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add example for dbstatscollector #1659

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add example for dbstatscollector #1659

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13df7a9
add example for dbstatscollector
Manask322 Oct 21, 2024
7a774d0
Merge branch 'main' into dbstatscollectorexample
Manask322 Oct 21, 2024
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64 changes: 64 additions & 0 deletions examples/dbstatscollectorexample/main.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,64 @@
// Copyright 2022 The Prometheus Authors
// 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.

// A minimal example of how to include Prometheus instrumentation for database stats.
package main

import (
"database/sql"
"flag"
"fmt"
"log"
"net/http"
"time"

_ "github.com/mattn/go-sqlite3"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"github.com/prometheus/client_golang/prometheus/promhttp"
)

var addr = flag.String("listen-address", ":8080", "The address to listen on for HTTP requests.")

func main() {
flag.Parse()

// Set up an in-memory SQLite DB.
db, err := sql.Open("sqlite3", ":memory:") // In-memory SQLite database
if err != nil {
log.Fatalf("Failed to connect to in-memory database: %v", err)
}
defer db.Close()

// Set connection pool limits to simulate more activity.
db.SetMaxOpenConns(10)
db.SetMaxIdleConns(5)
db.SetConnMaxIdleTime(5 * time.Minute)
db.SetConnMaxLifetime(30 * time.Minute)

// Create a new Prometheus registry.
reg := prometheus.NewRegistry()

// Create and register the DB stats collector.
dbStatsCollector := collectors.NewDBStatsCollector(db, "sqlite_in_memory")
reg.MustRegister(dbStatsCollector)

// Expose the registered metrics via HTTP.
http.Handle("/metrics", promhttp.HandlerFor(
reg,
promhttp.HandlerOpts{},
))

fmt.Println("Server is running, metrics are available at /metrics")
log.Fatal(http.ListenAndServe(*addr, nil))
}
1 change: 1 addition & 0 deletions go.mod
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Expand Up @@ -9,6 +9,7 @@ require (
github.com/json-iterator/go v1.1.12
github.com/klauspost/compress v1.17.10
github.com/kylelemons/godebug v1.1.0
github.com/mattn/go-sqlite3 v1.14.24
github.com/prometheus/client_model v0.6.1
github.com/prometheus/common v0.59.1
github.com/prometheus/procfs v0.15.1
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2 changes: 2 additions & 0 deletions go.sum
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Expand Up @@ -21,6 +21,8 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
github.com/mattn/go-sqlite3 v1.14.24 h1:tpSp2G2KyMnnQu99ngJ47EIkWVmliIizyZBfPrBWDRM=
github.com/mattn/go-sqlite3 v1.14.24/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
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