Configuring persistent storage

When you configure persistent storage, your metrics are saved on a persistent volume (PV) and are not deleted when a pod is restarted or re-created.

Before you begin

  • Read the documentation for OpenShift® Container Platform Prometheus persistent storage.
  • Read the product documentation on the Prometheus website to learn about the recommended practices for configuring persistent storage.

About this task

Use the following procedure to configure storage.
Important:
  • Replace <storage_class> with your storage class.
  • user-workload-monitoring-config is the retention period for user data on Prometheus storage.
  • For user-defined projects, you must configure the retention period of metrics to be at least 15 days.

Procedure

  1. Add your PVC configuration.
    1. Edit the ibm-guardium-insights/inventory/prometheusSetup/files/prometheus.yaml file.
      Example output:
      apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-monitoring-config
  namespace: openshift-monitoring
data:
  config.yaml: |
    enableUserWorkload: true
    prometheusK8s:
      externalLabels:
        cluster_name: gi
      volumeClaimTemplate:
        spec:
          storageClassName: <storage_class>
          resources:
            requests:
              storage: 50Gi
    alertmanagerMain:
      volumeClaimTemplate:
        spec:
          storageClassName: <storage_class>
          resources:
            requests:
              storage: 20Gi
  2. Edit the cluster-monitoring-config configmap.
    Example output:
    apiVersion: v1
kind: ConfigMap
metadata:
  name: user-workload-monitoring-config
  namespace: openshift-user-workload-monitoring
data:
  config.yaml: |
    prometheus:
      retention: 15d
      externalLabels:
        cluster_name: gi
      volumeClaimTemplate:
        spec:
          storageClassName: <storage_class>
          resources:
            requests:
              storage: 50Gi
    thanosRuler:
      volumeClaimTemplate:
        spec:
          storageClassName: <storage_class>
          resources:
            requests:
              storage: 20Gi
  3. Apply the changes. 
    oc apply -f ibm-guardium-insights/inventory/prometheusSetup/files/prometheus.yaml