Comments (1)
bwagner5
commented on July 17, 2024
I think it would be great if we could reuse https://github.com/aws/aws-node-termination-handler, no need in reinventing the wheel here.
As far as how it would integrate is something up for debate.
- NTH already handles events via EventBridge to SQS, so we could add a karpenter event that causes NTH to drain a node. NTH could even be configured to send a webhook to karpenter when it's complete for the node deletion. This would be the easiest, since all the functionality exists to do this today.
- Functionality could be added to NTH to make it more like a proper k8s controller. Karpenter could then mark nodes as needing to be drained, NTH would see nodes tainted or labeled a certain way (or monitor the Node CRDs), drain them, and then remove the label - something like that... This seems more extensible for other termination handler components to be plugged in later if necessary.
- Karpenter could call NTH directly via some registered http handler... this option doesn't seem great, but could work.
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