Sign InTry Free

Access TiDB Dashboard

TiDB Dashboard is a visualized tool introduced starting from TiDB 4.0 and is used to monitor and diagnose TiDB clusters. For details, see TiDB Dashboard.

This document describes how to access TiDB Dashboard in Kubernetes.

Prerequisites

To access TiDB Dashboard smoothly in Kubernetes, you need to use TiDB Operator v1.1.1 (or later versions) and the TiDB cluster (v4.0.1 or later versions).

You need to configure the TidbCluster object file as follows to enable quick access to TiDB Dashboard:

apiVersion: pingcap.com/v1alpha1 kind: TidbCluster metadata: name: basic spec: pd: enableDashboardInternalProxy: true

Access TiDB Dashboard by port forward

TiDB Dashboard is built in the PD component in TiDB 4.0 and later versions. You can refer to the following example to quickly deploy a v4.0.4 TiDB cluster in Kubernetes.

  1. Deploy the following .yaml file into the Kubernetes cluster by running the kubectl apply -f command:

    apiVersion: pingcap.com/v1alpha1 kind: TidbCluster metadata: name: basic spec: version: v5.0.6 timezone: UTC pvReclaimPolicy: Delete pd: enableDashboardInternalProxy: true baseImage: pingcap/pd replicas: 1 requests: storage: "1Gi" config: {} tikv: baseImage: pingcap/tikv replicas: 1 requests: storage: "1Gi" config: {} tidb: baseImage: pingcap/tidb replicas: 1 service: type: ClusterIP config: {}
  2. After the cluster is created, expose TiDB Dashboard to the local machine by running the following command:

    kubectl port-forward svc/basic-discovery -n ${namespace} 10262:10262
  3. Visit http://localhost:10262/dashboard in your browser to access TiDB Dashboard.

Access TiDB Dashboard by Ingress

In important production environments, it is recommended to expose the TiDB Dashboard service using Ingress.

Prerequisites

Before using Ingress, install the Ingress controller in your Kubernetes cluster. Otherwise, simply creating Ingress resources does not take effect.

To deploy the Ingress controller, refer to ingress-nginx. You can also choose from various Ingress controllers.

Use Ingress

You can expose the TiDB Dashboard service outside the Kubernetes cluster by using Ingress. In this way, the service can be accessed outside Kubernetes via http/https. For more details, see Ingress.

The following is an .yaml example of accessing TiDB Dashboard using Ingress:

  1. Deploy the following .yaml file to the Kubernetes cluster by running the kubectl apply -f command:

    apiVersion: extensions/v1beta1 kind: Ingress metadata: name: access-dashboard namespace: ${namespace} spec: rules: - host: ${host} http: paths: - backend: serviceName: ${cluster_name}-discovery servicePort: 10262 path: /dashboard
  2. After Ingress is deployed, you can access TiDB Dashboard via http://${host}/dashboard outside the Kubernetes cluster.

Enable Ingress TLS

Ingress supports TLS. See Ingress TLS. The following example shows how to use Ingress TLS:

apiVersion: extensions/v1beta1 kind: Ingress metadata: name: access-dashboard namespace: ${namespace} spec: tls: - hosts: - ${host} secretName: testsecret-tls rules: - host: ${host} http: paths: - backend: serviceName: ${cluster_name}-discovery servicePort: 10262 path: /dashboard

In the above file, testsecret-tls contains tls.crt and tls.key needed for example.com.

This is an example of testsecret-tls:

apiVersion: v1 kind: Secret metadata: name: testsecret-tls namespace: default data: tls.crt: base64 encoded cert tls.key: base64 encoded key type: kubernetes.io/tls

After Ingress is deployed, visit https://{host}/dashboard to access TiDB Dashboard.

Use NodePort Service

Because ingress can only be accessed with a domain name, it might be difficult to use ingress in some scenarios. In this case, to access and use TiDB Dashboard, you can add a Service of NodePort type.

The following is an .yaml example using the Service of NodePort type to access the TiDB Dashboard. To deploy the following .yaml file into the Kubernetes cluster, you can run the kubectl apply -f command:

apiVersion: v1 kind: Service metadata: name: access-dashboard namespace: ${namespace} spec: ports: - name: dashboard port: 10262 protocol: TCP targetPort: 10262 type: NodePort selector: app.kubernetes.io/component: discovery app.kubernetes.io/instance: ${cluster_name} app.kubernetes.io/name: tidb-cluster

After deploying the Service, you can access TiDB Dashboard via https://{nodeIP}:{nodePort}/dashboard. By default, nodePort is randomly assigned by Kubernetes. You can also specify an available port in the .yaml file.

Note that if there is more than one PD Pod in the cluster, you need to set spec.pd.enableDashboardInternalProxy: true in the TidbCluster CR to ensure normal access to TiDB Dashboard.

Update the TiDB cluster

To enable quick access to TiDB Dashboard by updating an existing TiDB cluster, update the following two configurations:

apiVersion: pingcap.com/v1alpha1 kind: TidbCluster metadata: name: basic spec: configUpdateStrategy: RollingUpdate pd: enableDashboardInternalProxy: true

Unsupported TiDB Dashboard features

Due to the special environment of Kubernetes, some features of TiDB Dashboard are not supported in TiDB Operator, including:

  • In Overview -> Monitor & Alert -> View Metrics, the link does not direct to the Grafana monitoring dashboard. If you need to access Grafana, refer to Access the Grafana monitoring dashboard.

  • The log search feature is unavailable. If you need to view the log of a component, execute kubectl logs ${pod_name} -n {namespace}. You can also view logs using the log service of the Kubernetes cluster.

  • In Cluster Info -> Hosts, the Disk Usage cannot display correctly. You can view the disk usage of each component by viewing the component dashboards in the TidbMonitor dashboard. You can also view the disk usage of Kubernetes nodes by deploying a Kubernetes host monitoring system.

Download PDF
Playground
New
One-stop & interactive experience of TiDB's capabilities WITHOUT registration.
Products
TiDB
TiDB Dedicated
TiDB Serverless
Pricing
Get Demo
Get Started
© 2024 PingCAP. All Rights Reserved.
Privacy Policy.