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Integrate Grafana with Dragonfly operator

In this guide, we are going to see how we can setup Grafana dashboard to monitor Dragonfly pods in kubernetes cluster.

Prerequisites​

If you already have Grafana instance in your cluster, use grafana-dashboard.json to import the dashboard.

Install Grafana helm chart​

We'll be using grafana helm chart to setup Grafana. So make sure you have Helm installed.

helm repo add grafana https://grafana.github.io/helm-charts
helm install grafana-ui grafana/grafana

Once you run the command, grafana will create all the necessary resources to setup grafana. Run the below command to check if all resources are created successfully.

$ kubectl get all
NAME                                       READY   STATUS    RESTARTS        AGE
pod/dragonfly-sample-0                     1/1     Running   1 (171m ago)    23h
pod/dragonfly-sample-1                     1/1     Running   1 (171m ago)    23h
pod/grafana-ui-785f79fb65-rmk52            1/1     Running   1 (171m ago)    23h
pod/prometheus-operator-744c6bb8f9-vnxw4   1/1     Running   10 (170m ago)   8d
pod/prometheus-prometheus-0                2/2     Running   0               167m

NAME                          TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/dragonfly-sample      ClusterIP   10.96.2.149     <none>        6379/TCP   23h
service/grafana-ui            ClusterIP   10.96.146.235   <none>        80/TCP     23h
service/kubernetes            ClusterIP   10.96.0.1       <none>        443/TCP    33d
service/prometheus-operated   ClusterIP   None            <none>        9090/TCP   167m
service/prometheus-operator   ClusterIP   None            <none>        8080/TCP   8d

NAME                                  READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/grafana-ui            1/1     1            1           23h
deployment.apps/prometheus-operator   1/1     1            1           8d

NAME                                             DESIRED   CURRENT   READY   AGE
replicaset.apps/grafana-ui-785f79fb65            1         1         1       23h
replicaset.apps/prometheus-operator-744c6bb8f9   1         1         1       8d

NAME                                     READY   AGE
statefulset.apps/dragonfly-sample        2/2     23h
statefulset.apps/prometheus-prometheus   1/1     167m

Create Prometheus Service​

Create a Prometheus Service to let Grafana access prometheus through it. If you already have a Prometheus Service object, move to the next step.

kubectl apply -f https://raw.githubusercontent.com/dragonflydb/dragonfly-operator/main/monitoring/prometheus-service.yaml

Note that it is required to use prometheus: prometheus label as selector (if no label is given to the existing Prometheus object). The prometheus operator exposes a port named web, so you can use this port as targetPort in the service.

Create Grafana dashboard​

The helm chart also creates a grafana-ui service which you can use to port-forward the grafana port.

kubectl port-forward services/grafana-ui 3000:80

Now go to localhost:3000. You will see a grafana dashboard running in the localhost. add a Prometheus data source. Use http://prometheus-svc:9090 as the datasource url. After that, import grafana-dashboard.json to the dashboard.