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Add pprof and create admin endpoint (#1315)
Signed-off-by: Konrad Galuszka <konrad.galuszka.ctr@sabre.com>
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Konrad Galuszka
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| // Copyright (c) 2019 The Jaeger Authors. | ||
| // Copyright (c) 2017 Uber Technologies, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package adminendpoint | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "net/http" | ||
| "net/http/pprof" | ||
| "strconv" | ||
|
|
||
| "go.uber.org/zap" | ||
|
|
||
| hc "github.com/jaegertracing/jaeger/pkg/adminendpoint/healthcheck" | ||
| "github.com/jaegertracing/jaeger/pkg/version" | ||
| ) | ||
|
|
||
| // AdminEndpoint provides an endpoint that returns the healthcheck or profiling tool | ||
| type AdminEndpoint struct { | ||
| logger *zap.Logger | ||
| server *http.Server | ||
| healthcheck *hc.HealthCheck | ||
| } | ||
|
|
||
| // Option is a functional option for passing parameters to New() | ||
| type Option func(endpoint *AdminEndpoint) | ||
|
|
||
| // Logger creates an option to set the logger. If not specified, Nop logger is used. | ||
| func Logger(logger *zap.Logger) Option { | ||
| return func(ae *AdminEndpoint) { | ||
| ae.logger = logger | ||
| } | ||
| } | ||
|
|
||
| // HealthCheck creates an option to set the healthcheck. Required | ||
| func HealthCheck(healthcheck *hc.HealthCheck) Option { | ||
| return func(ae *AdminEndpoint) { | ||
| ae.healthcheck = healthcheck | ||
| } | ||
| } | ||
|
|
||
| // New creates a AdminEndpoint | ||
| func New(options ...Option) *AdminEndpoint { | ||
| ae := &AdminEndpoint{} | ||
| for _, option := range options { | ||
| option(ae) | ||
| } | ||
| if ae.logger == nil { | ||
| ae.logger = zap.NewNop() | ||
| } | ||
| return ae | ||
| } | ||
|
|
||
| // Serve starts HTTP server on the specified port | ||
| func (ae *AdminEndpoint) Serve(port int) error { | ||
| portStr := ":" + strconv.Itoa(port) | ||
| l, err := net.Listen("tcp", portStr) | ||
| if err != nil { | ||
| ae.logger.Error("Admin endpoint server failed to listen", zap.Error(err)) | ||
| return err | ||
| } | ||
| ae.serveWithListener(l) | ||
| ae.logger.Info("Admin endpoint server started", zap.Int("http-port", port), zap.Stringer("health check status", ae.healthcheck.Get())) | ||
| return nil | ||
| } | ||
|
|
||
| // ServeWithListener starts server using given listener | ||
| func (ae *AdminEndpoint) serveWithListener(l net.Listener) { | ||
| ae.server = &http.Server{Handler: ae.httpHandler()} | ||
| go func() { | ||
| if err := ae.server.Serve(l); err != nil { | ||
| ae.logger.Error("failed to serve", zap.Error(err)) | ||
| ae.healthcheck.Set(hc.Broken) | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| // Close stops the HTTP server | ||
| func (ae *AdminEndpoint) Close() error { | ||
| return ae.server.Shutdown(context.Background()) | ||
| } | ||
|
|
||
| // httpHandler creates a new HTTP handler | ||
| func (ae *AdminEndpoint) httpHandler() http.Handler { | ||
| mux := http.NewServeMux() | ||
| ae.registerHealthCheckHandler(mux) | ||
| ae.registerProfilingHandler(mux) | ||
| version.RegisterHandler(mux, ae.logger) | ||
| return mux | ||
| } | ||
|
|
||
| // registerHealthCheckHandler registers | ||
| func (ae *AdminEndpoint) registerHealthCheckHandler(mux *http.ServeMux) { | ||
| mux.HandleFunc("/", ae.healthcheck.GetHandlerFunc()) | ||
| } | ||
|
|
||
| // registerProfilingHandler adds pprof endpoints | ||
| func (ae *AdminEndpoint) registerProfilingHandler(mux *http.ServeMux) { | ||
| 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/goroutine", pprof.Handler("goroutine")) | ||
| mux.Handle("/debug/pprof/heap", pprof.Handler("heap")) | ||
| mux.Handle("/debug/pprof/threadcreate", pprof.Handler("threadcreate")) | ||
| mux.Handle("/debug/pprof/block", pprof.Handler("block")) | ||
| } |
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