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Add NPD+CA autohealing use case to user guide

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Dharma Bellamkonda
2020-07-24 10:55:20 -06:00
parent 8d60370612
commit 30b2bd5d9f
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docs/user-guide.md
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@@ -88,3 +88,12 @@ strategies:
params:
maxPodLifeTimeSeconds: 604800 # pods run for a maximum of 7 days
```
### Autoheal Node Problems
Descheduler's `RemovePodsViolatingNodeTaints` strategy can be combined with
[Node Problem Detector](https://github.com/kubernetes/node-problem-detector/) and
[Cluster Autoscaler](https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler) to automatically remove
Nodes which have problems. Node Problem Detector can detect specific Node problems and taint any Nodes which have those
problems. The Descheduler will then deschedule workloads from those Nodes. Finally, if the descheduled Node's resource
allocation falls below the Cluster Autoscaler's scale down threshold, the Node will become a scale down candidate
and can be removed by Cluster Autoscaler. These three components form an autohealing cycle for Node problems.