Version 1.7. This version is supported as outlined in the Anthos version support policy, offering the latest patches and updates for security vulnerabilities, exposures, and issues impacting Anthos clusters on VMware (GKE on-prem). Refer to the release notes for more details. This is not the most recent version.

Node image

This page describes the node operating system (node OS) image that runs on Anthos clusters on VMware (GKE on-prem) cluster nodes.

Anthos clusters on VMware 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 Anthos clusters on VMware node pools as a preview feature.

Anthos clusters on VMware 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 Anthos clusters on VMware 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

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

Security

See node security.