Exemplo n.º 1
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func (eb *Winlogbeat) Cleanup(b *beat.Beat) error {
	logp.Debug("winlogbeat", "Dumping runtime metrics...")
	expvar.Do(func(kv expvar.KeyValue) {
		logp.Debug("winlogbeat", "%s=%s", kv.Key, kv.Value.String())
	})
	return nil
}
Exemplo n.º 2
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func TestSchemaInfoQueryCache(t *testing.T) {
	db := fakesqldb.Register()
	for query, result := range getSchemaInfoTestSupportedQueries() {
		db.AddQuery(query, result)
	}

	firstQuery := "select * from test_table_01"
	secondQuery := "select * from test_table_02"
	db.AddQuery("select * from test_table_01 where 1 != 1", &sqltypes.Result{})
	db.AddQuery("select * from test_table_02 where 1 != 1", &sqltypes.Result{})

	schemaInfo := newTestSchemaInfo(10, 10*time.Second, 10*time.Second, true)
	dbaParams := sqldb.ConnParams{Engine: db.Name}
	schemaInfo.Open(&dbaParams, true)
	defer schemaInfo.Close()

	ctx := context.Background()
	logStats := newLogStats("GetPlanStats", ctx)
	schemaInfo.SetQueryCacheCap(1)
	firstPlan := schemaInfo.GetPlan(ctx, logStats, firstQuery)
	if firstPlan == nil {
		t.Fatalf("plan should not be nil")
	}
	secondPlan := schemaInfo.GetPlan(ctx, logStats, secondQuery)
	if secondPlan == nil {
		t.Fatalf("plan should not be nil")
	}
	expvar.Do(func(kv expvar.KeyValue) {
		_ = kv.Value.String()
	})
	schemaInfo.ClearQueryPlanCache()
}
Exemplo n.º 3
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// Export expvars to Cube right now. Use the provided timestamp for the
// submitted event. This function sends variables once and returns.
//
// You shouldn't need this function under normal circumstances. Use Run()
// instead.
func ExportVariablesWithTimestamp(collectionType string, putUrl string, timestamp time.Time) error {
	variables := make([]string, 0)
	expvar.Do(func(entry expvar.KeyValue) {
		variables = append(variables, fmt.Sprintf("%q: %s", entry.Key, entry.Value))
	})
	request := fmt.Sprintf(
		`[
		{
			"type": "%s",
			"time": "%s",
			"data": { %s }
		}
		]`,
		collectionType,
		timestamp.Format(time.ANSIC),
		strings.Join(variables, ","))

	response, err := http.Post(putUrl, "application/json", bytes.NewBufferString(request))
	if err != nil {
		log.Printf("Error POSTing events to Cube collector: %v", err)
		log.Printf("The request we tried to post: %v", request)
		return err
	}
	defer response.Body.Close()
	return nil
}
Exemplo n.º 4
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// By using StatsLog, you can print stats on stdout every second, which is sometimes handy to check the state
// of the server. The stats themselves are declared using the "expvar" package
// to use this function, just before starting your listeners, create a goroutine like this
// go logging.StatsLog()
func StatsLogInterval(seconds int) {

	// If we are running in debug mode, do not clog the screen
	if IsDebug() {
		log.Println("disabling logger in debug mode")
		return
	}

	log.Println("starting logger")
	info := log.New(os.Stdout, "s:", log.Ldate|log.Ltime)

	sleepTime := time.Duration(seconds) * time.Second

	for _ = range time.Tick(sleepTime) {
		var buffer bytes.Buffer
		expvar.Do(func(k expvar.KeyValue) {
			if strings.HasPrefix(k.Key, StatsPrefix) {
				buffer.WriteString(fmt.Sprintf("[%s %s] ", strings.TrimLeft(k.Key, StatsPrefix), k.Value))
				// reset stats every nseconds
				if v, ok := (k.Value).(*expvar.Int); ok {
					v.Set(0)
				}
			}
		})
		info.Println(buffer.String())
	}

}
Exemplo n.º 5
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// RegisterDebug adds handlers for /debug/vars (expvar) and /debug/pprof (net/http/pprof) support
func (this *HttpWeb) RegisterDebug(m *martini.ClassicMartini) {

	m.Get("/debug/vars", func(w http.ResponseWriter, r *http.Request) {
		// from expvar.go, since the expvarHandler isn't exported :(
		w.Header().Set("Content-Type", "application/json; charset=utf-8")
		fmt.Fprintf(w, "{\n")
		first := true
		expvar.Do(func(kv expvar.KeyValue) {
			if !first {
				fmt.Fprintf(w, ",\n")
			}
			first = false
			fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
		})
		fmt.Fprintf(w, "\n}\n")
	})

	// list all the /debug/ endpoints we want
	m.Get("/debug/pprof", pprof.Index)
	m.Get("/debug/pprof/cmdline", pprof.Cmdline)
	m.Get("/debug/pprof/profile", pprof.Profile)
	m.Get("/debug/pprof/symbol", pprof.Symbol)
	m.Post("/debug/pprof/symbol", pprof.Symbol)
	m.Get("/debug/pprof/block", pprof.Handler("block").ServeHTTP)
	m.Get("/debug/pprof/heap", pprof.Handler("heap").ServeHTTP)
	m.Get("/debug/pprof/goroutine", pprof.Handler("goroutine").ServeHTTP)
	m.Get("/debug/pprof/threadcreate", pprof.Handler("threadcreate").ServeHTTP)
}
Exemplo n.º 6
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// ExpvarHandler dumps json representation of expvars to http response.
//
// Expvars may be filtered by regexp provided via 'r' query argument.
//
// See https://golang.org/pkg/expvar/ for details.
func ExpvarHandler(ctx *fasthttp.RequestCtx) {
	expvarHandlerCalls.Add(1)

	ctx.Response.Reset()

	r, err := getExpvarRegexp(ctx)
	if err != nil {
		expvarRegexpErrors.Add(1)
		fmt.Fprintf(ctx, "Error when obtaining expvar regexp: %s", err)
		ctx.SetStatusCode(fasthttp.StatusBadRequest)
		return
	}

	fmt.Fprintf(ctx, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if r.MatchString(kv.Key) {
			if !first {
				fmt.Fprintf(ctx, ",\n")
			}
			first = false
			fmt.Fprintf(ctx, "\t%q: %s", kv.Key, kv.Value)
		}
	})
	fmt.Fprintf(ctx, "\n}\n")

	ctx.SetContentType("application/json; charset=utf-8")
}
Exemplo n.º 7
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func (daemon *SSEDaemon) Status(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	fmt.Fprintf(w, "{\"status\":\"OK\"")
	expvar.Do(func(kv expvar.KeyValue) {
		fmt.Fprintf(w, ",%q:%s", kv.Key, kv.Value)
	})
	fmt.Fprintf(w, "}")
}
Exemplo n.º 8
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// dumpMetrics is used to log metrics on shutdown.
func dumpMetrics() {
	logp.Info("Dumping runtime metrics...")
	expvar.Do(func(kv expvar.KeyValue) {
		if kv.Key != "memstats" {
			logp.Info("%s=%s", kv.Key, kv.Value.String())
		}
	})
}
Exemplo n.º 9
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// LogOnDebugLevel logs all the current metrics, if logging is on Debug level.
func LogOnDebugLevel() {
	if log.GetLevel() == log.DebugLevel {
		fields := log.Fields{}
		expvar.Do(func(kv expvar.KeyValue) {
			fields[kv.Key] = kv.Value
		})
		logger.WithFields(fields).Debug("current values of metrics")
	}
}
Exemplo n.º 10
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// Cleanup performs clean-up after Run completes.
func (bt *Metricbeat) Cleanup(b *beat.Beat) error {
	logp.Info("Dumping runtime metrics...")
	expvar.Do(func(kv expvar.KeyValue) {
		if kv.Key != "memstats" {
			logp.Info("%s=%s", kv.Key, kv.Value.String())
		}
	})
	return nil
}
Exemplo n.º 11
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// snapshotExpvars iterates through all the defined expvars, and for the vars
// that are integers it snapshots the name and value in a separate (flat) map.
func snapshotExpvars(varsMap map[string]int64) {
	expvar.Do(func(kv expvar.KeyValue) {
		switch kv.Value.(type) {
		case *expvar.Int:
			varsMap[kv.Key], _ = strconv.ParseInt(kv.Value.String(), 10, 64)
		case *expvar.Map:
			snapshotMap(varsMap, kv.Key, kv.Value.(*expvar.Map))
		}
	})
}
Exemplo n.º 12
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func printVars() {
	log.Println("expvars:")
	expvar.Do(func(kv expvar.KeyValue) {
		switch kv.Key {
		case "memstats":
			// Do nothing, this is a big output.
		default:
			log.Printf("\t%s -> %s", kv.Key, kv.Value)
		}
	})
}
Exemplo n.º 13
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// cleanup attempts to remove any files or data it may have created which should
// not be persisted.
func (eb *Winlogbeat) cleanup(b *beat.Beat) {
	logp.Info("Dumping runtime metrics...")
	expvar.Do(func(kv expvar.KeyValue) {
		logf := logp.Info
		if kv.Key == "memstats" {
			logf = memstatsf
		}

		logf("%s=%s", kv.Key, kv.Value.String())
	})
}
Exemplo n.º 14
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// serveExpvar serves registered expvar information over HTTP.
func serveExpvar(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(w, ",\n")
		}
		first = false
		fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprintf(w, "\n}\n")
}
Exemplo n.º 15
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func writeMetrics(w io.Writer) {
	fmt.Fprintf(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(w, ",\n")
		}
		first = false
		fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprintf(w, "\n}\n")
}
Exemplo n.º 16
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func do(f func(expvar.KeyValue)) {
	expvar.Do(func(kv expvar.KeyValue) {
		switch kv.Key {
		case "cmdline",
			"memstats":
			return
		}
		if _, ok := kv.Value.(*expvar.Int); !ok {
			return
		}
		f(kv)
	})
}
Exemplo n.º 17
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func writeMetrics(w io.Writer) {
	numGoroutines.Set(int64(runtime.NumGoroutine()))
	fmt.Fprint(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprint(w, ",\n")
		}
		first = false
		fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprint(w, "\n}\n")
}
Exemplo n.º 18
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// LogOnDebugLevel logs all the current metrics, if logging is on Debug level.
func LogOnDebugLevel() {
	if !*config.Metrics.Enabled {
		log.Debug("metrics: not enabled")
		return
	}
	if log.GetLevel() == log.DebugLevel {
		fields := log.Fields{}
		expvar.Do(func(kv expvar.KeyValue) {
			fields[kv.Key] = kv.Value
		})
		log.WithFields(fields).Debug("metrics: current values")
	}
}
Exemplo n.º 19
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// serveExpvar serves registered expvar information over HTTP.
func serveExpvar(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	fmt.Fprintf(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(w, ",\n")
		}
		first = false
		fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprintf(w, "\n}\n")
}
Exemplo n.º 20
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func TestSchemaInfoExportVars(t *testing.T) {
	db := fakesqldb.Register()
	for query, result := range getSchemaInfoTestSupportedQueries() {
		db.AddQuery(query, result)
	}
	schemaInfo := newTestSchemaInfo(10, 1*time.Second, 1*time.Second, true)
	dbaParams := sqldb.ConnParams{Engine: db.Name}
	schemaInfo.Open(&dbaParams, true)
	defer schemaInfo.Close()
	expvar.Do(func(kv expvar.KeyValue) {
		_ = kv.Value.String()
	})
}
Exemplo n.º 21
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// GetByDo takes expvar map using Do method from expvar package
func GetByDo() (string, error) {
	result := "{"
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			result += ",\n"
		}
		first = false
		result += fmt.Sprintf("%q: %s", kv.Key, kv.Value)
	})
	result += "}"

	return result, nil
}
Exemplo n.º 22
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// expvarJSON returns expvars as a JSON-formatted byte slice.
func expvarJSON() []byte {
	var buf bytes.Buffer
	fmt.Fprintf(&buf, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(&buf, ",\n")
		}
		first = false
		fmt.Fprintf(&buf, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprintf(&buf, "\n}\n")
	return buf.Bytes()
}
Exemplo n.º 23
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func StatsLog() {
	for _ = range time.Tick(time.Second) {
		var buffer bytes.Buffer
		expvar.Do(func(k expvar.KeyValue) {
			if strings.HasPrefix(k.Key, "rps") {
				buffer.WriteString(fmt.Sprintf("[%s %s] ", k.Key, k.Value))
				// reset stats every second
				if v, ok := (k.Value).(*expvar.Int); ok {
					v.Set(0)
				}
			}
		})
		log.Println(buffer.String())
	}
}
Exemplo n.º 24
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// Pretty prints the latency histograms
func latencyHandler(w http.ResponseWriter, r *http.Request) {
	expvar.Do(func(kv expvar.KeyValue) {
		if strings.HasSuffix(kv.Key, "Histogram") {
			template.Must(template.New("latency").Parse(
				`<html>
					<head>
						<title>/debug/latency</title>
					</head>
					<body>
						<pre>{{.}}</pre>
					</body>
				</html>
			`)).Execute(w, template.HTML(strings.Replace(kv.Value.String(), "\\n", "<br />", -1)))
		}
	})
}
Exemplo n.º 25
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// handle expvar request.
func (s *httpServer) expvarHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	fmt.Fprintf(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(w, ",\n")
		}
		first = false
		data, err := json.Marshal(kv.Value)
		if err != nil {
			logging.Errorf("%v encoding statistics: %v\n", s.logPrefix, err)
		}
		fmt.Fprintf(w, "%q: %s", kv.Key, data)
	})
	fmt.Fprintf(w, "\n}\n")
}
Exemplo n.º 26
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func TestSchemaInfoExportVars(t *testing.T) {
	fakecacheservice.Register()
	db := fakesqldb.Register()
	for query, result := range getSchemaInfoTestSupportedQueries() {
		db.AddQuery(query, result)
	}
	schemaInfo := newTestSchemaInfo(10, 1*time.Second, 1*time.Second, true)
	appParams := sqldb.ConnParams{}
	dbaParams := sqldb.ConnParams{}
	schemaInfo.cachePool.Open()
	defer schemaInfo.cachePool.Close()
	schemaInfo.Open(&appParams, &dbaParams, []SchemaOverride{}, true)
	defer schemaInfo.Close()
	expvar.Do(func(kv expvar.KeyValue) {
		_ = kv.Value.String()
	})
}
Exemplo n.º 27
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func Handler() gin.HandlerFunc {
	return func(c *gin.Context) {
		w := c.Writer
		c.Header("Content-Type", "application/json; charset=utf-8")
		w.Write([]byte("{\n"))
		first := true
		expvar.Do(func(kv expvar.KeyValue) {
			if !first {
				w.Write([]byte(",\n"))
			}
			first = false
			fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
		})
		w.Write([]byte("\n}\n"))
		c.AbortWithStatus(200)
	}
}
Exemplo n.º 28
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// PushAll pushes all expvar stats to InfluxDB
func (backend *InfluxDBBackend) PushAll() error {
	series := []*influxClient.Series{}
	expvar.Do(func(kv expvar.KeyValue) {
		series = append(series, &influxClient.Series{
			Name: "stats",
			// TODO(aaijazi): This would be much better suited to InfluxDB v0.90's tags.
			// Ideally, we'd use some of the expvars as tags, and some as values.
			// However, as of 03/11/2015, InfluxDB v0.90 hasn't proven quite stable enough to use.
			Columns: []string{"key", "value"},
			Points: [][]interface{}{
				{kv.Key, statToValue(kv.Value)},
			},
		})
	})
	err := backend.client.WriteSeries(series)
	return err
}
Exemplo n.º 29
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func (exp *exp) expHandler(w http.ResponseWriter, r *http.Request) {
	// load our variables into expvar
	exp.syncToExpvar()

	// now just run the official expvar handler code (which is not publicly callable, so pasted inline)
	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	fmt.Fprintf(w, "{\n")
	first := true
	expvar.Do(func(kv expvar.KeyValue) {
		if !first {
			fmt.Fprintf(w, ",\n")
		}
		first = false
		fmt.Fprintf(w, "%q: %s", kv.Key, kv.Value)
	})
	fmt.Fprintf(w, "\n}\n")
}
Exemplo n.º 30
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func TestSchemaInfoQueryCache(t *testing.T) {
	fakecacheservice.Register()
	db := fakesqldb.Register()
	for query, result := range getSchemaInfoTestSupportedQueries() {
		db.AddQuery(query, result)
	}

	firstQuery := "select * from test_table_01"
	secondQuery := "select * from test_table_02"
	db.AddQuery("select * from test_table_01 where 1 != 1", &mproto.QueryResult{})
	db.AddQuery("select * from test_table_02 where 1 != 1", &mproto.QueryResult{})

	schemaInfo := newTestSchemaInfo(10, 10*time.Second, 10*time.Second, true)
	appParams := sqldb.ConnParams{}
	dbaParams := sqldb.ConnParams{}
	cachePool := newTestSchemaInfoCachePool(true, schemaInfo.queryServiceStats)
	cachePool.Open()
	defer cachePool.Close()
	schemaOverrides := getSchemaInfoTestSchemaOverride()
	// test cache type RW
	schemaInfo.Open(&appParams, &dbaParams, schemaOverrides, cachePool, true)
	defer schemaInfo.Close()

	ctx := context.Background()
	logStats := newLogStats("GetPlanStats", ctx)
	schemaInfo.SetQueryCacheSize(1)
	firstPlan := schemaInfo.GetPlan(ctx, logStats, firstQuery)
	if firstPlan == nil {
		t.Fatalf("plan should not be nil")
	}
	secondPlan := schemaInfo.GetPlan(ctx, logStats, secondQuery)
	if secondPlan == nil {
		t.Fatalf("plan should not be nil")
	}
	expvar.Do(func(kv expvar.KeyValue) {
		_ = kv.Value.String()
	})
	schemaInfo.ClearQueryPlanCache()
}