert-for-cluster-nodes-memory-and-disk/236153/1 "2020-06-08T10:14:41Z")
Hello friends, I want to know how I Can configure a watcher to alert when Elasticsearch nodes free memory or free disk space goes below a threshold? I mean what input search I should use in watcher JSON? Can you give me a sample? Thank you ---
**Author:** ![Teja](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/teja/32/16324_2.png) [@Teja](https://discuss.elastic.co/u/Teja)\ **Post date:** [June 9, 2020, 5:20am UTC](https://discuss.elastic.co/t/watcher-alert-for-cluster-nodes-memory-and-disk/236153/2 "2020-06-09T05:20:45Z")
yes you can use watcher to call elastic APIs. [https://www.elastic.co/guide/en/elasticsearch/reference/current/input-http.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/input-http.html) Refer topic "Calling Elasticsearch APIs" where you can know about your full cluster stats such as "OS, Mem, Storage etc". Hope this answers your question. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 7, 2020, 5:20am UTC](https://discuss.elastic.co/t/watcher-alert-for-cluster-nodes-memory-and-disk/236153/3 "2020-07-07T05:20:45Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.