Node image

This page describes the node operating system (node OS) image that runs on Google Distributed Cloud cluster nodes.

Google Distributed Cloud cluster nodes run ubuntu_containerd by default. The image is similar to Google Kubernetes Engine's Ubuntu node image.

Google Distributed Cloud node pools also support Container-Optimized OS. Container-Optimized OS on Google Distributed Cloud supports kdump for debugging kernel issues.

Google Distributed Cloud offers the following node image options per OS for your cluster:

OS Node images Status
Container-Optimized OS
  • cos
 General Availability
Ubuntu
  • ubuntu_containerd
 General Availability

Kubernetes version

New Google Distributed Cloud versions sometimes introduce a new Kubernetes version for clusters. Version changes are announced in Release notes. To learn which Kubernetes version your cluster runs, see Versions.

Preinstalled tools

  • Google Distributed Cloud's node OS has the following tools preinstalled: arping cloud-utils, conntrack, logrotate, prips, systemd-container
  • Google Distributed Cloud's node OS has the debug-toolbox container image preinstalled. debug-toolbox includes several packages for debugging node issues. You run an accompanying shell script, toolbox, to unpack and run the debug-toolbox container. Learn about the toolbox script.

Networking

As of Google Distributed Cloud version 1.1.0-gke.6, the node OS' default networking configuration is disabled to support static IP allocation.

Security

See node security.