-
Notifications
You must be signed in to change notification settings - Fork 112
/
trace.go
168 lines (146 loc) · 4.8 KB
/
trace.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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
// Copyright 2018-2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package trace
import (
"context"
"fmt"
"net/url"
"os"
"strings"
"sync"
"go.opentelemetry.io/otel/exporters/jaeger"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
var (
// Propagator is the default Reva propagator.
Propagator = propagation.NewCompositeTextMapPropagator(propagation.Baggage{}, propagation.TraceContext{})
defaultProvider = revaDefaultTracerProvider{
provider: trace.NewNoopTracerProvider(),
}
)
type revaDefaultTracerProvider struct {
mutex sync.RWMutex
initialized bool
provider trace.TracerProvider
}
type ctxKey struct{}
// ContextSetTracerProvider returns a copy of ctx with p associated.
func ContextSetTracerProvider(ctx context.Context, p trace.TracerProvider) context.Context {
if tp, ok := ctx.Value(ctxKey{}).(trace.TracerProvider); ok {
if tp == p {
return ctx
}
}
return context.WithValue(ctx, ctxKey{}, p)
}
// ContextGetTracerProvider returns the TracerProvider associated with the ctx.
// If no TracerProvider is associated is associated, the global default TracerProvider
// is returned
func ContextGetTracerProvider(ctx context.Context) trace.TracerProvider {
if p, ok := ctx.Value(ctxKey{}).(trace.TracerProvider); ok {
return p
}
return DefaultProvider()
}
// InitDefaultTracerProvider initializes a global default TracerProvider at a package level.
func InitDefaultTracerProvider(collectorEndpoint string, agentEndpoint string) {
defaultProvider.mutex.Lock()
defer defaultProvider.mutex.Unlock()
if !defaultProvider.initialized {
defaultProvider.provider = GetTracerProvider(true, collectorEndpoint, agentEndpoint, "reva default provider")
}
defaultProvider.initialized = true
}
// DefaultProvider returns the "global" default TracerProvider
func DefaultProvider() trace.TracerProvider {
defaultProvider.mutex.RLock()
defer defaultProvider.mutex.RUnlock()
return defaultProvider.provider
}
// GetTracerProvider returns a new TracerProvider, configure for the specified service
func GetTracerProvider(enabled bool, collectorEndpoint string, agentEndpoint, serviceName string) trace.TracerProvider {
if !enabled {
return trace.NewNoopTracerProvider()
}
// default to 'reva' as service name if not set
if serviceName == "" {
serviceName = "reva"
}
var exp *jaeger.Exporter
var err error
if agentEndpoint != "" {
var agentHost string
var agentPort string
agentHost, agentPort, err = parseAgentConfig(agentEndpoint)
if err != nil {
panic(err)
}
exp, err = jaeger.New(
jaeger.WithAgentEndpoint(
jaeger.WithAgentHost(agentHost),
jaeger.WithAgentPort(agentPort),
),
)
if err != nil {
panic(err)
}
}
if collectorEndpoint != "" {
exp, err = jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(collectorEndpoint)))
if err != nil {
panic(err)
}
}
hostname, err := os.Hostname()
if err != nil {
panic(err)
}
return sdktrace.NewTracerProvider(
sdktrace.WithBatcher(exp),
sdktrace.WithResource(resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceNameKey.String(serviceName),
semconv.HostNameKey.String(hostname),
)),
)
}
func parseAgentConfig(ae string) (string, string, error) {
u, err := url.Parse(ae)
// as per url.go:
// [...] Trying to parse a hostname and path
// without a scheme is invalid but may not necessarily return an
// error, due to parsing ambiguities.
if err == nil && u.Hostname() != "" && u.Port() != "" {
return u.Hostname(), u.Port(), nil
}
p := strings.Split(ae, ":")
if len(p) != 2 {
return "", "", fmt.Errorf(fmt.Sprintf("invalid agent endpoint `%s`. expected format: `hostname:port`", ae))
}
switch {
case p[0] == "" && p[1] == "": // case ae = ":"
return "", "", fmt.Errorf(fmt.Sprintf("invalid agent endpoint `%s`. expected format: `hostname:port`", ae))
case p[0] == "":
return "", "", fmt.Errorf(fmt.Sprintf("invalid agent endpoint `%s`. expected format: `hostname:port`", ae))
}
return p[0], p[1], nil
}