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Chapter 6. Using managed cluster labels in Grafana

Enable managed cluster labels to use them with Grafana dashboards. When observability is enabled in the hub cluster, the observability-managed-cluster-label-allowlist ConfigMap is created in the open-cluster-management-observability namespace. The ConfigMap contains a list of managed cluster labels maintained by the observabilty-rbac-query-proxy pod, to populate a list of label names to filter from within the ACM - Cluster Overview Grafana dashboard. By default, observability ignores a subset of labels in the observability-managed-cluster-label-allowlist ConfigMap.

When a cluster is imported into the managed cluster fleet or modified, the observability-rbac-query-proxy pod watches for any changes in reference to the managed cluster labels and automatically updates the observability-managed-cluster-label-allowlist ConfigMap to reflect the changes. The ConfigMap contains only unique label names, which are either included in the ignore_labels or labels list. Your observability-managed-cluster-label-allowlist ConfigMap might resemble the following YAML file: 

data:
  managed_cluster.yaml: |
    ignore_labels:
1 

      - clusterID
      - cluster.open-cluster-management.io/clusterset
      - feature.open-cluster-management.io/addon-application-manager
      - feature.open-cluster-management.io/addon-cert-policy-controller
      - feature.open-cluster-management.io/addon-cluster-proxy
      - feature.open-cluster-management.io/addon-config-policy-controller
      - feature.open-cluster-management.io/addon-governance-policy-framework
      - feature.open-cluster-management.io/addon-iam-policy-controller
      - feature.open-cluster-management.io/addon-observability-controller
      - feature.open-cluster-management.io/addon-search-collector
      - feature.open-cluster-management.io/addon-work-manager
      - installer.name
      - installer.namespace
      - local-cluster
      - name
    labels:
2 

      - cloud
      - vendor
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+ <1> Any label that is listed in the ignore_labels keylist of the ConfigMap is removed from the drop-down filter on the ACM - Clusters Overview Grafana dashboard. <2> The labels that are enabled are displayed in the drop-down filter on the ACM - Clusters Overview Grafana dashboard. The values are from the acm_managed_cluster_labels metric, depending on the label key value that is selected.

Continue reading how to use managed cluster labels in Grafana:

6.1. Adding managed cluster labels
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When you add a managed cluster label to the observability-managed-cluster-label-allowlist ConfigMap, the label becomes available as a filter option in Grafana. Add a unique label to the hub cluster, or managed cluster object that is associated with the managed cluster fleet. For example, if you add the label, department=finance to a managed cluster, the ConfigMap is updated and might resemble the following changes: 

data:
  managed_cluster.yaml: |
    ignore_labels:
      - clusterID
      - cluster.open-cluster-management.io/clusterset
      - feature.open-cluster-management.io/addon-application-manager
      - feature.open-cluster-management.io/addon-cert-policy-controller
      - feature.open-cluster-management.io/addon-cluster-proxy
      - feature.open-cluster-management.io/addon-config-policy-controller
      - feature.open-cluster-management.io/addon-governance-policy-framework
      - feature.open-cluster-management.io/addon-iam-policy-controller
      - feature.open-cluster-management.io/addon-observability-controller
      - feature.open-cluster-management.io/addon-search-collector
      - feature.open-cluster-management.io/addon-work-manager
      - installer.name
      - installer.namespace
      - local-cluster
      - name
    labels:
      - cloud
      - department
      - vendor
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6.2. Enabling managed cluster labels
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Enable a managed cluster label that is already disabled by removing the label from the ignore_labels list in the observability-managed-cluster-label-allowlist ConfigMap.

For example, enable the local-cluster and name labels. Your observability-managed-cluster-label-allowlist ConfigMap might resemble the following content: 

data:
  managed_cluster.yaml: |
    ignore_labels:
      - clusterID
      - installer.name
      - installer.namespace
    labels:
      - cloud
      - vendor
      - local-cluster
      - name
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The ConfigMap resyncs after 30 seconds to ensure that the cluster labels are updated. After you update the ConfigMap, check the observability-rbac-query-proxy pod logs in the open-cluster-management-observability namespace to verify where the label is listed. The following information might be displayed in the pod log: 

enabled managedcluster labels: <label>
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From the Grafana dashboard, verify that the label is listed as a value in the Label drop-down menu.

6.3. Disabling managed cluster labels
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Exclude a managed cluster label from being listed in the Label drop-down filter. Add the label name to the ignore_labels list. For example, your YAML might resemble the following file if you add local-cluster and name back into the ignore_labels list: 

data:
  managed_cluster.yaml: |
    ignore_labels:
      - clusterID
      - installer.name
      - installer.namespace
      - local-cluster
      - name
    labels:
      - cloud
      - vendor
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Check the observability-rbac-query-proxy pod logs in the open-cluster-management-observability namespace to verify where the label is listed. The following information might be displayed in the pod log: 

disabled managedcluster label: <label>
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6.4. Additional resources
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