Observability

1. Verify the Cert-Manager is deployed and configured on the OpenShift Cluster. Please review the Red Hat documentation for the procedure.

2. Verify the user workload monitoring is enabled and configured on the OpenShift Cluster. Please review Red Hat documentation for the procedure to configure user workload monitoring on the OpenShift Cluster.

3. Enable Observability module in the CSM

   Use this command to create the ContainerStorageModule custom resource with Observability enabled.

   oc create -f csm-vxflexos.yaml
   

   Example:

   cat <<EOF> csm-vxflexos.yaml
   apiVersion: storage.dell.com/v1
   kind: ContainerStorageModule
   metadata:
     name: vxflexos
     namespace: vxflexos
   spec:
     driver:
       csiDriverType: "powerflex"
       configVersion: v2.16.0
     module:
     - name: observability
       enabled: true
       components:
       - name: otel-collector
         enabled: true
       - name: metrics-powerflex
         enabled: true
   EOF
   

   Verify the Observability Pods are created.

   oc get pod -n vxflexos
   
   NAME                                         READY   STATUS    RESTARTS   AGE
   karavi-metrics-powerflex-69855dbdd5-5mshq     1/1     Running   0          2m54s
   otel-collector-b496d8c4d-gp6zz               2/2     Running   0          2m55s 
   

   Verify the Observability Services.

   oc get svc -n vxflexos
   NAME                           TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)              AGE
   karavi-metrics-powerflex        ClusterIP   172.30.169.86    <none>        2222/TCP             3m29s
   otel-collector                 ClusterIP   172.30.127.237   <none>        55680/TCP,8443/TCP   3m29s 
   

4. Create Service Monitor to scrape the Observability module by the OpenShift Observability.

   Use this command to create the ServiceMonitor.

   oc apply -f smon-otel-collector.yaml
   

   Example:

   cat <<EOF> smon-otel-collector.yaml
   apiVersion: monitoring.coreos.com/v1
   kind: ServiceMonitor
   metadata:
     name: otel-collector
     namespace: vxflexos
   spec:
     endpoints:
     - path: /metrics
       port: exporter-https
       scheme: https
       tlsConfig:
         insecureSkipVerify: true
     selector:
       matchLabels:
         app.kubernetes.io/instance: karavi-observability
         app.kubernetes.io/name: otel-collector 
   EOF
   

   Verify the ServiceMonitor is created.

   oc get smon -n vxflexos
   NAME             AGE
   otel-collector   44h 
   

5. Verify the PowerFlex metrics are visible in the OpenShift Console.

   On the OpenShift Console, navigate to Observer and then Metrics, search for PowerFlex metrics.

Installing OpenShift Virtualization and Accessing KubeVirt Metrics

User can follow the official guide to install Openshift Virtualization in OCP cluster. Once installed, OpenShift Virtualization automatically creates the ServiceMonitor required by Prometheus to scrape KubeVirt metrics.

On the OpenShift Console, navigate to Observer and then Metrics, search for kubevirt metrics. User can use PromQL join queries to correlate KubeVirt metrics with Dell CSI storage metrics for advanced insights. For example, for each VM disk, find its allocated size of the underlying PowerFlex volume, using the following query:

label_replace(kubevirt_vm_disk_allocated_size_bytes, "Namespace", "$1", "namespace", "(.*)") * on(persistentvolumeclaim, Namespace) group_left(PersistentVolumeName) label_replace(powerflex_volume_read_bw_megabytes_per_second, "persistentvolumeclaim", "$1", "PersistentVolumeClaimName", "(.*)")