Adding upstream version 1.34.4.
Signed-off-by: Daniel Baumann <daniel@debian.org>
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4963 changed files with 677545 additions and 0 deletions
323
plugins/parsers/nagios/parser.go
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323
plugins/parsers/nagios/parser.go
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package nagios
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import (
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"bufio"
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"bytes"
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"errors"
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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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"syscall"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/metric"
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"github.com/influxdata/telegraf/plugins/parsers"
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)
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// unknownExitCode is the nagios unknown status code
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// the exit code should be used if an error occurs or something unexpected happens
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const unknownExitCode = 3
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// getExitCode get the exit code from an error value which is the result
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// of running a command through exec package api.
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func getExitCode(err error) (int, error) {
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if err == nil {
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return 0, nil
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}
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var ee *exec.ExitError
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if !errors.As(err, &ee) {
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return unknownExitCode, err
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}
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ws, ok := ee.Sys().(syscall.WaitStatus)
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if !ok {
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return 0, errors.New("expected syscall.WaitStatus")
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}
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return ws.ExitStatus(), nil
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}
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// AddState adds a state derived from the runErr. Unknown state will be set as fallback.
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// If any error occurs, it is guaranteed to be added to the service output.
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// An updated slice of metrics will be returned.
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func AddState(runErr error, errMessage []byte, metrics []telegraf.Metric) []telegraf.Metric {
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state, exitErr := getExitCode(runErr)
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// This will ensure that in every error case the valid nagios state 'unknown' will be returned.
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// No error needs to be thrown because the output will contain the error information.
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// Description found at 'Plugin Return Codes' https://nagios-plugins.org/doc/guidelines.html
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if exitErr != nil || state < 0 || state > unknownExitCode {
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state = unknownExitCode
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}
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for _, m := range metrics {
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if m.Name() == "nagios_state" {
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m.AddField("state", state)
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if state == unknownExitCode {
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errorMessage := string(errMessage)
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if exitErr != nil && exitErr.Error() != "" {
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errorMessage = exitErr.Error()
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}
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value, ok := m.GetField("service_output")
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if !ok || value == "" {
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// By adding the error message as output, the metric contains all needed information to understand
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// the problem and fix it
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m.AddField("service_output", errorMessage)
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}
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}
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return metrics
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}
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}
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var ts time.Time
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if len(metrics) != 0 {
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ts = metrics[0].Time()
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} else {
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ts = time.Now().UTC()
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}
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f := map[string]interface{}{
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"state": state,
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}
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m := metric.New("nagios_state", nil, f, ts)
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return append(metrics, m)
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}
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type Parser struct {
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DefaultTags map[string]string `toml:"-"`
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Log telegraf.Logger `toml:"-"`
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metricName string
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}
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// Got from Alignak
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// https://github.com/Alignak-monitoring/alignak/blob/develop/alignak/misc/perfdata.py
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var (
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perfSplitRegExp = regexp.MustCompile(`([^=]+=\S+)`)
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nagiosRegExp = regexp.MustCompile(
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`^([^=]+)=([\d\.\-\+eE]+)([\w\/%]*);?([\d\.\-\+eE:~@]+)?;?([\d\.\-\+eE:~@]+)?;?([\d\.\-\+eE]+)?;?([\d\.\-\+eE]+)?;?\s*`,
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)
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)
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func (p *Parser) ParseLine(line string) (telegraf.Metric, error) {
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metrics, err := p.Parse([]byte(line))
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return metrics[0], err
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}
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func (p *Parser) SetDefaultTags(tags map[string]string) {
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p.DefaultTags = tags
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}
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func (p *Parser) Parse(buf []byte) ([]telegraf.Metric, error) {
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ts := time.Now().UTC()
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s := bufio.NewScanner(bytes.NewReader(buf))
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var msg bytes.Buffer
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var longmsg bytes.Buffer
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metrics := make([]telegraf.Metric, 0)
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// Scan the first line.
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if !s.Scan() && s.Err() != nil {
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return nil, s.Err()
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}
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parts := bytes.Split(s.Bytes(), []byte{'|'})
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switch len(parts) {
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case 2:
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ms, err := parsePerfData(string(parts[1]), ts)
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if err != nil {
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p.Log.Errorf("Failed to parse performance data: %s\n", err.Error())
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}
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metrics = append(metrics, ms...)
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fallthrough
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case 1:
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msg.Write(bytes.TrimSpace(parts[0]))
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default:
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return nil, errors.New("illegal output format")
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}
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// Read long output.
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for s.Scan() {
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if bytes.Contains(s.Bytes(), []byte{'|'}) {
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parts := bytes.Split(s.Bytes(), []byte{'|'})
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if longmsg.Len() != 0 {
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longmsg.WriteByte('\n')
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}
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longmsg.Write(bytes.TrimSpace(parts[0]))
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ms, err := parsePerfData(string(parts[1]), ts)
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if err != nil {
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p.Log.Errorf("Failed to parse performance data: %s\n", err.Error())
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}
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metrics = append(metrics, ms...)
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break
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}
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if longmsg.Len() != 0 {
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longmsg.WriteByte('\n')
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}
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longmsg.Write(bytes.TrimSpace(s.Bytes()))
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}
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// Parse extra performance data.
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for s.Scan() {
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ms, err := parsePerfData(s.Text(), ts)
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if err != nil {
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p.Log.Errorf("Failed to parse performance data: %s\n", err.Error())
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}
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metrics = append(metrics, ms...)
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}
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if s.Err() != nil {
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p.Log.Debugf("Unexpected io error: %s\n", s.Err())
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}
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// Create nagios state.
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fields := map[string]interface{}{
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"service_output": msg.String(),
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}
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if longmsg.Len() != 0 {
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fields["long_service_output"] = longmsg.String()
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}
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m := metric.New("nagios_state", nil, fields, ts)
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metrics = append(metrics, m)
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return metrics, nil
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}
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func parsePerfData(perfdatas string, timestamp time.Time) ([]telegraf.Metric, error) {
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metrics := make([]telegraf.Metric, 0)
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for _, unParsedPerf := range perfSplitRegExp.FindAllString(perfdatas, -1) {
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trimmedPerf := strings.TrimSpace(unParsedPerf)
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perf := nagiosRegExp.FindStringSubmatch(trimmedPerf)
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// verify at least `'label'=value[UOM];` existed
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if len(perf) < 3 {
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continue
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}
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if perf[1] == "" || perf[2] == "" {
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continue
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}
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fieldName := strings.Trim(perf[1], "'")
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tags := map[string]string{"perfdata": fieldName}
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if perf[3] != "" {
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str := perf[3]
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if str != "" {
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tags["unit"] = str
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}
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}
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fields := make(map[string]interface{})
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if perf[2] == "U" {
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return nil, errors.New("value undetermined")
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}
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f, err := strconv.ParseFloat(perf[2], 64)
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if err == nil {
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fields["value"] = f
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}
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if perf[4] != "" {
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low, high, err := parseThreshold(perf[4])
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if err == nil {
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if strings.Contains(perf[4], "@") {
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fields["warning_le"] = low
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fields["warning_ge"] = high
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} else {
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fields["warning_lt"] = low
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fields["warning_gt"] = high
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}
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}
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}
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if perf[5] != "" {
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low, high, err := parseThreshold(perf[5])
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if err == nil {
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if strings.Contains(perf[5], "@") {
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fields["critical_le"] = low
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fields["critical_ge"] = high
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} else {
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fields["critical_lt"] = low
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fields["critical_gt"] = high
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}
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}
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}
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if perf[6] != "" {
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f, err := strconv.ParseFloat(perf[6], 64)
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if err == nil {
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fields["min"] = f
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}
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}
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if perf[7] != "" {
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f, err := strconv.ParseFloat(perf[7], 64)
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if err == nil {
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fields["max"] = f
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}
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}
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// Create metric
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m := metric.New("nagios", tags, fields, timestamp)
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// Add Metric
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metrics = append(metrics, m)
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}
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return metrics, nil
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}
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// from math
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const (
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MaxFloat64 = 1.797693134862315708145274237317043567981e+308 // 2**1023 * (2**53 - 1) / 2**52
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MinFloat64 = 4.940656458412465441765687928682213723651e-324 // 1 / 2**(1023 - 1 + 52)
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)
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var ErrBadThresholdFormat = errors.New("bad threshold format")
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// Handles all cases from https://nagios-plugins.org/doc/guidelines.html#THRESHOLDFORMAT
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func parseThreshold(threshold string) (vmin, vmax float64, err error) {
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thresh := strings.Split(threshold, ":")
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switch len(thresh) {
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case 1:
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vmax, err = strconv.ParseFloat(thresh[0], 64)
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if err != nil {
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return 0, 0, ErrBadThresholdFormat
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}
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return 0, vmax, nil
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case 2:
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if thresh[0] == "~" {
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vmin = MinFloat64
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} else {
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vmin, err = strconv.ParseFloat(thresh[0], 64)
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if err != nil {
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vmin = 0
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}
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}
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if thresh[1] == "" {
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vmax = MaxFloat64
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} else {
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vmax, err = strconv.ParseFloat(thresh[1], 64)
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if err != nil {
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return 0, 0, ErrBadThresholdFormat
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}
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}
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default:
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return 0, 0, ErrBadThresholdFormat
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}
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return vmin, vmax, err
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}
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func init() {
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// Register parser
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parsers.Add("nagios",
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func(defaultMetricName string) telegraf.Parser {
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return &Parser{metricName: defaultMetricName}
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},
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)
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}
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