Node image

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

Beta — Preview

This feature is subject to the "Pre-GA Offerings Terms" in the General Service Terms section of the Service Specific Terms. Pre-GA features are available "as is" and might have limited support. For more information, see the launch stage descriptions.

Google Distributed Cloud cluster nodes run Ubuntu version 18.04 (bionic) by default. The image is similar to Google Kubernetes Engine's Ubuntu node image. Container-Optimized OS is also supported in Google Distributed Cloud node pools as a preview feature.

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

OS	Node images	Status
Container-Optimized OS		Preview
Ubuntu	Ubuntu Ubuntu with Docker (ubuntu)	General Availability

Supported and Unsupported Features with Container-Optimized OS

Container-Optimized OS does not support the following feature.

• dataplane v2

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.