Build: (1e0049f) Add alert CDIMultipleDefaultVirtStorageClasses

Signed-off-by: Alex Kalenyuk <[email protected]>

runbooks/CDIMultipleDefaultVirtStorageClasses.md

@@ -0,0 +1,32 @@
+# CDIMultipleDefaultVirtStorageClasses
+<!-- Edited by akalenyu, 10 Oct 2023 -->
+
+## Meaning
+
+This alert fires when more than one default virtualization storage class exists.
+
+A default virtualization storage class has precedence over a default Kubernetes storage class for creating a VirtualMachine disk image.
+
+## Impact
+
+If more than one default virtualization storage class exists, a data volume that requests a default storage class (storage class not explicitly specified), receives the most recently created one.
+
+## Diagnosis
+
+Obtain a list of default virtualization storage classes by running the following command:
+
+```bash
+$ kubectl get sc -o json | jq '.items[].metadata|select(.annotations."storageclass.kubevirt.io/is-default-virt-class"=="true")|.name'
+```
+
+## Mitigation
+
+Ensure that only one storage class has the default virtualization storage class annotation.
+
+<!--DS: If you cannot resolve the issue, log in to the link:https://access.redhat.com[Customer Portal] and open a support case, attaching the artifacts gathered during the Diagnosis procedure.-->
+<!--USstart-->
+If you cannot resolve the issue, see the following resources:
+
+- [OKD Help](https://www.okd.io/help/)
+- [#virtualization Slack channel](https://kubernetes.slack.com/channels/virtualization)
+<!--USend-->

runbooks_index.md

@@ -34,6 +34,7 @@
 - [LowVirtAPICount.md](runbooks/LowVirtAPICount.md)
 - [LowVirtOperatorCount.md](runbooks/LowVirtOperatorCount.md)
 - [CDIOperatorDown.md](runbooks/CDIOperatorDown.md)
+- [CDIMultipleDefaultVirtStorageClasses.md](runbooks/CDIMultipleDefaultVirtStorageClasses.md)
 - [LowReadyVirtControllersCount.md](runbooks/LowReadyVirtControllersCount.md)
 - [SingleStackIPv6Unsupported.md](runbooks/SingleStackIPv6Unsupported.md)
 - [SSPDown.md](runbooks/SSPDown.md)