Override ConfigMap to Modify the Storage Retention Period in Workspace Grafana Loki

DKP configures Grafana Loki to retain log metadata and logs for 1 week, using the Compactor. This retention policy can be customized.

The minimum retention period is 24h.

To customize the retention policy using configOverrides, run these commands on the management cluster:

1. Execute the following command to get the namespace of your workspace:

   CODE

   dkp get workspaces

   Copy the value under the NAMESPACE column for your workspace.

2. Set the WORKSPACE_NAMESPACE variable to the namespace copied in the previous step:

   CODE

   export WORKSPACE_NAMESPACE=<WORKSPACE_NAMESPACE>

3. Create a ConfigMap with custom configuration values for Grafana Loki. Since the retention configuration is nested in a config string, you must copy the entire block. The following example sets the retention period to 360 hours (15 days). Refer to Grafana Loki’s Retention Configuration documentation for more information about this field.

   CODE

   cat <<EOF | kubectl apply -f -
   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: grafana-loki-custom-overrides
     namespace: ${WORKSPACE_NAMESPACE}
   data:
     values.yaml: |
       loki:
         structuredConfig:
           limits_config:
             retention_period: 360h
   EOF

4. Edit the grafana-loki AppDeployment to set the value of spec.configOverrides.name to grafana-loki-custom-overrides(Refer to Deploy a service with a custom configuration for more information).

   CODE

   dkp edit appdeployment -n ${WORKSPACE_NAMESPACE} grafana-loki

   After your editing is complete, the AppDeployment resembles this example:

   CODE

   apiVersion: apps.kommander.d2iq.io/v1alpha3
   kind: AppDeployment
   metadata:
     name: grafana-loki
     namespace: ${WORKSPACE_NAMESPACE}
   spec:
     appRef:
       name: grafana-loki-0.48.4
       kind: ClusterApp
     configOverrides:
       name: grafana-loki-custom-overrides