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 39 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.