renaming plugins -> inputs

plugins/outputs/opentsdb/opentsdb.go

@@ -0,0 +1,168 @@
+package opentsdb
+
+import (
+	"fmt"
+	"net"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/influxdb/influxdb/client/v2"
+	"github.com/influxdb/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(points []*client.Point) error {
+	if len(points) == 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 _, pt := range points {
+		for _, metric := range buildMetrics(pt, 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(ptTags map[string]string) []string {
+	tags := make([]string, len(ptTags))
+	index := 0
+	for k, v := range ptTags {
+		tags[index] = fmt.Sprintf("%s=%s", k, v)
+		index += 1
+	}
+	sort.Strings(tags)
+	return tags
+}
+
+func buildMetrics(pt *client.Point, now time.Time, prefix string) []*MetricLine {
+	ret := []*MetricLine{}
+	for fieldName, value := range pt.Fields() {
+		metric := &MetricLine{
+			Metric:    fmt.Sprintf("%s%s_%s", prefix, pt.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(pt.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() outputs.Output {
+		return &OpenTSDB{}
+	})
+}