108 lines
2.2 KiB
Go
108 lines
2.2 KiB
Go
package zookeeper
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import (
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"bufio"
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"fmt"
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"net"
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"os"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/influxdb/telegraf/plugins"
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)
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// Zookeeper is a zookeeper plugin
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type Zookeeper struct {
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Servers []string
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}
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var sampleConfig = `
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# An array of address to gather stats about. Specify an ip or hostname
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# with port. ie localhost:2181, 10.0.0.1:2181, etc.
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# If no servers are specified, then localhost is used as the host.
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# If no port is specified, 2181 is used
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servers = [":2181"]
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`
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var defaultTimeout = time.Second * time.Duration(5)
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// SampleConfig returns sample configuration message
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func (z *Zookeeper) SampleConfig() string {
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return sampleConfig
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}
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// Description returns description of Zookeeper plugin
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func (z *Zookeeper) Description() string {
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return `Reads 'mntr' stats from one or many zookeeper servers`
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}
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// Gather reads stats from all configured servers accumulates stats
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func (z *Zookeeper) Gather(acc plugins.Accumulator) error {
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if len(z.Servers) == 0 {
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return nil
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}
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for _, serverAddress := range z.Servers {
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if err := z.gatherServer(serverAddress, acc); err != nil {
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return err
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}
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}
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return nil
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}
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func (z *Zookeeper) gatherServer(address string, acc plugins.Accumulator) error {
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_, _, err := net.SplitHostPort(address)
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if err != nil {
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address = address + ":2181"
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}
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c, err := net.DialTimeout("tcp", address, defaultTimeout)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return err
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}
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defer c.Close()
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fmt.Fprintf(c, "%s\n", "mntr")
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rdr := bufio.NewReader(c)
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scanner := bufio.NewScanner(rdr)
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for scanner.Scan() {
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line := scanner.Text()
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re := regexp.MustCompile(`^zk_(\w+)\s+([\w\.\-]+)`)
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parts := re.FindStringSubmatch(string(line))
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service := strings.Split(address, ":")
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if len(parts) != 3 || len(service) != 2 {
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return fmt.Errorf("unexpected line in mntr response: %q", line)
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}
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tags := map[string]string{"server": service[0], "port": service[1]}
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measurement := strings.TrimPrefix(parts[1], "zk_")
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sValue := string(parts[2])
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iVal, err := strconv.ParseInt(sValue, 10, 64)
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if err == nil {
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acc.Add(measurement, iVal, tags)
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} else {
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acc.Add(measurement, sValue, tags)
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}
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}
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return nil
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}
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func init() {
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plugins.Add("zookeeper", func() plugins.Plugin {
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return &Zookeeper{}
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})
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}
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