Node image

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

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 for your cluster:

1.16

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

1.28

OS Node images Status
Container-Optimized OS
  • cos
 General Availability
Container-Optimized OS with cgroup v2
  • cos_cgv2
 Preview
Ubuntu with containerd
  • ubuntu_containerd
 General Availability
Ubuntu with containerd and cgroup v2
  • ubuntu_cgv2
 Preview

1.29

OS Node images Status
Container-Optimized OS
  • cos
 General Availability
Container-Optimized OS with cgroup v2
  • cos_cgv2
 General Availability
Ubuntu with containerd
  • ubuntu_containerd
 General Availability
Ubuntu with containerd and cgroup v2
  • ubuntu_cgv2
 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

  • The node OS has the following tools preinstalled: arping cloud-utils, conntrack, logrotate, prips, and systemd-container.
  • The 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 version 1.1.0-gke.6, the node OS default networking configuration is disabled to support static IP allocation.

Security

See node security.