metrics: add grafana panel (pingcap#81)

pkg/metrics/balance.go

@@ -31,31 +31,31 @@ const (
 var (
 	BackendStatusGauge = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
-			Namespace: ModuleWeirProxy,
+			Namespace: ModuleProxy,
 			Subsystem: LabelBalance,
 			Name:      "b_status",
 			Help:      "Gauge of backend status.",
 		}, []string{LblBackend, LblStatus})
 
 	BackendConnGauge = prometheus.NewGaugeVec(
 		prometheus.GaugeOpts{
-			Namespace: ModuleWeirProxy,
+			Namespace: ModuleProxy,
 			Subsystem: LabelBalance,
 			Name:      "b_conn",
 			Help:      "Number of backend connections.",
 		}, []string{LblBackend})
 
 	MigrateCounter = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
-			Namespace: ModuleWeirProxy,
+			Namespace: ModuleProxy,
 			Subsystem: LabelBalance,
 			Name:      "migrate_total",
 			Help:      "Number and result of session migration.",
 		}, []string{LblFrom, LblTo, LblMigrateResult})
 
 	MigrateDurationHistogram = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
-			Namespace: ModuleWeirProxy,
+			Namespace: ModuleProxy,
 			Subsystem: LabelBalance,
 			Name:      "migrate_duration_millis",
 			Help:      "Bucketed histogram of migrating time (s) of sessions.",

pkg/metrics/grafana/generate_json.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Copyright 2022 PingCAP, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+go install github.com/google/go-jsonnet/cmd/jsonnet@latest
+git clone https://github.com/grafana/grafonnet-lib.git --depth=1
+
+export JSONNET_PATH=grafonnet-lib
+jsonnet tiproxy_summary.jsonnet > tiproxy_summary.json
+rm -rf $JSONNET_PATH
+