17574: add -pprof flag to service commands.

[arvados.git] / services / keep-balance / main.go

diff --git a/services/keep-balance/main.go b/services/keep-balance/main.go
index 93457fb827483143ac67184dcc31946571775768..90ae0695df8d96d2d603b916e44d26310ce2da3c 100644 (file)
--- a/services/keep-balance/main.go
+++ b/services/keep-balance/main.go
@@ -9,6 +9,8 @@ import (
        "flag"
        "fmt"
        "io"
+       "net/http"
+       _ "net/http/pprof"
        "os"
 
        "git.arvados.org/arvados.git/lib/config"
@@ -40,6 +42,13 @@ func runCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.W
                "update collection fields (replicas_confirmed, storage_classes_confirmed, etc.)")
        flags.Bool("version", false, "Write version information to stdout and exit 0")
        dumpFlag := flags.Bool("dump", false, "dump details for each block to stdout")
+       pprofAddr := flags.String("pprof", "", "serve Go profile data at `[addr]:port`")
+
+       if *pprofAddr != "" {
+               go func() {
+                       logrus.Println(http.ListenAndServe(*pprofAddr, nil))
+               }()
+       }
 
        loader := config.NewLoader(os.Stdin, logger)
        loader.SetupFlags(flags)