pprof: integrate pprof into appsrv framework

cmd/climc/shell/pprof.go

@@ -0,0 +1,87 @@
+// Copyright 2019 Yunion
+//
+// 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 shell
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"syscall"
+
+	"yunion.io/x/pkg/util/signalutils"
+
+	"yunion.io/x/onecloud/pkg/mcclient"
+	"yunion.io/x/onecloud/pkg/mcclient/modules"
+	"yunion.io/x/onecloud/pkg/util/netutils2"
+	"yunion.io/x/onecloud/pkg/util/procutils"
+)
+
+func init() {
+	type TraceOptions struct {
+		Second  int    `help:"pprof seconds" short-token:"s"`
+		SERVICE string `help:"Service type"`
+	}
+
+	downloadToTemp := func(input io.Reader, pattern string) (string, error) {
+		tmpfile, err := ioutil.TempFile("", pattern)
+		if err != nil {
+			return "", err
+		}
+		defer tmpfile.Close()
+		if _, err := io.Copy(tmpfile, input); err != nil {
+			return "", err
+		}
+		return tmpfile.Name(), nil
+	}
+
+	pprofRun := func(s *mcclient.ClientSession, svcType, pType string, second int, args ...string) error {
+		src, err := modules.GetPProfByType(s, svcType, pType, second)
+		if err != nil {
+			return err
+		}
+		tempfile, err := downloadToTemp(src, pType)
+		if err != nil {
+			return err
+		}
+		defer func() { os.Remove(tempfile) }()
+
+		signalutils.RegisterSignal(func() {
+			os.Remove(tempfile)
+			os.Exit(0)
+		}, syscall.SIGHUP, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM)
+		signalutils.StartTrap()
+
+		cmd := procutils.NewCommand("go", "tool")
+		cmd.Args = append(cmd.Args, args...)
+		cmd.Args = append(cmd.Args, tempfile)
+		if _, err := cmd.Run(); err != nil {
+			return err
+		}
+		return nil
+	}
+
+	R(&TraceOptions{}, "pprof-trace", "pprof trace of backend service", func(s *mcclient.ClientSession, args *TraceOptions) error {
+		return pprofRun(s, args.SERVICE, "trace", args.Second, "trace")
+	})
+
+	R(&TraceOptions{}, "pprof-profile", "pprof profile of backend service", func(s *mcclient.ClientSession, args *TraceOptions) error {
+		port, err := netutils2.GetFreePort()
+		if err != nil {
+			return err
+		}
+		return pprofRun(s, args.SERVICE, "profile", args.Second, "pprof", fmt.Sprintf("-http=:%d", port))
+	})
+}