Add optional pprof http endpoint immediately on startup.

cmd/influxd/run/command.go

@@ -7,6 +7,8 @@ import (
 	"io"
 	"io/ioutil"
 	"log"
+	"net/http"
+	_ "net/http/pprof"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -92,6 +94,13 @@ func (cmd *Command) Run(args ...string) error {
 		cmd.Logger = logger.New(cmd.Stderr)
 	}
 
+	// Attempt to run pprof on :6060 before startup if debug pprof enabled.
+	if config.HTTPD.DebugPprofEnabled {
+		runtime.SetBlockProfileRate(int(1 * time.Second))
+		runtime.SetMutexProfileFraction(1)
+		go func() { http.ListenAndServe("localhost:6060", nil) }()
+	}
+
 	// Print sweet InfluxDB logo.
 	if !config.Logging.SuppressLogo && logger.IsTerminal(cmd.Stdout) {
 		fmt.Fprint(cmd.Stdout, logo)

etc/config.sample.toml

@@ -241,6 +241,10 @@
   # troubleshooting and monitoring.
   # pprof-enabled = true
 
+  # Enables a pprof endpoint that binds to localhost:6060 immediately on startup.
+  # This is only needed to debug startup issues.
+  # debug-pprof-enabled = false
+
   # Determines whether HTTPS is enabled.
   # https-enabled = false
 

services/httpd/config.go

@@ -24,6 +24,7 @@ type Config struct {
 	LogEnabled         bool   `toml:"log-enabled"`
 	WriteTracing       bool   `toml:"write-tracing"`
 	PprofEnabled       bool   `toml:"pprof-enabled"`
+	DebugPprofEnabled  bool   `toml:"debug-pprof-enabled"`
 	HTTPSEnabled       bool   `toml:"https-enabled"`
 	HTTPSCertificate   string `toml:"https-certificate"`
 	HTTPSPrivateKey    string `toml:"https-private-key"`
@@ -44,6 +45,7 @@ func NewConfig() Config {
 		BindAddress:       DefaultBindAddress,
 		LogEnabled:        true,
 		PprofEnabled:      true,
+		DebugPprofEnabled: false,
 		HTTPSEnabled:      false,
 		HTTPSCertificate:  "/etc/ssl/influxdb.pem",
 		MaxRowLimit:       0,