/
setup.go
71 lines (61 loc) · 1.71 KB
/
setup.go
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package telemetry
import (
"context"
"fmt"
"net/http"
"time"
"github.com/mattfenwick/scaling/pkg/utils"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/sirupsen/logrus"
"go.opentelemetry.io/otel/trace"
)
func Setup(ctx context.Context, logLevel string, serviceName string, prometheusPort int, jaegerURL string) (trace.TracerProvider, error, func()) {
cleanup := func() {
logrus.Infof("noop tracing cleanup")
}
// logs
logrus.Infof("setting up logging for level %s", logLevel)
err := SetUpLogger(logLevel)
if err != nil {
return nil, err, cleanup
}
// metrics
logrus.Infof("setting up metrics for namespace %s", serviceName)
CreateMetrics(serviceName) // TODO is this really what we want/
SetupPrometheus(prometheusPort)
// traces
logrus.Infof("setting up tracing for jaeger url %s", jaegerURL)
var tp trace.TracerProvider
if jaegerURL == "" {
tp = SetUpNoopTracerProvider()
} else {
jtp, err := SetUpJaegerTracerProvider(jaegerURL, serviceName)
if err != nil {
return nil, err, cleanup
}
tp = jtp
cleanup = func() {
logrus.Infof("jaeger tracing cleanup")
timedContext, timedCancel := context.WithTimeout(ctx, time.Second*5)
defer timedCancel()
_ = jtp.Shutdown(timedContext)
}
}
return tp, nil, cleanup
}
func SetupPrometheus(port int) {
addr := fmt.Sprintf(":%d", port)
serveMux := http.NewServeMux()
serveMux.Handle("/metrics", promhttp.HandlerFor(
prometheus.DefaultGatherer,
promhttp.HandlerOpts{
// Opt into OpenMetrics to support exemplars. -- only on go 1.17
//EnableOpenMetrics: true,
Timeout: 10 * time.Second,
},
))
go func() {
utils.Die(http.ListenAndServe(addr, serveMux))
}()
}