package opentsdb import ( "fmt" "net" "sort" "strconv" "strings" "time" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/plugins/outputs" ) type OpenTSDB struct { Prefix string Host string Port int Debug bool } var sampleConfig = ` # prefix for metrics keys prefix = "my.specific.prefix." ## Telnet Mode ## # DNS name of the OpenTSDB server in telnet mode host = "opentsdb.example.com" # Port of the OpenTSDB server in telnet mode port = 4242 # Debug true - Prints OpenTSDB communication debug = false ` type MetricLine struct { Metric string Timestamp int64 Value string Tags string } func (o *OpenTSDB) Connect() error { // Test Connection to OpenTSDB Server uri := fmt.Sprintf("%s:%d", o.Host, o.Port) tcpAddr, err := net.ResolveTCPAddr("tcp", uri) if err != nil { return fmt.Errorf("OpenTSDB: TCP address cannot be resolved") } connection, err := net.DialTCP("tcp", nil, tcpAddr) if err != nil { return fmt.Errorf("OpenTSDB: Telnet connect fail") } defer connection.Close() return nil } func (o *OpenTSDB) Write(metrics []telegraf.Metric) error { if len(metrics) == 0 { return nil } now := time.Now() // Send Data with telnet / socket communication uri := fmt.Sprintf("%s:%d", o.Host, o.Port) tcpAddr, _ := net.ResolveTCPAddr("tcp", uri) connection, err := net.DialTCP("tcp", nil, tcpAddr) if err != nil { return fmt.Errorf("OpenTSDB: Telnet connect fail") } defer connection.Close() for _, m := range metrics { for _, metric := range buildMetrics(m, now, o.Prefix) { messageLine := fmt.Sprintf("put %s %v %s %s\n", metric.Metric, metric.Timestamp, metric.Value, metric.Tags) if o.Debug { fmt.Print(messageLine) } _, err := connection.Write([]byte(messageLine)) if err != nil { return fmt.Errorf("OpenTSDB: Telnet writing error %s", err.Error()) } } } return nil } func buildTags(mTags map[string]string) []string { tags := make([]string, len(mTags)) index := 0 for k, v := range mTags { tags[index] = fmt.Sprintf("%s=%s", k, v) index += 1 } sort.Strings(tags) return tags } func buildMetrics(m telegraf.Metric, now time.Time, prefix string) []*MetricLine { ret := []*MetricLine{} for fieldName, value := range m.Fields() { metric := &MetricLine{ Metric: fmt.Sprintf("%s%s_%s", prefix, m.Name(), fieldName), Timestamp: now.Unix(), } metricValue, buildError := buildValue(value) if buildError != nil { fmt.Printf("OpenTSDB: %s\n", buildError.Error()) continue } metric.Value = metricValue tagsSlice := buildTags(m.Tags()) metric.Tags = fmt.Sprint(strings.Join(tagsSlice, " ")) ret = append(ret, metric) } return ret } func buildValue(v interface{}) (string, error) { var retv string switch p := v.(type) { case int64: retv = IntToString(int64(p)) case uint64: retv = UIntToString(uint64(p)) case float64: retv = FloatToString(float64(p)) default: return retv, fmt.Errorf("unexpected type %T with value %v for OpenTSDB", v, v) } return retv, nil } func IntToString(input_num int64) string { return strconv.FormatInt(input_num, 10) } func UIntToString(input_num uint64) string { return strconv.FormatUint(input_num, 10) } func FloatToString(input_num float64) string { return strconv.FormatFloat(input_num, 'f', 6, 64) } func (o *OpenTSDB) SampleConfig() string { return sampleConfig } func (o *OpenTSDB) Description() string { return "Configuration for OpenTSDB server to send metrics to" } func (o *OpenTSDB) Close() error { return nil } func init() { outputs.Add("opentsdb", func() telegraf.Output { return &OpenTSDB{} }) }