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chore(kb/eks): handle nodes termination gracefully

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Michele Cereda
2025-06-08 18:09:05 +02:00
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commit bc7e2d85e0
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knowledge base/cloud computing/aws/eks.md
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@@ -20,6 +20,7 @@
1. [EBS CSI driver](#ebs-csi-driver)
1. [EBS CSI driver as aws-managed add-on](#ebs-csi-driver-as-aws-managed-add-on)
1. [EBS CSI driver as self-managed add-on](#ebs-csi-driver-as-self-managed-add-on)
1. [Handle EC2 worker nodes' shutdown gracefully](#handle-ec2-worker-nodes-shutdown-gracefully)
1. [Troubleshooting](#troubleshooting)
1. [Identify common issues](#identify-common-issues)
1. [The worker nodes fail to join the cluster](#the-worker-nodes-fail-to-join-the-cluster)
@@ -1316,6 +1317,19 @@ helm upgrade -i --repo 'https://kubernetes-sigs.github.io/aws-ebs-csi-driver' \
</details>
## Handle EC2 worker nodes' shutdown gracefully
AWS has a number of events that can cause EC2 instances to become unavailable, such as EC2 maintenance events, EC2 Spot
interruptions, ASG Scale-In, ASG AZ Rebalance, and EC2 Instance Termination via the API or Console.
Those events are usually announced in some way (I.E., a spot instance's metadata server, or an SQS queue) and can be
monitored in order to respond appropriately and with grace to them.
EKS managed node groups are already configured to react to such events.
When not using managed node groups, one can install the [AWS Node Termination Handler] helm chart in the cluster.<br/>
It will monitor for such events and react automatically.
## Troubleshooting
See [Amazon EKS troubleshooting].
@@ -1459,6 +1473,7 @@ helm upgrade -i --repo 'https://aws.github.io/eks-charts' \
[aws eks create-cluster]: https://docs.aws.amazon.com/cli/latest/reference/eks/create-cluster.html
[aws eks create-fargate-profile]: https://docs.aws.amazon.com/cli/latest/reference/eks/create-fargate-profile.html
[aws eks create-nodegroup]: https://docs.aws.amazon.com/cli/latest/reference/eks/create-nodegroup.html
[AWS Node Termination Handler]: https://github.com/aws/aws-node-termination-handler
[awssupport-troubleshooteksworkernode runbook]: https://docs.aws.amazon.com/systems-manager-automation-runbooks/latest/userguide/automation-awssupport-troubleshooteksworkernode.html
[choosing an amazon ec2 instance type]: https://docs.aws.amazon.com/eks/latest/userguide/choosing-instance-type.html
[configure instance permissions required for systems manager]: https://docs.aws.amazon.com/systems-manager/latest/userguide/setup-instance-profile.html#instance-profile-policies-overview