Added pprof tool (#2512)

This commit is contained in:
Dmitry Ulyanov 2017-03-30 04:28:43 +03:00 committed by Daniel Nelson
parent d9b34c266e
commit 807c11629f
3 changed files with 50 additions and 0 deletions

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@ -56,6 +56,7 @@ be deprecated eventually.
- [#2339](https://github.com/influxdata/telegraf/pull/2339): Increment gather_errors for all errors emitted by inputs.
- [#2071](https://github.com/influxdata/telegraf/issues/2071): Use official docker SDK.
- [#1678](https://github.com/influxdata/telegraf/pull/1678): Add AMQP consumer input plugin
- [#2512](https://github.com/influxdata/telegraf/pull/2512): Added pprof tool.
- [#2501](https://github.com/influxdata/telegraf/pull/2501): Support DEAD(X) state in system input plugin.
- [#2522](https://github.com/influxdata/telegraf/pull/2522): Add support for mongodb client certificates.
- [#1948](https://github.com/influxdata/telegraf/pull/1948): Support adding SNMP table indexes as tags.

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@ -4,6 +4,8 @@ import (
"flag"
"fmt"
"log"
"net/http"
_ "net/http/pprof" // Comment this line to disable pprof endpoint.
"os"
"os/signal"
"runtime"
@ -24,6 +26,8 @@ import (
var fDebug = flag.Bool("debug", false,
"turn on debug logging")
var pprofAddr = flag.String("pprof-addr", "",
"pprof address to listen on, not activate pprof if empty")
var fQuiet = flag.Bool("quiet", false,
"run in quiet mode")
var fTest = flag.Bool("test", false, "gather metrics, print them out, and exit")
@ -87,6 +91,7 @@ The commands & flags are:
--output-filter filter the output plugins to enable, separator is :
--usage print usage for a plugin, ie, 'telegraf --usage mysql'
--debug print metrics as they're generated to stdout
--pprof-addr pprof address to listen on, format: localhost:6060 or :6060
--quiet run in quiet mode
Examples:
@ -105,6 +110,9 @@ Examples:
# run telegraf, enabling the cpu & memory input, and influxdb output plugins
telegraf --config telegraf.conf --input-filter cpu:mem --output-filter influxdb
# run telegraf with pprof
telegraf --config telegraf.conf --pprof-addr localhost:6060
`
var stop chan struct{}
@ -267,6 +275,23 @@ func main() {
processorFilters = strings.Split(":"+strings.TrimSpace(*fProcessorFilters)+":", ":")
}
if *pprofAddr != "" {
go func() {
pprofHostPort := *pprofAddr
parts := strings.Split(pprofHostPort, ":")
if len(parts) == 2 && parts[0] == "" {
pprofHostPort = fmt.Sprintf("localhost:%s", parts[1])
}
pprofHostPort = "http://" + pprofHostPort + "/debug/pprof"
log.Printf("I! Starting pprof HTTP server at: %s", pprofHostPort)
if err := http.ListenAndServe(*pprofAddr, nil); err != nil {
log.Fatal("E! " + err.Error())
}
}()
}
if len(args) > 0 {
switch args[0] {
case "version":

24
docs/PROFILING.md Normal file
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@ -0,0 +1,24 @@
# Telegraf profiling
Telegraf uses the standard package `net/http/pprof`. This package serves via its HTTP server runtime profiling data in the format expected by the pprof visualization tool.
By default, the profiling is turned off.
To enable profiling you need to specify address to config parameter `pprof-addr`, for example:
```
telegraf --config telegraf.conf --pprof-addr localhost:6060
```
There are several paths to get different profiling information:
To look at the heap profile:
`go tool pprof http://localhost:6060/debug/pprof/heap`
or to look at a 30-second CPU profile:
`go tool pprof http://localhost:6060/debug/pprof/profile?seconds=30`
To view all available profiles, open `http://localhost:6060/debug/pprof/` in your browser.