mirror of
https://github.com/grafana/grafana.git
synced 2024-11-30 12:44:10 -06:00
129 lines
2.5 KiB
Go
129 lines
2.5 KiB
Go
package tracing
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"strings"
|
|
|
|
"github.com/grafana/grafana/pkg/log"
|
|
"github.com/grafana/grafana/pkg/registry"
|
|
"github.com/grafana/grafana/pkg/setting"
|
|
|
|
opentracing "github.com/opentracing/opentracing-go"
|
|
jaegercfg "github.com/uber/jaeger-client-go/config"
|
|
)
|
|
|
|
func init() {
|
|
registry.RegisterService(&TracingService{})
|
|
}
|
|
|
|
type TracingService struct {
|
|
enabled bool
|
|
address string
|
|
customTags map[string]string
|
|
samplerType string
|
|
samplerParam float64
|
|
log log.Logger
|
|
closer io.Closer
|
|
|
|
Cfg *setting.Cfg `inject:""`
|
|
}
|
|
|
|
func (ts *TracingService) Init() error {
|
|
ts.log = log.New("tracing")
|
|
ts.parseSettings()
|
|
|
|
if ts.enabled {
|
|
ts.initGlobalTracer()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (ts *TracingService) parseSettings() {
|
|
var section, err = ts.Cfg.Raw.GetSection("tracing.jaeger")
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
ts.address = section.Key("address").MustString("")
|
|
if ts.address != "" {
|
|
ts.enabled = true
|
|
}
|
|
|
|
ts.customTags = splitTagSettings(section.Key("always_included_tag").MustString(""))
|
|
ts.samplerType = section.Key("sampler_type").MustString("")
|
|
ts.samplerParam = section.Key("sampler_param").MustFloat64(1)
|
|
}
|
|
|
|
func (ts *TracingService) initGlobalTracer() error {
|
|
cfg := jaegercfg.Configuration{
|
|
Disabled: !ts.enabled,
|
|
Sampler: &jaegercfg.SamplerConfig{
|
|
Type: ts.samplerType,
|
|
Param: ts.samplerParam,
|
|
},
|
|
Reporter: &jaegercfg.ReporterConfig{
|
|
LogSpans: false,
|
|
LocalAgentHostPort: ts.address,
|
|
},
|
|
}
|
|
|
|
jLogger := &jaegerLogWrapper{logger: log.New("jaeger")}
|
|
|
|
options := []jaegercfg.Option{}
|
|
options = append(options, jaegercfg.Logger(jLogger))
|
|
|
|
for tag, value := range ts.customTags {
|
|
options = append(options, jaegercfg.Tag(tag, value))
|
|
}
|
|
|
|
tracer, closer, err := cfg.New("grafana", options...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
opentracing.InitGlobalTracer(tracer)
|
|
|
|
ts.closer = closer
|
|
|
|
return nil
|
|
}
|
|
|
|
func (ts *TracingService) Run(ctx context.Context) error {
|
|
<-ctx.Done()
|
|
|
|
if ts.closer != nil {
|
|
ts.log.Info("Closing tracing")
|
|
ts.closer.Close()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func splitTagSettings(input string) map[string]string {
|
|
res := map[string]string{}
|
|
|
|
tags := strings.Split(input, ",")
|
|
for _, v := range tags {
|
|
kv := strings.Split(v, ":")
|
|
if len(kv) > 1 {
|
|
res[kv[0]] = kv[1]
|
|
}
|
|
}
|
|
|
|
return res
|
|
}
|
|
|
|
type jaegerLogWrapper struct {
|
|
logger log.Logger
|
|
}
|
|
|
|
func (jlw *jaegerLogWrapper) Error(msg string) {
|
|
jlw.logger.Error(msg)
|
|
}
|
|
|
|
func (jlw *jaegerLogWrapper) Infof(msg string, args ...interface{}) {
|
|
jlw.logger.Info(msg, args)
|
|
}
|