/
setup.go
159 lines (145 loc) · 4.39 KB
/
setup.go
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package observations
import (
"context"
"expvar"
"net/http"
"net/http/pprof"
rpc "github.com/libp2p/go-libp2p-gorpc"
manet "github.com/multiformats/go-multiaddr/net"
"contrib.go.opencensus.io/exporter/jaeger"
"contrib.go.opencensus.io/exporter/prometheus"
ocgorpc "github.com/lanzafame/go-libp2p-ocgorpc"
prom "github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
"go.opencensus.io/plugin/ochttp"
"go.opencensus.io/stats/view"
"go.opencensus.io/trace"
"go.opencensus.io/zpages"
)
// SetupMetrics configures and starts stats tooling,
// if enabled.
func SetupMetrics(cfg *MetricsConfig) error {
if cfg.EnableStats {
logger.Infof("stats collection enabled on %s", cfg.PrometheusEndpoint)
return setupMetrics(cfg)
}
return nil
}
// JaegerTracer implements ipfscluster.Tracer.
type JaegerTracer struct {
jaeger *jaeger.Exporter
}
// SetClient no-op.
func (t *JaegerTracer) SetClient(*rpc.Client) {}
// Shutdown the tracer and flush any remaining traces.
func (t *JaegerTracer) Shutdown(context.Context) error {
// nil check for testing, where tracer may not be configured
if t != (*JaegerTracer)(nil) && t.jaeger != nil {
t.jaeger.Flush()
}
return nil
}
// SetupTracing configures and starts tracing tooling,
// if enabled.
func SetupTracing(cfg *TracingConfig) (*JaegerTracer, error) {
if !cfg.EnableTracing {
return nil, nil
}
logger.Info("tracing enabled...")
je, err := setupTracing(cfg)
if err != nil {
return nil, err
}
return &JaegerTracer{je}, nil
}
func setupMetrics(cfg *MetricsConfig) error {
// setup Prometheus
registry := prom.NewRegistry()
goCollector := collectors.NewGoCollector()
procCollector := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
registry.MustRegister(goCollector, procCollector)
pe, err := prometheus.NewExporter(prometheus.Options{
Namespace: "ipfscluster",
Registry: registry,
})
if err != nil {
return err
}
// register prometheus with opencensus
view.RegisterExporter(pe)
view.SetReportingPeriod(cfg.ReportingInterval)
// register the metrics views of interest
if err := view.Register(DefaultViews...); err != nil {
return err
}
if err := view.Register(
ochttp.ClientCompletedCount,
ochttp.ClientRoundtripLatencyDistribution,
ochttp.ClientReceivedBytesDistribution,
ochttp.ClientSentBytesDistribution,
); err != nil {
return err
}
if err := view.Register(
ochttp.ServerRequestCountView,
ochttp.ServerRequestBytesView,
ochttp.ServerResponseBytesView,
ochttp.ServerLatencyView,
ochttp.ServerRequestCountByMethod,
ochttp.ServerResponseCountByStatusCode,
); err != nil {
return err
}
if err := view.Register(ocgorpc.DefaultServerViews...); err != nil {
return err
}
_, promAddr, err := manet.DialArgs(cfg.PrometheusEndpoint)
if err != nil {
return err
}
go func() {
mux := http.NewServeMux()
zpages.Handle(mux, "/debug")
mux.Handle("/metrics", pe)
mux.Handle("/debug/vars", expvar.Handler())
mux.HandleFunc("/debug/pprof/", pprof.Index)
mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
mux.Handle("/debug/pprof/block", pprof.Handler("block"))
mux.Handle("/debug/pprof/goroutine", pprof.Handler("goroutine"))
mux.Handle("/debug/pprof/heap", pprof.Handler("heap"))
mux.Handle("/debug/pprof/mutex", pprof.Handler("mutex"))
mux.Handle("/debug/pprof/threadcreate", pprof.Handler("threadcreate"))
if err := http.ListenAndServe(promAddr, mux); err != nil {
logger.Fatalf("Failed to run Prometheus /metrics endpoint: %v", err)
}
}()
return nil
}
// setupTracing configures a OpenCensus Tracing exporter for Jaeger.
func setupTracing(cfg *TracingConfig) (*jaeger.Exporter, error) {
_, agentAddr, err := manet.DialArgs(cfg.JaegerAgentEndpoint)
if err != nil {
return nil, err
}
// setup Jaeger
je, err := jaeger.NewExporter(jaeger.Options{
AgentEndpoint: agentAddr,
Process: jaeger.Process{
ServiceName: cfg.ServiceName + "-" + cfg.ClusterPeername,
Tags: []jaeger.Tag{
jaeger.StringTag("cluster_id", cfg.ClusterID),
},
},
})
if err != nil {
return nil, err
}
// register jaeger with opencensus
trace.RegisterExporter(je)
// configure tracing
trace.ApplyConfig(trace.Config{DefaultSampler: trace.ProbabilitySampler(cfg.SamplingProb)})
return je, nil
}