This page describes the node operating system (node OS) image that runs on GKE on-prem cluster nodes.
GKE on-prem cluster nodes run Ubuntu version 18.04 (bionic). The image is very similar to Google Kubernetes Engine's Ubuntu node image.
New GKE on-prem versions sometimes introduce a new Kubernetes version for clusters. Version changes are announced in Release notes](/anthos/gke/docs/on-prem/1.5/release-notes). To learn which Kubernetes version your cluster runs, see Versioning and upgrades.
- GKE on-prem's node OS has the following tools preinstalled:
- GKE on-prem's node OS has the
debug-toolboxcontainer image preinstalled.
debug-toolboxincludes several packages for debugging node issues. You run an accompanying shell script,
toolbox, to unpack and run the
debug-toolboxcontainer. Learn about the
As of GKE on-prem version 1.1.0-gke.6, the node OS' default networking configuration is disabled to support static IP allocation.
See node security.