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util: enable golang profiling

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Add support for golang profiling.
Standard tools like go tool pprof and curl
work. example:
$ go tool pprof http://localhost:8080/debug/pprof/profile
$ go tool pprof http://localhost:8080/debug/pprof/heap
$ curl http://localhost:8080/debug/pprof/heap?debug=1

https://golang.org/pkg/net/http/pprof/ contains
more details about the pprof interface.

Fixes: #1699

Signed-off-by: Yati Padia <ypadia@redhat.com>
This commit is contained in:
Yati Padia
2021-03-25 16:44:46 +05:30
committed by mergify[bot]
parent 9aa3520c9d
commit 774e8e4042
15 changed files with 67 additions and 0 deletions
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21
internal/util/httpserver.go
View File

@ -3,7 +3,9 @@ package util
import (
"net"
"net/http"
"net/http/pprof"
"net/url"
runtime_pprof "runtime/pprof"
"strconv"
"github.com/prometheus/client_golang/prometheus/promhttp"
@ -24,3 +26,22 @@ func StartMetricsServer(c *Config) {
FatalLogMsg("failed to listen on address %v: %s", addr, err)
}
}
func addPath(name string, handler http.Handler) {
http.Handle(name, handler)
DebugLogMsg("DEBUG: registered profiling handler on /debug/pprof/%s\n", name)
}
// EnableProfiling enables golang profiling.
func EnableProfiling() {
for _, profile := range runtime_pprof.Profiles() {
name := profile.Name()
handler := pprof.Handler(name)
addPath(name, handler)
}
// static profiles as listed in net/http/pprof/pprof.go:init()
addPath("cmdline", http.HandlerFunc(pprof.Cmdline))
addPath("profile", http.HandlerFunc(pprof.Profile))
addPath("symbol", http.HandlerFunc(pprof.Symbol))
addPath("trace", http.HandlerFunc(pprof.Trace))
}