Lambda: EKS Event CloudWatch

A Lambda for forwarding CloudWatch Alarms to EKS Events.

flowchart LR
   CloudWatch --> Lambda
   Lambda --> EKS
   EKS --> Kubectl

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Requirements

AWS IAM Permissions

{
    "Statement": [
        {
            "Action": "cloudwatch:ListTagsForResource",
            "Effect": "Allow",
            "Resource": "*"
        },
        {
            "Action": "eks:DescribeCluster",
            "Effect": "Allow",
            "Resource": "arn:aws:eks:REGION:ACCOUNT_ID:cluster/CLUSTER_NAME"
        }
    ],
    "Version": "2012-10-17"
}

Kubernetes RBAC

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: NAME
rules:
- apiGroups:
  - ""
  resources:
  - events
  verbs:
  - create

CloudWatch Alarm Tags

• skpr.io/k8s-event-api-version
• skpr.io/k8s-event-kind
• skpr.io/k8s-event-cluster
• skpr.io/k8s-event-namespace
• skpr.io/k8s-event-name

Sample Lambda Event

{
	"alarmArn": "arn:aws:cloudwatch:ap-southeast-2:ACCOUNT_ID:alarm:CLOUDWATCH_ALARM_NAME",
	"alarmData": {
		"alarmName": "CLOUDWATCH_ALARM_NAME",
		"state": {
			"reason": "FAILING"
		},
		"configuration": {
			"description": "This is a test"
		}
	}
}