Enable Cluster Autoscaler in an EKS Kubernetes Cluster

Step 1: Create EKS Additional IAM policy. The Cluster Autoscaler requires the following IAM permissions to make calls to AWS APIs on your behalf. ...
Step 2: Attach policy to EKS Node group. ...
Step 3: Add Node group tags. ...
Step 4: Deploy the Cluster Autoscaler in EKS. ...
Step 5: Testing EKS Cluster Autoscaler.

What is EKS cluster Autoscaler?
How do I update my cluster Autoscaler?
Can EKS cluster span regions?
How do you upgrade an EKS cluster?
How does cluster Autoscaler work?
Does fargate support EKS?
How do I know if Autoscaling is enabled?
How do you scale up an AKS cluster?
What does master node in a Kubernetes cluster do?
What is EKS and Kubernetes?
What are the regions in AWS?
How many EKS clusters are there?

What is EKS cluster Autoscaler?

Cluster Autoscaler can scale node groups to and from zero, which can yield significant cost savings. It detects the CPU, memory, and GPU resources of an Auto Scaling group by inspecting the InstanceType that is specified in its LaunchConfiguration or LaunchTemplate .

How do I update my cluster Autoscaler?

Update an existing AKS cluster to enable the cluster autoscaler. Use the az aks update command to enable and configure the cluster autoscaler on the node pool for the existing cluster. Use the --enable-cluster-autoscaler parameter, and specify a node --min-count and --max-count .

Can EKS cluster span regions?

You can connect applications hosted in Amazon EKS clusters in multiple AWS Regions over private network using inter-region VPC peering and employ a data replication strategy using AWS Database and Storage services that fit your recovery point (RPO) and recovery time (RTO) objectives.

How do you upgrade an EKS cluster?

To update the EKS worker node , new Auto-scaling Group(ASG) with v1. 15 of worker nodes needs to be created with a lifecycle=1.15 label. After creating a new worker node, we need to apply Pod Disruption Budget (PDB) to all our applications which will help 100 percent availability of our pod in case any disruption.

How does cluster Autoscaler work?

The cluster autoscaler is a Kubernetes tool that increases or decreases the size of a Kubernetes cluster (by adding or removing nodes), based on the presence of pending pods and node utilization metrics. Adds nodes to a cluster whenever it detects pending pods that could not be scheduled due to resource shortages.

Does fargate support EKS?

Amazon EKS integrates Kubernetes with AWS Fargate by using controllers that are built by AWS using the upstream, extensible model provided by Kubernetes. These controllers run as part of the Amazon EKS managed Kubernetes control plane and are responsible for scheduling native Kubernetes pods onto Fargate.

How do I know if Autoscaling is enabled?

Click the Nodes tab. Under Node Pools, click the name of the node pool you want to modify, then click edit Edit. Under Size, select the Enable autoscaling checkbox. Change the values of the Minimum number of nodes and Maximum number of nodes fields as desired.

How do you scale up an AKS cluster?

To scale a user pool to 0, you can use the az aks nodepool scale in alternative to the above az aks scale command, and set 0 as your node count.

What does master node in a Kubernetes cluster do?

A master node is a node which controls and manages a set of worker nodes (workloads runtime) and resembles a cluster in Kubernetes. ... It also holds the nodes resources plan to determine the proper action for the triggered event. For example the scheduler would figure out which worker node will host a newly scheduled POD.

What is EKS and Kubernetes?

Amazon Elastic Kubernetes Service (Amazon EKS) is a managed service that you can use to run Kubernetes on AWS without needing to install, operate, and maintain your own Kubernetes control plane or nodes. ... Runs and scales the Kubernetes control plane across multiple AWS Availability Zones to ensure high availability.

What are the regions in AWS?

Regions and Availability Zones

North America.
South America.
Europe/Middle East/Africa.
Asia Pacific.

How many EKS clusters are there?

Amazon EKS service quotas

Service quota	Description	Default quota value
Clusters	The maximum number of EKS clusters in this account in the current Region.	100
Control plane security groups per cluster	The maximum number of control plane security groups per cluster (these are specified when you create the cluster).	4