128 lines
2.3 KiB
Go
128 lines
2.3 KiB
Go
package powerdns
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import (
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"bufio"
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"fmt"
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"io"
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"log"
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"net"
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"strconv"
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"strings"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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type Powerdns struct {
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UnixSockets []string
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}
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var sampleConfig = `
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## An array of sockets to gather stats about.
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## Specify a path to unix socket.
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unix_sockets = ["/var/run/pdns.controlsocket"]
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`
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var defaultTimeout = 5 * time.Second
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func (p *Powerdns) SampleConfig() string {
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return sampleConfig
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}
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func (p *Powerdns) Description() string {
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return "Read metrics from one or many PowerDNS servers"
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}
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func (p *Powerdns) Gather(acc telegraf.Accumulator) error {
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if len(p.UnixSockets) == 0 {
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return p.gatherServer("/var/run/pdns.controlsocket", acc)
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}
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for _, serverSocket := range p.UnixSockets {
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if err := p.gatherServer(serverSocket, acc); err != nil {
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acc.AddError(err)
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}
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}
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return nil
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}
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func (p *Powerdns) gatherServer(address string, acc telegraf.Accumulator) error {
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conn, err := net.DialTimeout("unix", address, defaultTimeout)
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if err != nil {
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return err
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}
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defer conn.Close()
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conn.SetDeadline(time.Now().Add(defaultTimeout))
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// Read and write buffer
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rw := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
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// Send command
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if _, err := fmt.Fprint(conn, "show * \n"); err != nil {
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return nil
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}
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if err := rw.Flush(); err != nil {
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return err
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}
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// Read data
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buf := make([]byte, 0, 4096)
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tmp := make([]byte, 1024)
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for {
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n, err := rw.Read(tmp)
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if err != nil {
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if err != io.EOF {
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return err
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}
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break
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}
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buf = append(buf, tmp[:n]...)
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}
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metrics := string(buf)
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// Process data
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fields := parseResponse(metrics)
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// Add server socket as a tag
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tags := map[string]string{"server": address}
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acc.AddFields("powerdns", fields, tags)
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return nil
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}
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func parseResponse(metrics string) map[string]interface{} {
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values := make(map[string]interface{})
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s := strings.Split(metrics, ",")
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for _, metric := range s[:len(s)-1] {
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m := strings.Split(metric, "=")
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if len(m) < 2 {
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continue
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}
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i, err := strconv.ParseInt(m[1], 10, 64)
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if err != nil {
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log.Printf("E! [inputs.powerdns] error parsing integer for metric %q: %s",
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metric, err.Error())
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continue
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}
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values[m[0]] = i
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}
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return values
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}
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func init() {
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inputs.Add("powerdns", func() telegraf.Input {
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return &Powerdns{}
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})
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}
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