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Kubernetes service limitations

Gardener

Kubernetes version

The latest Kubernetes version you can install in Cleura Cloud with Gardener is 1.31.

IP version

In Cleura Cloud, you can use Gardener to deploy Kubernetes clusters that use IPv4. IPv6 clusters or services (whether single-stack or dual-stack) are not supported.

Service annotations

In Gardener-managed clusters, we do not support loadbalancer.openstack.org annotations for Kubernetes services of the LoadBalancer type.

Persistent volumes (PVs)

In Gardener-managed Kubernetes clusters, the supported PV access modes are ReadWriteOnce (RWO), and ReadWriteOncePod (RWOP). Note that RWO enables multiple Pods to access the same volume, as long as they are configured to run on the same node. Use RWOP to restrict the volume to one pod only.

You cannot use ReadWriteMany (RWX) or ReadOnlyMany (ROX) PVs.

Dynamic volume provisioning storage classes

In Cleura Cloud, Gardener-managed clusters contain a single storage class named default, which is the supported storage class you should use for all dynamically-provisioned persistent volumes. We do not provide support for any user-defined storage classes.