=?UTF-8?Q?[all][infra][qa]_Retiring_Logstash, _Elasticsearch, _subunit2sql?= , and Health

Clark Boylan cboylan at sapwetik.org
Mon May 10 17:34:40 UTC 2021

Hello everyone,

Xenial has recently reached the end of its life. Our logstash+kibana+elasticsearch and subunit2sql+health data crunching services all run on Xenial. Even without the distro platform EOL concerns these services are growing old and haven't received the care they need to keep running reliably.

Additionally these services represent a large portion of our resource consumption:

* 6 x 16 vcpu + 60GB RAM + 1TB disk Elasticsearch servers
* 20 x 4 vcpu + 4GB RAM logstash-worker servers
* 1 x 2 vcpu + 2GB RAM logstash/kibana central server
* 2 x 8 vcpu + 8GB RAM subunit-worker servers
* 64GB RAM + 500GB disk subunit2sql trove db server
* 1 x 4 vcpu + 4GB RAM health server

To put things in perspective, they account for more than a quarter of our control plane servers, occupying over a third of our block storage and in excess of half the total memory footprint.

The OpenDev/OpenStack Infra team(s) don't seem to have the time available currently to do the major lifting required to bring these services up to date. I would like to propose that we simply turn them off. All of these services operate off of public data that will not be going away (specifically job log content). If others are interested in taking this on they can hook into this data and run their own processing pipelines.

I am sure not everyone will be happy with this proposal. I get it. I came up with the idea for the elasticsearch job log processing way back at the San Diego summit. I spent many many many hours since working to get it up and running and to keep it running. But pragmatism means that my efforts and the team's efforts are better spent elsewhere.

I am happy to hear feedback on this. Thank you for your time.


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