157 lines
3.1 KiB
Go
157 lines
3.1 KiB
Go
package riemann_legacy
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import (
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"fmt"
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"log"
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"os"
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"sort"
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"strings"
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"github.com/amir/raidman"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/outputs"
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)
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const deprecationMsg = "E! Error: this Riemann output plugin will be deprecated in a future release, see https://github.com/influxdata/telegraf/issues/1878 for more details & discussion."
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type Riemann struct {
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URL string
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Transport string
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Separator string
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client *raidman.Client
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}
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var sampleConfig = `
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## URL of server
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url = "localhost:5555"
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## transport protocol to use either tcp or udp
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transport = "tcp"
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## separator to use between input name and field name in Riemann service name
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separator = " "
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`
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func (r *Riemann) Connect() error {
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log.Printf(deprecationMsg)
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c, err := raidman.Dial(r.Transport, r.URL)
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if err != nil {
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r.client = nil
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return err
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}
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r.client = c
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return nil
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}
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func (r *Riemann) Close() error {
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if r.client == nil {
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return nil
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}
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r.client.Close()
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r.client = nil
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return nil
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}
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func (r *Riemann) SampleConfig() string {
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return sampleConfig
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}
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func (r *Riemann) Description() string {
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return "Configuration for the Riemann server to send metrics to"
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}
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func (r *Riemann) Write(metrics []telegraf.Metric) error {
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log.Printf(deprecationMsg)
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if len(metrics) == 0 {
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return nil
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}
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if r.client == nil {
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err := r.Connect()
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if err != nil {
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return fmt.Errorf("FAILED to (re)connect to Riemann. Error: %s\n", err)
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}
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}
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var events []*raidman.Event
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for _, p := range metrics {
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evs := buildEvents(p, r.Separator)
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for _, ev := range evs {
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events = append(events, ev)
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}
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}
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var senderr = r.client.SendMulti(events)
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if senderr != nil {
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r.Close() // always retuns nil
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return fmt.Errorf("FAILED to send riemann message (will try to reconnect). Error: %s\n",
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senderr)
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}
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return nil
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}
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func buildEvents(p telegraf.Metric, s string) []*raidman.Event {
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events := []*raidman.Event{}
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for fieldName, value := range p.Fields() {
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host, ok := p.Tags()["host"]
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if !ok {
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hostname, err := os.Hostname()
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if err != nil {
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host = "unknown"
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} else {
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host = hostname
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}
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}
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event := &raidman.Event{
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Host: host,
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Service: serviceName(s, p.Name(), p.Tags(), fieldName),
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}
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switch value.(type) {
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case string:
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event.State = value.(string)
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default:
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event.Metric = value
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}
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events = append(events, event)
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}
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return events
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}
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func serviceName(s string, n string, t map[string]string, f string) string {
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serviceStrings := []string{}
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serviceStrings = append(serviceStrings, n)
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// we'll skip the 'host' tag
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tagStrings := []string{}
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tagNames := []string{}
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for tagName := range t {
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tagNames = append(tagNames, tagName)
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}
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sort.Strings(tagNames)
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for _, tagName := range tagNames {
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if tagName != "host" {
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tagStrings = append(tagStrings, t[tagName])
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}
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}
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var tagString string = strings.Join(tagStrings, s)
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if tagString != "" {
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serviceStrings = append(serviceStrings, tagString)
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}
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serviceStrings = append(serviceStrings, f)
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return strings.Join(serviceStrings, s)
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}
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func init() {
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outputs.Add("riemann_legacy", func() telegraf.Output {
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return &Riemann{}
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})
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}
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