/
jaeger.go
116 lines (104 loc) · 2.65 KB
/
jaeger.go
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package jaeger
import (
"errors"
"fmt"
"strconv"
"strings"
"time"
opentracing "github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go/config"
"github.com/uber/jaeger-lib/metrics/prometheus"
)
const (
defServiceName = "skipper"
)
func InitTracer(opts []string) (opentracing.Tracer, error) {
metricsFactory := prometheus.New()
useRPCMetrics := false
serviceName := defServiceName
var err error
var samplerParam float64
var samplerType string
var samplerURL string
var localAgent string
var reporterQueue int64
var reporterInterval time.Duration
for _, o := range opts {
parts := strings.SplitN(o, "=", 2)
switch parts[0] {
case "service-name":
if len(parts) > 1 {
serviceName = parts[1]
}
case "use-rpc-metrics":
useRPCMetrics = true
case "sampler-type":
if len(parts) == 1 {
return nil, missingArg(parts[0])
}
samplerValue := parts[1]
parts = strings.SplitN(samplerValue, ":", 2)
samplerType = parts[0]
switch samplerType {
case "const":
samplerParam = 1.0
case "probabilistic", "rateLimiting", "remote":
if len(parts) == 1 {
return nil, missingArg(parts[1])
}
samplerParam, err = strconv.ParseFloat(parts[1], 64)
if err != nil {
return nil, invalidArg(parts[1], err)
}
default:
return nil, invalidArg(parts[0], errors.New("invalid sampler type"))
}
case "sampler-url":
if len(parts) == 1 {
return nil, missingArg(parts[0])
}
samplerURL = parts[1]
case "reporter-queue":
if len(parts) == 1 {
return nil, missingArg(parts[0])
}
reporterQueue, _ = strconv.ParseInt(parts[1], 10, 64)
case "reporter-interval":
if len(parts) == 1 {
return nil, missingArg(parts[0])
}
reporterInterval, err = time.ParseDuration(parts[1])
if err != nil {
return nil, invalidArg(parts[1], err)
}
case "local-agent":
if len(parts) == 1 {
return nil, missingArg(parts[0])
}
localAgent = parts[1]
}
}
conf := &config.Configuration{
ServiceName: serviceName,
Disabled: false,
Sampler: &config.SamplerConfig{
Type: samplerType,
Param: samplerParam,
SamplingServerURL: samplerURL,
},
Reporter: &config.ReporterConfig{
QueueSize: int(reporterQueue),
BufferFlushInterval: reporterInterval,
LocalAgentHostPort: localAgent,
},
RPCMetrics: useRPCMetrics,
}
tracer, _, err := conf.NewTracer(config.Metrics(metricsFactory))
return tracer, err
}
func missingArg(opt string) error {
return fmt.Errorf("missing argument for %s option", opt)
}
func invalidArg(opt string, err error) error {
return fmt.Errorf("invalid argument for %s option: %s", opt, err)
}