Timeouts for streaming connections in an AKS worker node should be enabled

Description

Timeouts on streaming connections should be enabled. Setting idle timeouts ensures that the node is protected against Denial-of-Service attacks, inactive connections, and running out of ephemeral ports.

Remediation

Choose one of the following remediation methods. For both methods, a restart of the Kubelet service is required.

Kubelet config file

  1. Add the following JSON to the /etc/kubernetes/kubelet/kubelet-config.json file.
"streamingConnectionIdleTimeout": "4h0m0s"

Executable arguments

  1. Edit the Kubelet service file on each worker node and ensure the following parameters are part of the KUBELET_ARGS variable string.
--streaming-connection-idle-timeout=4h0m0s