152 lines
3.4 KiB
Go
152 lines
3.4 KiB
Go
// +build freebsd
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package zfs
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import (
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"bytes"
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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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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func (z *Zfs) gatherPoolStats(acc telegraf.Accumulator) (string, error) {
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lines, err := z.zpool()
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if err != nil {
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return "", err
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}
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pools := []string{}
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for _, line := range lines {
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col := strings.Split(line, "\t")
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pools = append(pools, col[0])
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}
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if z.PoolMetrics {
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for _, line := range lines {
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col := strings.Split(line, "\t")
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if len(col) != 8 {
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continue
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}
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tags := map[string]string{"pool": col[0], "health": col[1]}
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fields := map[string]interface{}{}
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if tags["health"] == "UNAVAIL" {
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fields["size"] = int64(0)
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} else {
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size, err := strconv.ParseInt(col[2], 10, 64)
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if err != nil {
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return "", fmt.Errorf("Error parsing size: %s", err)
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}
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fields["size"] = size
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alloc, err := strconv.ParseInt(col[3], 10, 64)
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if err != nil {
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return "", fmt.Errorf("Error parsing allocation: %s", err)
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}
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fields["allocated"] = alloc
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free, err := strconv.ParseInt(col[4], 10, 64)
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if err != nil {
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return "", fmt.Errorf("Error parsing free: %s", err)
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}
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fields["free"] = free
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frag, err := strconv.ParseInt(strings.TrimSuffix(col[5], "%"), 10, 0)
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if err != nil { // This might be - for RO devs
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frag = 0
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}
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fields["fragmentation"] = frag
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capval, err := strconv.ParseInt(col[6], 10, 0)
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if err != nil {
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return "", fmt.Errorf("Error parsing capacity: %s", err)
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}
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fields["capacity"] = capval
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dedup, err := strconv.ParseFloat(strings.TrimSuffix(col[7], "x"), 32)
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if err != nil {
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return "", fmt.Errorf("Error parsing dedupratio: %s", err)
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}
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fields["dedupratio"] = dedup
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}
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acc.AddFields("zfs_pool", fields, tags)
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}
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}
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return strings.Join(pools, "::"), nil
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}
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func (z *Zfs) Gather(acc telegraf.Accumulator) error {
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kstatMetrics := z.KstatMetrics
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if len(kstatMetrics) == 0 {
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kstatMetrics = []string{"arcstats", "zfetchstats", "vdev_cache_stats"}
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}
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tags := map[string]string{}
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poolNames, err := z.gatherPoolStats(acc)
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if err != nil {
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return err
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}
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tags["pools"] = poolNames
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fields := make(map[string]interface{})
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for _, metric := range kstatMetrics {
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stdout, err := z.sysctl(metric)
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if err != nil {
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return err
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}
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for _, line := range stdout {
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rawData := strings.Split(line, ": ")
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key := metric + "_" + strings.Split(rawData[0], ".")[4]
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value, _ := strconv.ParseInt(rawData[1], 10, 64)
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fields[key] = value
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}
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}
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acc.AddFields("zfs", fields, tags)
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return nil
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}
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func run(command string, args ...string) ([]string, error) {
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cmd := exec.Command(command, args...)
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var outbuf, errbuf bytes.Buffer
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cmd.Stdout = &outbuf
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cmd.Stderr = &errbuf
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err := cmd.Run()
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stdout := strings.TrimSpace(outbuf.String())
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stderr := strings.TrimSpace(errbuf.String())
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if _, ok := err.(*exec.ExitError); ok {
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return nil, fmt.Errorf("%s error: %s", command, stderr)
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}
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return strings.Split(stdout, "\n"), nil
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}
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func zpool() ([]string, error) {
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return run("zpool", []string{"list", "-Hp", "-o", "name,health,size,alloc,free,fragmentation,capacity,dedupratio"}...)
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}
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func sysctl(metric string) ([]string, error) {
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return run("sysctl", []string{"-q", fmt.Sprintf("kstat.zfs.misc.%s", metric)}...)
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}
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func init() {
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inputs.Add("zfs", func() telegraf.Input {
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return &Zfs{
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sysctl: sysctl,
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zpool: zpool,
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}
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})
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}
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