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cmd/chihaya: add tracing flag

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This commit is contained in:
Jimmy Zelinskie 2018-07-03 23:14:33 -04:00
parent ff15955dcc
commit 17f22e77a3
1 changed files with 17 additions and 1 deletions
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18
cmd/chihaya/main.go
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@ -6,6 +6,7 @@ import (
"os/signal"
"runtime"
"runtime/pprof"
"runtime/trace"
"strings"
"syscall"
@ -200,6 +201,19 @@ func PreRunCmdFunc(cmd *cobra.Command, args []string) error {
log.Info("enabled debug logging")
}
tracePath, err := cmd.Flags().GetString("trace")
if err != nil {
return err
}
if tracePath != "" {
f, err := os.Create(tracePath)
if err != nil {
return err
}
trace.Start(f)
log.Info("enabled tracing", log.Fields{"path": tracePath})
}
cpuProfilePath, err := cmd.Flags().GetString("cpuprofile")
if err != nil {
return err
@ -219,8 +233,9 @@ func PreRunCmdFunc(cmd *cobra.Command, args []string) error {
// PostRunCmdFunc handles clean up of any state initialized by command line
// flags.
func PostRunCmdFunc(cmd *cobra.Command, args []string) error {
// This can be called regardless because it noops when not profiling.
// These can be called regardless because it noops when not profiling.
pprof.StopCPUProfile()
trace.Stop()
return nil
}
@ -237,6 +252,7 @@ func main() {
rootCmd.Flags().String("config", "/etc/chihaya.yaml", "location of configuration file")
rootCmd.Flags().String("cpuprofile", "", "location to save a CPU profile")
rootCmd.Flags().String("trace", "", "location to save a trace")
rootCmd.Flags().Bool("debug", false, "enable debug logging")
rootCmd.Flags().Bool("json", false, "enable json logging")
if runtime.GOOS == "windows" {