125 lines
3.0 KiB
Go
125 lines
3.0 KiB
Go
// +build linux
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package sensors
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import (
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"errors"
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"fmt"
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"os/exec"
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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/internal"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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var (
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execCommand = exec.Command // execCommand is used to mock commands in tests.
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numberRegp = regexp.MustCompile("[0-9]+")
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defaultTimeout = internal.Duration{Duration: 5 * time.Second}
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)
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type Sensors struct {
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RemoveNumbers bool `toml:"remove_numbers"`
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Timeout internal.Duration `toml:"timeout"`
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path string
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}
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func (*Sensors) Description() string {
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return "Monitor sensors, requires lm-sensors package"
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}
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func (*Sensors) SampleConfig() string {
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return `
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## Remove numbers from field names.
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## If true, a field name like 'temp1_input' will be changed to 'temp_input'.
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# remove_numbers = true
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## Timeout is the maximum amount of time that the sensors command can run.
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# timeout = "5s"
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`
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}
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func (s *Sensors) Gather(acc telegraf.Accumulator) error {
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if len(s.path) == 0 {
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return errors.New("sensors not found: verify that lm-sensors package is installed and that sensors is in your PATH")
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}
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return s.parse(acc)
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}
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// parse forks the command:
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// sensors -u -A
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// and parses the output to add it to the telegraf.Accumulator.
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func (s *Sensors) parse(acc telegraf.Accumulator) error {
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tags := map[string]string{}
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fields := map[string]interface{}{}
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chip := ""
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cmd := execCommand(s.path, "-A", "-u")
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out, err := internal.CombinedOutputTimeout(cmd, s.Timeout.Duration)
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if err != nil {
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return fmt.Errorf("failed to run command %s: %s - %s", strings.Join(cmd.Args, " "), err, string(out))
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}
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lines := strings.Split(strings.TrimSpace(string(out)), "\n")
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for _, line := range lines {
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if len(line) == 0 {
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acc.AddFields("sensors", fields, tags)
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chip = ""
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tags = map[string]string{}
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fields = map[string]interface{}{}
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continue
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}
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if len(chip) == 0 {
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chip = line
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tags["chip"] = chip
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continue
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}
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if !strings.HasPrefix(line, " ") {
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if len(tags) > 1 {
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acc.AddFields("sensors", fields, tags)
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}
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fields = map[string]interface{}{}
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tags = map[string]string{
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"chip": chip,
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"feature": strings.TrimRight(snake(line), ":"),
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}
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} else {
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splitted := strings.Split(line, ":")
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fieldName := strings.TrimSpace(splitted[0])
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if s.RemoveNumbers {
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fieldName = numberRegp.ReplaceAllString(fieldName, "")
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}
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fieldValue, err := strconv.ParseFloat(strings.TrimSpace(splitted[1]), 64)
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if err != nil {
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return err
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}
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fields[fieldName] = fieldValue
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}
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}
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acc.AddFields("sensors", fields, tags)
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return nil
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}
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// snake converts string to snake case
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func snake(input string) string {
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return strings.ToLower(strings.Replace(strings.TrimSpace(input), " ", "_", -1))
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}
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func init() {
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s := Sensors{
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RemoveNumbers: true,
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Timeout: defaultTimeout,
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}
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path, _ := exec.LookPath("sensors")
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if len(path) > 0 {
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s.path = path
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}
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inputs.Add("sensors", func() telegraf.Input {
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return &s
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})
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}
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