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Managing Kubernetes clusters

Self-service users can deploy ready-to-use Kubernetes clusters with persistent storage for managing containerized applications.

A Kubernetes cluster includes the following components:

  • Underlying OS: Fedora 41 CoreOS

  • Container runtime: containerd 1.6.23

  • Network plugin:

  • Kubernetes versions 1.28–1.29:

  • Flannel VXLAN (for public VM networks)

  • Flannel host-gw (for private VM networks)

  • Kubernetes versions 1.30–1.31: Cilium

Limitations

  • Kubernetes versions 1.15.x–1.27.x are no longer supported. Kubernetes clusters created with these versions are marked with the Deprecated tag.

  • Kubernetes cluster certificates are issued for five years. To renew the certificates, use the openstack coe ca rotate command, as described in the OpenStack documentation.

  • Starting with version 1.31.x, Envoy proxy can be installed automatically with Cilium if SELinux is disabled on Kubernetes nodes.

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