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node-configuration-daemonset

This project shows how you can install the SSM agent onto EKS worker nodes using a Kubernetes DaemonSet. This method for configuring the nodes can be used to customize workers in an EKS Managed Node Group (MNG) after they've been deployed, at least until launch templates are supported. This project was heavily inspired by Shekhar Patnaik's AKS Node Installer Project.

Installation instructions

  1. Add the AmazonSSMManagedInstanceCore policy the the EC2 Instance Profile of the Managed Worker Nodes.
  2. Apply the manifest:
kubectl apply -f setup.yaml

Updates

  • 11/5/2020 The daemonset has been updated. Instead of running indefinitely, the container that runs the scripts to install the SSM agent runs as an init container. Upon exiting a pause container runs. This has a considerably smaller attack surface than the init container.
  • 3/15/2020 Created setup.yaml to install the DaemonSet. The manifest adds a PSP, RBAC Role, and ServiceAccount for the init container.

Verify installation

You can verify that the installation was successful by looking at the logs of a DaemonSet pod. If the installation was successfull, the last line in the log file will read Success otherwise it will read Fail. The nodes will also appears as managed instances in the SSM console if the installation was successful.