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Send tracing spans to Prometheus

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This commit is contained in:
Nigel Deakin
2017-10-20 16:30:19 +01:00
parent de4a20624d
commit 39feaf8b69
7 changed files with 1856 additions and 11 deletions
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33
api/server/server.go
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@@ -86,7 +86,7 @@ func New(ctx context.Context, ds models.Datastore, mq models.MessageQueue, logDB
}
setMachineId()
setTracer()
s.setTracer()
s.Router.Use(loggerWrap, traceWrap, panicWrap)
s.bindHandlers(ctx)
@@ -117,7 +117,7 @@ func traceWrap(c *gin.Context) {
c.Next()
}
func setTracer() {
func (s *Server) setTracer() {
var (
debugMode = false
serviceName = "fn-server"
@@ -126,25 +126,40 @@ func setTracer() {
// ex: "http://zipkin:9411/api/v1/spans"
)
if zipkinHTTPEndpoint == "" {
return
var collector zipkintracer.Collector
// custom Zipkin collector to send tracing spans to Prometheus
promCollector, promErr := NewPrometheusCollector(s.Agent)
if promErr != nil {
logrus.WithError(promErr).Fatalln("couldn't start Prometheus trace collector")
}
logger := zipkintracer.LoggerFunc(func(i ...interface{}) error { logrus.Error(i...); return nil })
collector, err := zipkintracer.NewHTTPCollector(zipkinHTTPEndpoint, zipkintracer.HTTPLogger(logger))
if err != nil {
logrus.WithError(err).Fatalln("couldn't start trace collector")
if zipkinHTTPEndpoint != "" {
// Custom PrometheusCollector and Zipkin HTTPCollector
httpCollector, zipErr := zipkintracer.NewHTTPCollector(zipkinHTTPEndpoint, zipkintracer.HTTPLogger(logger))
if zipErr != nil {
logrus.WithError(zipErr).Fatalln("couldn't start Zipkin trace collector")
}
collector = zipkintracer.MultiCollector{httpCollector, promCollector}
} else {
// Custom PrometheusCollector only
collector = promCollector
}
tracer, err := zipkintracer.NewTracer(zipkintracer.NewRecorder(collector, debugMode, serviceHostPort, serviceName),
ziptracer, err := zipkintracer.NewTracer(zipkintracer.NewRecorder(collector, debugMode, serviceHostPort, serviceName),
zipkintracer.ClientServerSameSpan(true),
zipkintracer.TraceID128Bit(true),
)
if err != nil {
logrus.WithError(err).Fatalln("couldn't start tracer")
}
// wrap the Zipkin tracer in a FnTracer which will also send spans to Prometheus
fntracer := NewFnTracer(ziptracer)
opentracing.SetGlobalTracer(tracer)
opentracing.SetGlobalTracer(fntracer)
logrus.WithFields(logrus.Fields{"url": zipkinHTTPEndpoint}).Info("started tracer")
}