121 lines
2.6 KiB
Go
121 lines
2.6 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/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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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 telegraf.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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acc.AddError(z.gatherServer(serverAddress, acc))
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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 telegraf.Accumulator) error {
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var zookeeper_state string
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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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// Extend connection
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c.SetDeadline(time.Now().Add(defaultTimeout))
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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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service := strings.Split(address, ":")
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if len(service) != 2 {
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return fmt.Errorf("Invalid service address: %s", address)
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}
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fields := make(map[string]interface{})
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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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if len(parts) != 3 {
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return fmt.Errorf("unexpected line in mntr response: %q", line)
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}
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measurement := strings.TrimPrefix(parts[1], "zk_")
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if measurement == "server_state" {
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zookeeper_state = parts[2]
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} else {
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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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fields[measurement] = iVal
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} else {
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fields[measurement] = sValue
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}
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}
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}
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tags := map[string]string{
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"server": service[0],
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"port": service[1],
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"state": zookeeper_state,
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}
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acc.AddFields("zookeeper", fields, tags)
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return nil
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}
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func init() {
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inputs.Add("zookeeper", func() telegraf.Input {
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return &Zookeeper{}
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})
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}
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