Monitor

Reference

• https://docs.pingcap.com/zh/tidb/stable/tidb-monitoring-framework
• https://docs.pingcap.com/zh/tidb-in-kubernetes/stable/monitor-a-tidb-cluster

Install Monitor

1. Prepare secret "basic-grafana-credentials"

   kubectl -n tidb-cluster create secret generic basic-grafana-credentials \
   --from-literal=username=admin \
   --from-literal=password=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 16)

2. prepare tidb-monitor.yaml

   apiVersion: pingcap.com/v1alpha1
   kind: TidbMonitor
   metadata:
   name: basic
   spec:
   clusters:
       - name: basic
   prometheus:
       baseImage: m.daocloud.io/docker.io/prom/prometheus
       version: v2.27.1
   grafana:
       baseImage: m.daocloud.io/docker.io/grafana/grafana
       version: 7.5.11
       usernameSecret:
       name: basic-grafana-credentials
       key: username
       passwordSecret:
       name: basic-grafana-credentials
       key: password
   initializer:
       baseImage: m.daocloud.io/docker.io/pingcap/tidb-monitor-initializer
       version: v8.5.0
   reloader:
       baseImage: m.daocloud.io/docker.io/pingcap/tidb-monitor-reloader
       version: v1.0.1
   prometheusReloader:
       baseImage: m.daocloud.io/quay.io/prometheus-operator/prometheus-config-reloader
       version: v0.49.0
   imagePullPolicy: IfNotPresent

3. Apply

   kubectl -n tidb-cluster apply -f tidb-monitor.yaml

See metrics in grafana

1. Get granama username and password.

   kubectl -n tidb-cluster get secret basic-grafana-credentials -o jsonpath="{.data.username}" | base64 -d && echo
   kubectl -n tidb-cluster get secret basic-grafana-credentials -o jsonpath="{.data.password}" | base64 -d && echo

2. port-forward the Grafana service

   kubectl -n tidb-cluster port-forward svc/basic-grafana 31641:3000 --address 0.0.0.0

3. Browsing the grafana website.