mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
// Copyright 2016 The etcd 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.
|
|
|
|
package clientv3_test
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
|
|
"go.etcd.io/etcd/clientv3"
|
|
|
|
grpcprom "github.com/grpc-ecosystem/go-grpc-prometheus"
|
|
"github.com/prometheus/client_golang/prometheus/promhttp"
|
|
"google.golang.org/grpc"
|
|
)
|
|
|
|
func ExampleClient_metrics() {
|
|
cli, err := clientv3.New(clientv3.Config{
|
|
Endpoints: endpoints,
|
|
DialOptions: []grpc.DialOption{
|
|
grpc.WithUnaryInterceptor(grpcprom.UnaryClientInterceptor),
|
|
grpc.WithStreamInterceptor(grpcprom.StreamClientInterceptor),
|
|
},
|
|
})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer cli.Close()
|
|
|
|
// get a key so it shows up in the metrics as a range RPC
|
|
cli.Get(context.TODO(), "test_key")
|
|
|
|
// listen for all Prometheus metrics
|
|
ln, err := net.Listen("tcp", ":0")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
donec := make(chan struct{})
|
|
go func() {
|
|
defer close(donec)
|
|
http.Serve(ln, promhttp.Handler())
|
|
}()
|
|
defer func() {
|
|
ln.Close()
|
|
<-donec
|
|
}()
|
|
|
|
// make an http request to fetch all Prometheus metrics
|
|
url := "http://" + ln.Addr().String() + "/metrics"
|
|
resp, err := http.Get(url)
|
|
if err != nil {
|
|
log.Fatalf("fetch error: %v", err)
|
|
}
|
|
b, err := ioutil.ReadAll(resp.Body)
|
|
resp.Body.Close()
|
|
if err != nil {
|
|
log.Fatalf("fetch error: reading %s: %v", url, err)
|
|
}
|
|
|
|
// confirm range request in metrics
|
|
for _, l := range strings.Split(string(b), "\n") {
|
|
if strings.Contains(l, `grpc_client_started_total{grpc_method="Range"`) {
|
|
fmt.Println(l)
|
|
break
|
|
}
|
|
}
|
|
// Output:
|
|
// grpc_client_started_total{grpc_method="Range",grpc_service="etcdserverpb.KV",grpc_type="unary"} 1
|
|
}
|