161 lines
3.4 KiB
Go
161 lines
3.4 KiB
Go
package amon
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"strings"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/plugins/outputs"
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)
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type Amon struct {
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ServerKey string
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AmonInstance string
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Timeout internal.Duration
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client *http.Client
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}
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var sampleConfig = `
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## Amon Server Key
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server_key = "my-server-key" # required.
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## Amon Instance URL
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amon_instance = "https://youramoninstance" # required
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## Connection timeout.
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# timeout = "5s"
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`
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type TimeSeries struct {
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Series []*Metric `json:"series"`
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}
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type Metric struct {
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Metric string `json:"metric"`
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Points [1]Point `json:"metrics"`
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}
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type Point [2]float64
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func (a *Amon) Connect() error {
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if a.ServerKey == "" || a.AmonInstance == "" {
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return fmt.Errorf("serverkey and amon_instance are required fields for amon output")
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}
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a.client = &http.Client{
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Transport: &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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},
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Timeout: a.Timeout.Duration,
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}
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return nil
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}
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func (a *Amon) Write(metrics []telegraf.Metric) error {
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if len(metrics) == 0 {
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return nil
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}
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ts := TimeSeries{}
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tempSeries := []*Metric{}
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metricCounter := 0
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for _, m := range metrics {
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mname := strings.Replace(m.Name(), "_", ".", -1)
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if amonPts, err := buildMetrics(m); err == nil {
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for fieldName, amonPt := range amonPts {
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metric := &Metric{
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Metric: mname + "_" + strings.Replace(fieldName, "_", ".", -1),
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}
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metric.Points[0] = amonPt
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tempSeries = append(tempSeries, metric)
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metricCounter++
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}
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} else {
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log.Printf("I! unable to build Metric for %s, skipping\n", m.Name())
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}
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}
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ts.Series = make([]*Metric, metricCounter)
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copy(ts.Series, tempSeries[0:])
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tsBytes, err := json.Marshal(ts)
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if err != nil {
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return fmt.Errorf("unable to marshal TimeSeries, %s\n", err.Error())
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}
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req, err := http.NewRequest("POST", a.authenticatedUrl(), bytes.NewBuffer(tsBytes))
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if err != nil {
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return fmt.Errorf("unable to create http.Request, %s\n", err.Error())
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}
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req.Header.Add("Content-Type", "application/json")
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resp, err := a.client.Do(req)
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if err != nil {
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return fmt.Errorf("error POSTing metrics, %s\n", err.Error())
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}
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defer resp.Body.Close()
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if resp.StatusCode < 200 || resp.StatusCode > 209 {
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return fmt.Errorf("received bad status code, %d\n", resp.StatusCode)
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}
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return nil
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}
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func (a *Amon) SampleConfig() string {
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return sampleConfig
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}
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func (a *Amon) Description() string {
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return "Configuration for Amon Server to send metrics to."
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}
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func (a *Amon) authenticatedUrl() string {
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return fmt.Sprintf("%s/api/system/%s", a.AmonInstance, a.ServerKey)
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}
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func buildMetrics(m telegraf.Metric) (map[string]Point, error) {
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ms := make(map[string]Point)
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for k, v := range m.Fields() {
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var p Point
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if err := p.setValue(v); err != nil {
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return ms, fmt.Errorf("unable to extract value from Fields, %s", err.Error())
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}
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p[0] = float64(m.Time().Unix())
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ms[k] = p
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}
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return ms, nil
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}
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func (p *Point) setValue(v interface{}) error {
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switch d := v.(type) {
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case int:
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p[1] = float64(int(d))
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case int32:
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p[1] = float64(int32(d))
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case int64:
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p[1] = float64(int64(d))
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case float32:
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p[1] = float64(d)
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case float64:
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p[1] = float64(d)
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default:
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return fmt.Errorf("undeterminable type")
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}
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return nil
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}
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func (a *Amon) Close() error {
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return nil
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}
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func init() {
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outputs.Add("amon", func() telegraf.Output {
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return &Amon{}
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})
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}
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