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Memcached Grafana Dashboard

KubeDB exposes Memcached metrics through a sidecar exporter, and its own view of each resource (status, phase, version) through Panopticon. Once Prometheus is scraping both, you can visualize them in Grafana using pre-built KubeDB dashboards. This tutorial walks through the full setup: deploying the monitoring stack, enabling monitoring on a Memcached instance, and importing the Grafana dashboards.

Before You Begin

• You need a Kubernetes cluster with kubectl configured. If you do not already have a cluster, you can create one by using kind.

• KubeDB must be installed in your cluster with kubedb-metrics enabled. Follow the setup guide here and make sure to include the flag below during installation:

  --set kubedb-metrics.enabled=true
  

  kubedb-metrics creates MetricsConfiguration objects for each database type, which Panopticon (see Configuration) uses to expose metrics to Prometheus.

• To keep monitoring resources isolated, we use a separate monitoring namespace and deploy the database in the demo namespace.

  $ kubectl create ns monitoring
  namespace/monitoring created
  
  $ kubectl create ns demo
  namespace/demo created
  

• Before proceeding, complete the Configuration steps to deploy kube-prometheus-stack and Panopticon.

Note: YAML files used in this tutorial are stored in docs/examples/memcached/monitoring folder in GitHub repository kubedb/docs.

Setup

Step 1: Deploy Memcached

Below is the Memcached object with monitoring configured to use Prometheus Operator.

apiVersion: kubedb.com/v1
kind: Memcached
metadata:
  name: memcached-grafana-demo
  namespace: demo
spec:
  version: "1.6.22"
  replicas: 1
  deletionPolicy: WipeOut
  podTemplate:
    spec:
      containers:
      - name: memcached
        resources:
          limits:
            cpu: 500m
            memory: 128Mi
          requests:
            cpu: 250m
            memory: 64Mi
  monitor:
    agent: prometheus.io/operator
    prometheus:
      serviceMonitor:
        labels:
          release: prometheus
        interval: 10s

Here,

• monitor.agent: prometheus.io/operator tells KubeDB to create a ServiceMonitor for this instance.
• monitor.prometheus.serviceMonitor.labels must match the serviceMonitorSelector label of your Prometheus (release: prometheus).
• monitor.prometheus.serviceMonitor.interval sets the scrape interval to 10 seconds.

Create the Memcached instance:

$ kubectl create -f https://github.com/kubedb/docs/raw/v2026.7.10/docs/examples/memcached/monitoring/memcached-grafana-demo.yaml
memcached.kubedb.com/memcached-grafana-demo created

Wait for it to be Ready:

$ kubectl get memcached -n demo memcached-grafana-demo
NAME                     VERSION   STATUS   AGE
memcached-grafana-demo   1.6.22    Ready    2m

KubeDB creates a stats service named {memcached-name}-stats for the exporter:

$ kubectl get svc -n demo --selector="app.kubernetes.io/instance=memcached-grafana-demo"
NAME                          TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)     AGE
memcached-grafana-demo        ClusterIP   10.96.10.1    <none>        11211/TCP   2m
memcached-grafana-demo-stats  ClusterIP   10.96.10.2    <none>        56790/TCP   2m

KubeDB also creates a ServiceMonitor in the demo namespace:

$ kubectl get servicemonitor -n demo
NAME                          AGE
memcached-grafana-demo-stats  2m

Verify it carries the correct label:

$ kubectl get servicemonitor -n demo memcached-grafana-demo-stats -o jsonpath='{.metadata.labels}'
{"release":"prometheus", ...}

Step 2: Verify Prometheus is Scraping

Port-forward the Prometheus pod:

$ kubectl port-forward -n monitoring \
  prometheus-prometheus-kube-prometheus-prometheus-0 9090
Forwarding from 127.0.0.1:9090 -> 9090
Forwarding from [::1]:9090 -> 9090

Open http://localhost:9090/targets in your browser. Look for an entry whose service label matches memcached-grafana-demo-stats. Its state should be UP.

If the target is missing, check that the ServiceMonitor label (release: prometheus) matches the Prometheus serviceMonitorSelector.

Step 3: Access Grafana

Port-forward the Grafana service:

$ kubectl port-forward -n monitoring svc/prometheus-grafana 3000:80
Forwarding from 127.0.0.1:3000 -> 80

Open http://localhost:3000. The username is admin. Retrieve the auto-generated password from the secret:

$ kubectl get secret -n monitoring prometheus-grafana \
  -o jsonpath='{.data.admin-password}' | base64 -d

After a successful login you will see the Grafana home page:

Step 4: Configure Prometheus as a Data Source

If you installed Grafana via kube-prometheus-stack, Prometheus is already configured as the default data source — skip to Step 5.

If you’re using a different Grafana instance than the one installed in the Configuration prerequisite (linked in “Before You Begin” above), add Prometheus as a data source manually:

1. Go to Connections → Data sources → Add new data source.

2. Select Prometheus.

3. Set the URL to your Prometheus service:

   http://prometheus-operated.monitoring.svc:9090
   

4. Click Save & test. You should see Data source is working.

Step 5: Import Dashboard — Option A: Automatic (chart)

Rather than downloading and uploading each JSON file by hand (Option B below), KubeDB ships a chart that creates all matching dashboards for you as GrafanaDashboard custom resources. A separate controller, grafana-operator, watches these resources and pushes the actual dashboard JSON into your Grafana instance — both pieces are required.

1. Install grafana-operator (skip if it’s already running in your cluster):

$ helm repo add appscode https://charts.appscode.com/stable/
$ helm repo update

$ helm upgrade --install grafana-operator appscode/grafana-operator \
    --version v2026.6.12 \
    --namespace kubeops --create-namespace

2. Register your Grafana instance as an AppBinding (skip if you’ve already done this in another guide on this cluster). grafana-operator needs to know where to push dashboards and how to authenticate — it reads this from an AppBinding object, not from the chart install command itself. Since Grafana here came bundled with kube-prometheus-stack, reuse its existing admin credentials:

$ kubectl port-forward -n monitoring svc/prometheus-grafana 3000:80 &

$ curl -s -X POST -H "Content-Type: application/json" \
    -u admin:<grafana_password> \
    http://localhost:3000/api/auth/keys \
    -d '{"name":"kubedb-dashboards","role":"Admin"}'
# Note the returned "key"

$ kill %1

$ kubectl create secret generic grafana-admin-token -n monitoring \
    --from-literal=token='<key-from-above>'

$ cat <<EOF | kubectl apply -f -
apiVersion: appcatalog.appscode.com/v1alpha1
kind: AppBinding
metadata:
  name: grafana
  namespace: monitoring
spec:
  type: monitoring.appscode.com/grafana
  clientConfig:
    url: http://prometheus-grafana.monitoring.svc:80
  secret:
    name: grafana-admin-token
EOF

3. Install the dashboards:

The chart packages dashboard JSON for every database it supports, so install it from a copy trimmed down to just Memcached’s dashboards (this also keeps grafana-operator from creating dashboards for databases you don’t run):

$ helm pull appscode/kubedb-grafana-dashboards --version v2026.7.10 --untar

$ cd kubedb-grafana-dashboards/dashboards
$ ls | grep -v '^memcached$' | xargs rm -rf   # keep only dashboards/memcached
$ cd ../..

$ helm package kubedb-grafana-dashboards
Successfully packaged chart and saved it to: kubedb-grafana-dashboards-v2026.7.10.tgz

$ helm upgrade -i kubedb-grafana-dashboards-memcached ./kubedb-grafana-dashboards-v2026.7.10.tgz \
    -n kubeops --create-namespace \
    --set grafana.name=grafana \
    --set grafana.namespace=monitoring

Use a release name unique to this database (kubedb-grafana-dashboards-memcached), not the plain kubedb-grafana-dashboards name — if you also follow another DB’s Grafana Dashboard guide on this same cluster, each helm upgrade -i under a shared release name would prune the previous DB’s dashboards (Helm removes anything not in the new release’s manifest). A per-DB release name lets them coexist.

grafana.name/grafana.namespace point the chart’s GrafanaDashboard resources at the AppBinding created in step 2 (omitting them falls back to whichever AppBinding in your cluster is labeled as the cluster-default Grafana, if any — explicit is safer on a shared cluster). No need to touch featureGates — with every other database’s dashboards/ folder removed, their gates simply match zero files and render nothing, regardless of being true by default.

This creates every dashboard the chart ships for Memcached — KubeDB / Memcached / Summary, KubeDB / Memcached / Pod, KubeDB / Memcached / Database — which grafana-operator then pushes into your Grafana instance automatically. No manual JSON download or upload needed.

Verify they landed:

$ kubectl get grafanadashboards.openviz.dev -n kubeops | grep -i memcached
NAME                                 TITLE                            SYNCED    AGE
grafana-kubedb-memcached-summary     KubeDB / Memcached / Summary     Current   30s
grafana-kubedb-memcached-pod         KubeDB / Memcached / Pod         Current   30s
grafana-kubedb-memcached-database    KubeDB / Memcached / Database    Current   30s

SYNCED: Current confirms grafana-operator successfully pushed each dashboard into Grafana. Open Grafana — the dashboards are already there under Dashboards, fully wired to your Prometheus data source, ready to explore in Step 6 below.

If the SYNCED column is missing entirely from your output (not just showing a non-Current value), grafana-operator most likely never processed the resource at all. Check that the operator pod is actually running (kubectl get pods -n kubeops -l app.kubernetes.io/name=grafana-operator), inspect its logs for AppBinding/auth errors (kubectl logs -n kubeops deploy/grafana-operator), and check kubectl get grafanadashboards.openviz.dev -n kubeops <name> -o yaml for status.conditions — the CR existing only means kubectl accepted it, not that it reached Grafana.

After importing them, they will appear under Dashboards in the left sidebar as well:

Step 5: Import Dashboard — Option B: Manual (JSON upload)

If you’d rather not run grafana-operator, or want fine-grained control over exactly which dashboards get imported, upload the same dashboard JSON files by hand instead.

The KubeDB Memcached dashboards are distributed as JSON files. Each JSON file is a complete dashboard definition — panels, queries, variables, and layout — that Grafana loads in one shot. Without importing, you would have to build every panel and write every PromQL query by hand. Importing lets you skip that entirely.

Three dashboards are available. Download the JSON files from the appscode/grafana-dashboards repository (memcached/ folder):

Import steps (repeat for each file):

1. In Grafana, click Dashboards in the left sidebar.
2. Select Import from the menu.
3. Click Upload dashboard JSON file and select one of the downloaded .json files.
4. In the Prometheus dropdown that appears, select your Prometheus data source.
5. Click Import.

The import page looks like this:

After importing the files, they will appear under Dashboards in the left sidebar.

Step 6: Explore the Dashboards

After opening a dashboard, use the dropdown filters at the top to focus on a specific instance.

KubeDB / Memcached / Summary — instance-level overview:

• General Info — database status, version, whether secure transport is required, deletion policy, total nodes
• Resource Requests / Limits — configured CPU, memory, and storage requests and limits
• CPU Info / CPU Quota — CPU usage over time and per-pod quota utilization (usage vs. requests/limits)

KubeDB / Memcached / Pod — per-pod drill-down:

• % Hit Ratio / % Get Ratio — cache effectiveness for this pod
• Commands — rate of cas, decr, delete, flush, get, incr, set, touch operations
• Connections — active client connections on this pod
• Storage — memory used vs. free
• Items — number of items stored, used vs. free capacity
• Evictions / Reclaimed — items evicted due to memory pressure vs. reclaimed from expired entries
• Network — read and write throughput

KubeDB / Memcached / Database — instance health and throughput:

• Instance State — whether the instance is UP or DOWN
• Up Time — how long the instance has been running
• Connections — current active connections
• QPS — queries per second
• Memory Usage Ratio — memory used as a percentage of the configured limit
• Items — number of items currently stored
• QPS / Connections / Read-Write — the same metrics plotted over time for trend analysis

Cleaning up

# Remove the Memcached instance
kubectl delete memcached -n demo memcached-grafana-demo

# Remove namespaces
kubectl delete ns demo

# Uninstall the Grafana dashboards chart, if you used Option A
helm uninstall kubedb-grafana-dashboards-memcached -n kubeops

# Uninstall grafana-operator (optional — skip if other DB guides on this cluster still use it)
helm uninstall grafana-operator -n kubeops

# Uninstall monitoring stack (optional)
helm uninstall prometheus -n monitoring
helm uninstall panopticon -n kubeops
kubectl delete ns monitoring kubeops

Next Steps

• Monitor your Memcached database with KubeDB using built-in Prometheus.
• Monitor your Memcached database with KubeDB using Prometheus Operator.
• Want to hack on KubeDB? Check our contribution guidelines.