Removing decommissionned nodes from Monitoring?

Elastic Stack Elasticsearch
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I have a few Logstash instances running, and I decommissioned one a few days ago. It will never go back online as I don't need it anymore.

But it still appears in Monitoring in Kibana via XPack. How can I remove it from Monitoring altogether?

Using 6.2.3

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Once the time interval you are looking at in Kibana no longer contains data from the removed Logstash instance, it will no longer show up.

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You can simply delete the data from the monitoring indices. This can be done easily using _delete_by_query in the Dev Tools Console.

I would recommend performing a query first, and when you are happy it is returning the data you want to delete, use that query with _delete_by_query

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