[AWS EKS] set Autoscaler

Deploy the autoscaler

step1

kubectl apply -f https://raw.githubusercontent.com/kubernetes/autoscaler/master/cluster-autoscaler/cloudprovider/aws/examples/cluster-autoscaler-autodiscover.yaml

step2

kubectl -n kube-system annotate deployment.apps/cluster-autoscaler cluster-autoscaler.kubernetes.io/safe-to-evict="false"

step3

set your EKS cluster name at the end of property - --node-group-auto-discovery=asg:tag=k8s.io/cluster-autoscaler/enabled,k8s.io/cluster-autoscaler/<<EKS cluster name>>

set the image version at property image: asia.gcr.io/k8s-artifacts-prod/autoscaling/cluster-autoscaler:v1.18.1

see logs

kubectl -n kube-system logs deployment.apps/cluster-autoscaler

IAM-Policy for worker-nodes Auto scaling

IAM -> policies -> Create policy

	{
	"Version": "2012-10-17",
	"Statement": [
	{
	"Action": [
	"autoscaling:DescribeAutoScalingGroups",
	"autoscaling:DescribeAutoScalingInstances",
	"autoscaling:DescribeLaunchConfigurations",
	"autoscaling:DescribeTags",
	"autoscaling:SetDesiredCapacity",
	"autoscaling:TerminateInstanceInAutoScalingGroup",
	"ec2:DescribeLaunchTemplateVersions"
	],
	"Resource": "*",
	"Effect": "Allow"
	}
	]
	}

view raw auto-scaler-iam-role.json hosted with ❤ by GitHub

attach policy in role of worker node for auto scaling