{{tag>aws cloud troubleshooting}}

====== aws troubleshooting ======
===== Instances failed to join the kubernetes cluster =====

Usually caused by the worker nodes not being able to contact the API server on the control plane.
Things to check:

  - Check the "Cluster security group" and "Additional security groups" in the EKS cluster. They need to allow traffic to the 443 and 1025-65535 ports
  - The EC2 instance (the worker nodes) need to have an IAM role with following permission policies //AmazonEKSWorkerNodePolicy//, //AmazonEC2ContainerRegistryReadOnly//, //AmazonEKS_CNI_Policy//


====== Tested on ======
  * 

====== See also ======
  * [[wiki:aws_cli_commands|aws cli commands]]
====== References ======