forked from open-telemetry/opentelemetry-collector
-
Notifications
You must be signed in to change notification settings - Fork 0
/
factory.go
100 lines (83 loc) · 2.64 KB
/
factory.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
// Copyright 2019, OpenTelemetry 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 prometheusexporter
import (
"net"
"net/http"
"strings"
"github.com/orijtech/prometheus-go-metrics-exporter"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector/config/configerror"
"github.com/open-telemetry/opentelemetry-collector/config/configmodels"
"github.com/open-telemetry/opentelemetry-collector/exporter"
)
const (
// The value of "type" key in configuration.
typeStr = "prometheus"
)
// Factory is the factory for Prometheus exporter.
type Factory struct {
}
// Type gets the type of the Exporter config created by this factory.
func (f *Factory) Type() string {
return typeStr
}
// CreateDefaultConfig creates the default configuration for exporter.
func (f *Factory) CreateDefaultConfig() configmodels.Exporter {
return &Config{
ExporterSettings: configmodels.ExporterSettings{
TypeVal: typeStr,
NameVal: typeStr,
},
ConstLabels: map[string]string{},
}
}
// CreateTraceExporter creates a trace exporter based on this config.
func (f *Factory) CreateTraceExporter(logger *zap.Logger, config configmodels.Exporter) (exporter.TraceExporter, error) {
return nil, configerror.ErrDataTypeIsNotSupported
}
// CreateMetricsExporter creates a metrics exporter based on this config.
func (f *Factory) CreateMetricsExporter(logger *zap.Logger, cfg configmodels.Exporter) (exporter.MetricsExporter, error) {
pcfg := cfg.(*Config)
addr := strings.TrimSpace(pcfg.Endpoint)
if addr == "" {
return nil, errBlankPrometheusAddress
}
opts := prometheus.Options{
Namespace: pcfg.Namespace,
ConstLabels: pcfg.ConstLabels,
}
pe, err := prometheus.New(opts)
if err != nil {
return nil, err
}
ln, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
// The Prometheus metrics exporter has to run on the provided address
// as a server that'll be scraped by Prometheus.
mux := http.NewServeMux()
mux.Handle("/metrics", pe)
srv := &http.Server{Handler: mux}
go func() {
_ = srv.Serve(ln)
}()
pexp := &prometheusExporter{
name: cfg.Name(),
exporter: pe,
shutdown: ln.Close,
}
return pexp, nil
}