feat(pprof): add pyroscope profiler support

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

pprof/pprof.go

@@ -0,0 +1,38 @@
+package pprof
+
+import (
+	"context"
+	"runtime"
+
+	"github.com/grafana/pyroscope-go"
+
+	"go.linka.cloud/grpc-toolkit/logger"
+)
+
+func Init(ctx context.Context, app string, opts ...Option) {
+	if app == "" {
+		panic("application name is required to start pyroscope profiler")
+	}
+	o := defaultOptions
+	for _, v := range opts {
+		v(&o)
+	}
+	if valueOrEnv(o.address, o.addressEnv) == "" {
+		return
+	}
+	runtime.SetMutexProfileFraction(o.mutexProfileFraction)
+	runtime.SetBlockProfileRate(o.blockProfileRate)
+	log := logger.C(ctx).WithFields("service", "pyroscope")
+	log.Info("starting pyroscope profiler")
+	_, err := pyroscope.Start(pyroscope.Config{
+		ApplicationName:   app,
+		ServerAddress:     valueOrEnv(o.address, o.addressEnv),
+		BasicAuthUser:     valueOrEnv(o.user, o.userEnv),
+		BasicAuthPassword: valueOrEnv(o.password, o.passwordEnv),
+		Logger:            log,
+		ProfileTypes:      o.profiles,
+	})
+	if err != nil {
+		log.WithError(err).Error("failed to start pyroscope")
+	}
+}