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Amazon EKS add-ons

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Amazon EKS add-ons - Amazon EKS
ConsiderationsConsiderations for Amazon EKS Auto ModeSupport

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An add-on is software that provides supporting operational capabilities to Kubernetes applications, but is not specific to the application. This includes software like observability agents or Kubernetes drivers that allow the cluster to interact with underlying AWS resources for networking, compute, and storage. Add-on software is typically built and maintained by the Kubernetes community, cloud providers like AWS, or third-party vendors. Amazon EKS automatically installs self-managed add-ons such as the Amazon VPC CNI plugin for Kubernetes, kube-proxy, and CoreDNS for every cluster. Note that the VPC CNI add-on isn’t compatible with Amazon EKS Hybrid Nodes and doesn’t deploy to hybrid nodes. You can change the default configuration of the add-ons and update them when desired.

Amazon EKS add-ons provide installation and management of a curated set of add-ons for Amazon EKS clusters. All Amazon EKS add-ons include the latest security patches, bug fixes, and are validated by AWS to work with Amazon EKS. Amazon EKS add-ons allow you to consistently ensure that your Amazon EKS clusters are secure and stable and reduce the amount of work that you need to do in order to install, configure, and update add-ons. If a self-managed add-on, such as kube-proxy is already running on your cluster and is available as an Amazon EKS add-on, then you can install the kube-proxy Amazon EKS add-on to start benefiting from the capabilities of Amazon EKS add-ons.

You can update specific Amazon EKS managed configuration fields for Amazon EKS add-ons through the Amazon EKS API. You can also modify configuration fields not managed by Amazon EKS directly within the Kubernetes cluster once the add-on starts. This includes defining specific configuration fields for an add-on where applicable. These changes are not overridden by Amazon EKS once they are made. This is made possible using the Kubernetes server-side apply feature. For more information, see Determine fields you can customize for Amazon EKS add-ons.

You can use Amazon EKS add-ons with any Amazon EKS node type. For more information, see Manage compute resources by using nodes.

You can add, update, or delete Amazon EKS add-ons using the Amazon EKS API, AWS Management Console, AWS CLI, and eksctl. You can also create Amazon EKS add-ons using AWS CloudFormation.

Considerations

Consider the following when you use Amazon EKS add-ons:

  • To configure add-ons for the cluster your IAM principal must have IAM permissions to work with add-ons. For more information, see the actions with Addon in their name in Actions defined by Amazon Elastic Kubernetes Service.

  • Amazon EKS add-ons run on the nodes that you provision or configure for your cluster. Node types include Amazon EC2 instances, Fargate, and hybrid nodes.

  • You can modify fields that aren’t managed by Amazon EKS to customize the installation of an Amazon EKS add-on. For more information, see Determine fields you can customize for Amazon EKS add-ons.

  • If you create a cluster with the AWS Management Console, the Amazon EKS kube-proxy, Amazon VPC CNI plugin for Kubernetes, and CoreDNS Amazon EKS add-ons are automatically added to your cluster. If you use eksctl to create your cluster with a config file, eksctl can also create the cluster with Amazon EKS add-ons. If you create your cluster using eksctl without a config file or with any other tool, the self-managed kube-proxy, Amazon VPC CNI plugin for Kubernetes, and CoreDNS add-ons are installed, rather than the Amazon EKS add-ons. You can either manage them yourself or add the Amazon EKS add-ons manually after cluster creation. Regardless of the method that you use to create your cluster, the VPC CNI add-on doesn’t install on hybrid nodes.

  • The eks:addon-cluster-admin ClusterRoleBinding binds the cluster-admin ClusterRole to the eks:addon-manager Kubernetes identity. The role has the necessary permissions for the eks:addon-manager identity to create Kubernetes namespaces and install add-ons into namespaces. If the eks:addon-cluster-admin ClusterRoleBinding is removed, the Amazon EKS cluster will continue to function, however Amazon EKS is no longer able to manage any add-ons. All clusters starting with the following platform versions use the new ClusterRoleBinding.

  • A subset of EKS add-ons from AWS have been validated for compatibility with Amazon EKS Hybrid Nodes. For more information, see the compatibility table on AWS Add-ons.

Required platform version

Review the table to determine the minimum required platform version to use this feature with your cluster. You can use the listed platform version, or a more recent platform version. For example, if the table lists "eks.14" you can use platform version "eks.15". For more information, see View Amazon EKS platform versions for each Kubernetes version.

Kubernetes version EKS platform version

1.25 or newer

All platform versions

1.20

eks.12

1.21

eks.14

1.22

eks.9

1.23

eks.5

1.24

eks.3

Considerations for Amazon EKS Auto Mode

Amazon EKS Auto mode includes capabilities that deliver essential cluster functionality, including:

  • Pod networking

  • Service networking

  • Cluster DNS

  • Autoscaling

  • Block storage

  • Load balancer controller

  • Pod Identity agent

  • Node monitoring agent

With Auto mode compute, many commonly used EKS add-ons become redundant, such as:

  • Amazon VPC CNI

  • kube-proxy

  • CoreDNS

  • Amazon EBS CSI Driver

  • EKS Pod Identity Agent

However, if your cluster combines Auto mode with other compute options like self-managed EC2 instances, Managed Node Groups, or AWS Fargate, these add-ons remain necessary. AWS has enhanced EKS add-ons with anti-affinity rules that automatically ensure add-on pods are scheduled only on supported compute types. Furthermore, users can now leverage the EKS add-ons DescribeAddonVersions API to verify the supported computeTypes for each add-on and its specific versions. Additionally, with EKS Auto mode, the controllers listed above run on AWS owned infrastructure. So, you many not even see them in your accounts unless you are using EKS auto mode with other types of compute in which case, you will see the controllers you installed on your cluster.

If you are planning to enable EKS Auto Mode on an existing cluster, you may need to upgrade the version of certain addons. For more information, see Required Add-on Versions for EKS Auto Mode.

Support

AWS publishes multiple types of add-ons with different levels of support.

  • AWS Add-ons: These add-ons are built and fully supported by AWS.

    • Use an AWS add-on to work with other AWS services, such as Amazon EFS.

    • For more information, see AWS Add-ons.

  • AWS Marketplace Add-ons: These add-ons are scanned by AWS and supported by an independent AWS partner.

    • Use a marketplace add-on to add valuable and sophisticated features to your cluster, such as monitoring with Splunk.

    • For more information, see AWS Marketplace add-ons.

  • Community Add-ons: These add-ons are scanned by AWS but supported by the open source community.

    • Use a community add-on to reduce the complexity of installing common open source software, such as Kubernetes Metrics Server.

    • Community add-ons are built by AWS. AWS only validates community add-ons for version compatibility.

    • For more information, see Community add-ons.

The following table details the scope of support for each add-on type:

Category Feature AWS add-ons AWS Marketplace add-ons Community add-ons

Development

Built by AWS

Yes

No

Yes

Development

Validated by AWS

Yes

No

Yes*

Development

Validated by AWS Partner

No

Yes

No

Maintenance

Scanned by AWS

Yes

Yes

Yes

Maintenance

Patched by AWS

Yes

No

Yes

Maintenance

Patched by AWS Partner

No

Yes

No

Distribution

Published by AWS

Yes

No

Yes

Distribution

Published by AWS Partner

No

Yes

No

Support

Basic Install Support by AWS

Yes

Yes

Yes

Support

Full AWS Support

Yes

No

No

Support

Full AWS Partner Support

No

Yes

No

*: Validation for community add-ons only includes Kubernetes version compatibility. For example, if you install a community add-on on a cluster, AWS checks if it is compatible with the Kubernetes version of your cluster.

AWS Marketplace add-ons can download additional software dependencies from external sources outside of AWS. These external dependencies are not scanned or validated by AWS. Consider your security requirements when deploying AWS Marketplace add-ons that fetch external dependencies.

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