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Define Container Runtime

For AL2 ( AmazonLinux2 ) AMIs it's possible to set container runtime to containerd.

Un-managed Nodes

For un-managed nodes, simply provide the following configuration when creating a new node:

apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: container-runtime-test
  region: us-west-2

nodeGroups:
  - name: ng-1
    instanceType: m5.xlarge
    desiredCapacity: 2
    amiFamily: AmazonLinux2
    containerRuntime: containerd

This value is set to dockerd by default to preserve backwards compatibility, but will soon be deprecated.

Note that there is no equivalent flag for setting the container runtime, this can only be done via a config file.

At the time of this writing the following container runtime values are allowed:

  • containerd
  • dockerd

Managed Nodes

For managed nodes we don't explicitly provide a bootstrap script, and thus it's up to the user to define a different runtime if they wish, using overrideBootstrapCommand:

managedNodeGroups:
  - name: m-ng-1
    instanceType: m5.large
    overrideBootstrapCommand: |
      #!/bin/bash
      /etc/eks/bootstrap.sh <cluster-name> <other flags> --container-runtime containerd