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