Admin module
This module is based on the Dropwizard framework for Java. One user told me about this framework and it’s cool stuff. Issue 128 talked about this feature. I added more cool features. Here are the features: healthcheck, profiling, statistics and tasks.
In v2.x, we plit toolbox into two pars, admin and task.
How to install
go get github.com/beego/beego/v2/core/admin
Healthcheck
It can check the health status of your application. E.g.: To check if database is available:
type DatabaseCheck struct {
}
func (dc *DatabaseCheck) Check() error {
if dc.isConnected() {
return nil
} else {
return errors.New("can't connect database")
}
}
Then you can add it as a check item:
admin.AddHealthCheck("database",&DatabaseCheck{})
After this you can send get request to /healthcheck:
$ curl http://beego.wiki:8088/healthcheck
* deadlocks: OK
* database: OK
It will return the database status accordingly.
Profiling
Monitoring the performance of running processes is a very good way to optimize performance and to look for issues in our application. E.g.: information of GC and goroutine.
Profile provides a easy entry point for you to debug the application. It uses the ProcessInput entry function to process the requests. Here are some debugging types:
-
lookup goroutine
Print out the tasks of all goroutines which are currently running. You can easily see what all goroutines are doing.
goroutine 3 [running]: runtime/pprof.writeGoroutineStacks(0x634238, 0xc210000008, 0x62b000, 0xd200000000000000) /Users/astaxie/go/src/pkg/runtime/pprof/pprof.go:511 +0x7c runtime/pprof.writeGoroutine(0x634238, 0xc210000008, 0x2, 0xd2676410957b30fd, 0xae98) /Users/astaxie/go/src/pkg/runtime/pprof/pprof.go:500 +0x3c runtime/pprof.(*Profile).WriteTo(0x52ebe0, 0x634238, 0xc210000008, 0x2, 0x1, ...) /Users/astaxie/go/src/pkg/runtime/pprof/pprof.go:229 +0xb4 _/Users/astaxie/github/beego/toolbox.ProcessInput(0x2c89f0, 0x10, 0x634238, 0xc210000008) /Users/astaxie/github/beego/toolbox/profile.go:26 +0x256 _/Users/astaxie/github/beego/toolbox.TestProcessInput(0xc21004e090) /Users/astaxie/github/beego/toolbox/profile_test.go:9 +0x5a testing.tRunner(0xc21004e090, 0x532320) /Users/astaxie/go/src/pkg/testing/testing.go:391 +0x8b created by testing.RunTests /Users/astaxie/go/src/pkg/testing/testing.go:471 +0x8b2 goroutine 1 [chan receive]: testing.RunTests(0x315668, 0x532320, 0x4, 0x4, 0x1) /Users/astaxie/go/src/pkg/testing/testing.go:472 +0x8d5 testing.Main(0x315668, 0x532320, 0x4, 0x4, 0x537700, ...) /Users/astaxie/go/src/pkg/testing/testing.go:403 +0x84 main.main() _/Users/astaxie/github/beego/toolbox/_test/_testmain.go:53 +0x9c -
lookup heap
Print out information of current heap:
heap profile: 1: 288 [2: 296] @ heap/1048576 1: 288 [2: 296] @ # runtime.MemStats # Alloc = 275504 # TotalAlloc = 275512 # Sys = 4069608 # Lookups = 5 # Mallocs = 469 # Frees = 1 # HeapAlloc = 275504 # HeapSys = 1048576 # HeapIdle = 647168 # HeapInuse = 401408 # HeapReleased = 0 # HeapObjects = 468 # Stack = 24576 / 131072 # MSpan = 4472 / 16384 # MCache = 1504 / 16384 # BuckHashSys = 1476472 # NextGC = 342976 # PauseNs = [370712 77378 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] # NumGC = 2 # EnableGC = true # DebugGC = false -
lookup threadcreate
Print out information of threads:
threadcreate profile: total 4 1 @ 0x17f68 0x183c7 0x186a8 0x188cc 0x19ca9 0xcf41 0x139a3 0x196c0 # 0x183c7 newm+0x27 /Users/astaxie/go/src/pkg/runtime/proc.c:896 # 0x186a8 startm+0xb8 /Users/astaxie/go/src/pkg/runtime/proc.c:974 # 0x188cc handoffp+0x1ac /Users/astaxie/go/src/pkg/runtime/proc.c:992 # 0x19ca9 runtime.entersyscallblock+0x129 /Users/astaxie/go/src/pkg/runtime/proc.c:1514 # 0xcf41 runtime.notetsleepg+0x71 /Users/astaxie/go/src/pkg/runtime/lock_sema.c:253 # 0x139a3 runtime.MHeap_Scavenger+0xa3 /Users/astaxie/go/src/pkg/runtime/mheap.c:463 1 @ 0x17f68 0x183c7 0x186a8 0x188cc 0x189c3 0x1969b 0x2618b # 0x183c7 newm+0x27 /Users/astaxie/go/src/pkg/runtime/proc.c:896 # 0x186a8 startm+0xb8 /Users/astaxie/go/src/pkg/runtime/proc.c:974 # 0x188cc handoffp+0x1ac /Users/astaxie/go/src/pkg/runtime/proc.c:992 # 0x189c3 stoplockedm+0x83 /Users/astaxie/go/src/pkg/runtime/proc.c:1049 # 0x1969b runtime.gosched0+0x8b /Users/astaxie/go/src/pkg/runtime/proc.c:1382 # 0x2618b runtime.mcall+0x4b /Users/astaxie/go/src/pkg/runtime/asm_amd64.s:178 1 @ 0x17f68 0x183c7 0x170bc 0x196c0 # 0x183c7 newm+0x27 /Users/astaxie/go/src/pkg/runtime/proc.c:896 # 0x170bc runtime.main+0x3c /Users/astaxie/go/src/pkg/runtime/proc.c:191 1 @ -
lookup block
Print out information of block:
--- contention: cycles/second=2294781025 -
start cpuprof
Start recording cpuprof info into created file cpu-pid.pprof.
-
stop cpuprof
Stop recording.
-
get memprof
Start recording memprof into created file mem-pid.memprof
-
gc summary
Check GC status:
NumGC:2 Pause:54.54us Pause(Avg):170.82us Overhead:177.49% Alloc:248.97K Sys:3.88M Alloc(Rate):1.23G/s Histogram:287.09us 287.09us 287.09us
Statistics
Look at this picture, what do you think? It’s cool, right? admin module supports it.
How can I use the statistics? Add statistics like this:
admin.StatisticsMap.AddStatistics("POST", "/api/user", "&admin.user", time.Duration(2000))
admin.StatisticsMap.AddStatistics("POST", "/api/user", "&admin.user", time.Duration(120000))
admin.StatisticsMap.AddStatistics("GET", "/api/user", "&admin.user", time.Duration(13000))
admin.StatisticsMap.AddStatistics("POST", "/api/admin", "&admin.user", time.Duration(14000))
admin.StatisticsMap.AddStatistics("POST", "/api/user/astaxie", "&admin.user", time.Duration(12000))
admin.StatisticsMap.AddStatistics("POST", "/api/user/xiemengjun", "&admin.user", time.Duration(13000))
admin.StatisticsMap.AddStatistics("DELETE", "/api/user", "&admin.user", time.Duration(1400))
Get statistics information:
admin.StatisticsMap.GetMap(os.Stdout)
Here is the output:
| requestUrl | method | times | used | max used | min used | avg used |
| /api/user | POST | 2 | 122.00us | 120.00us | 2.00us | 61.00us |
| /api/user | GET | 1 | 13.00us | 13.00us | 13.00us | 13.00us |
| /api/user | DELETE | 1 | 1.40us | 1.40us | 1.40us | 1.40us |
| /api/admin | POST | 1 | 14.00us | 14.00us | 14.00us | 14.00us |
| /api/user/astaxie | POST | 1 | 12.00us | 12.00us | 12.00us | 12.00us |
| /api/user/xiemengjun | POST | 1 | 13.00us | 13.00us | 13.00us | 13.00us |