There are user defined strings in OpenStackControlPlane CR that later used as CR names or other k8s resource name (e.g. statefulset) but these strings are not validated by the openstack-operator even though k8s resource names has both length and character set restrictions.

Example failures:

1. length:
   • add a memcached instance named "memcached-foo-bar-baz-gaz-1234567890-1234567890-1234567890"
   • it will be accepted but the corresponding statefulset never reaches readiness.
2. charset:
   • add a memcached instance named "memcached_foo"
   • it will be accepted but openstack-operator cannot create the related Memcached CR due to

      
     2024-06-27T11:43:11.227Z	ERROR	Reconciler error	{"controller": "openstackcontrolplane", "controllerGroup": "core.openstack.org", "controllerKind": "OpenStackControlPlane", "OpenStackControlPlane": {"name":"openstack-galera-network-isolation","namespace":"openstack"}, "namespace": "openstack", "name": "openstack-galera-network-isolation", "reconcileID": "438f99a1-399a-486d-a2eb-30d1629290f6", "error": "memcached_foo(Certificate.cert-manager.io \"memcached_foo-svc\" is invalid: metadata.name: Invalid value: \"memcached_foo-svc\": a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*'))"}
     sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler
     	/opt/app-root/src/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.6/pkg/internal/controller/controller.go:329
     sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem
     	/opt/app-root/src/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.6/pkg/internal/controller/controller.go:266
     sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
     	/opt/app-root/src/go/pkg/mod/sigs.k8s.io/controller-runtime@v0.16.6/pkg/internal/controller/controller.go:227
     
     

This is probably not limited to the memchached handling but applies to other user defined string in OpenStackControlPlane used as resource names later e.g.:

• spec.rabbitmq.templates.<name>
• spec.galera.tempates.<name>
• spec.glance.template.glanceAPIs.<name>