package metrics import ( "bufio" "fmt" "log" "net" "os" "strings" "time" ) var shortHostName string = "" // OpenTSDBConfig provides a container with configuration parameters for // the OpenTSDB exporter type OpenTSDBConfig struct { Addr *net.TCPAddr // Network address to connect to Registry Registry // Registry to be exported FlushInterval time.Duration // Flush interval DurationUnit time.Duration // Time conversion unit for durations Prefix string // Prefix to be prepended to metric names } // OpenTSDB is a blocking exporter function which reports metrics in r // to a TSDB server located at addr, flushing them every d duration // and prepending metric names with prefix. func OpenTSDB(r Registry, d time.Duration, prefix string, addr *net.TCPAddr) { OpenTSDBWithConfig(OpenTSDBConfig{ Addr: addr, Registry: r, FlushInterval: d, DurationUnit: time.Nanosecond, Prefix: prefix, }) } // OpenTSDBWithConfig is a blocking exporter function just like OpenTSDB, // but it takes a OpenTSDBConfig instead. func OpenTSDBWithConfig(c OpenTSDBConfig) { for range time.Tick(c.FlushInterval) { if err := openTSDB(&c); nil != err { log.Println(err) } } } func getShortHostname() string { if shortHostName == "" { host, _ := os.Hostname() if index := strings.Index(host, "."); index > 0 { shortHostName = host[:index] } else { shortHostName = host } } return shortHostName } func openTSDB(c *OpenTSDBConfig) error { shortHostname := getShortHostname() now := time.Now().Unix() du := float64(c.DurationUnit) conn, err := net.DialTCP("tcp", nil, c.Addr) if nil != err { return err } defer conn.Close() w := bufio.NewWriter(conn) c.Registry.Each(func(name string, i interface{}) { switch metric := i.(type) { case Counter: fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, metric.Count(), shortHostname) case Gauge: fmt.Fprintf(w, "put %s.%s.value %d %d host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname) case GaugeFloat64: fmt.Fprintf(w, "put %s.%s.value %d %f host=%s\n", c.Prefix, name, now, metric.Value(), shortHostname) case Histogram: h := metric.Snapshot() ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, h.Count(), shortHostname) fmt.Fprintf(w, "put %s.%s.min %d %d host=%s\n", c.Prefix, name, now, h.Min(), shortHostname) fmt.Fprintf(w, "put %s.%s.max %d %d host=%s\n", c.Prefix, name, now, h.Max(), shortHostname) fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, h.Mean(), shortHostname) fmt.Fprintf(w, "put %s.%s.std-dev %d %.2f host=%s\n", c.Prefix, name, now, h.StdDev(), shortHostname) fmt.Fprintf(w, "put %s.%s.50-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[0], shortHostname) fmt.Fprintf(w, "put %s.%s.75-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[1], shortHostname) fmt.Fprintf(w, "put %s.%s.95-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[2], shortHostname) fmt.Fprintf(w, "put %s.%s.99-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[3], shortHostname) fmt.Fprintf(w, "put %s.%s.999-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[4], shortHostname) case Meter: m := metric.Snapshot() fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, m.Count(), shortHostname) fmt.Fprintf(w, "put %s.%s.one-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate1(), shortHostname) fmt.Fprintf(w, "put %s.%s.five-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate5(), shortHostname) fmt.Fprintf(w, "put %s.%s.fifteen-minute %d %.2f host=%s\n", c.Prefix, name, now, m.Rate15(), shortHostname) fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, m.RateMean(), shortHostname) case Timer: t := metric.Snapshot() ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999}) fmt.Fprintf(w, "put %s.%s.count %d %d host=%s\n", c.Prefix, name, now, t.Count(), shortHostname) fmt.Fprintf(w, "put %s.%s.min %d %d host=%s\n", c.Prefix, name, now, t.Min()/int64(du), shortHostname) fmt.Fprintf(w, "put %s.%s.max %d %d host=%s\n", c.Prefix, name, now, t.Max()/int64(du), shortHostname) fmt.Fprintf(w, "put %s.%s.mean %d %.2f host=%s\n", c.Prefix, name, now, t.Mean()/du, shortHostname) fmt.Fprintf(w, "put %s.%s.std-dev %d %.2f host=%s\n", c.Prefix, name, now, t.StdDev()/du, shortHostname) fmt.Fprintf(w, "put %s.%s.50-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[0]/du, shortHostname) fmt.Fprintf(w, "put %s.%s.75-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[1]/du, shortHostname) fmt.Fprintf(w, "put %s.%s.95-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[2]/du, shortHostname) fmt.Fprintf(w, "put %s.%s.99-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[3]/du, shortHostname) fmt.Fprintf(w, "put %s.%s.999-percentile %d %.2f host=%s\n", c.Prefix, name, now, ps[4]/du, shortHostname) fmt.Fprintf(w, "put %s.%s.one-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate1(), shortHostname) fmt.Fprintf(w, "put %s.%s.five-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate5(), shortHostname) fmt.Fprintf(w, "put %s.%s.fifteen-minute %d %.2f host=%s\n", c.Prefix, name, now, t.Rate15(), shortHostname) fmt.Fprintf(w, "put %s.%s.mean-rate %d %.2f host=%s\n", c.Prefix, name, now, t.RateMean(), shortHostname) } w.Flush() }) return nil }