135 lines
2.9 KiB
Go
135 lines
2.9 KiB
Go
package postfix
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import (
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"fmt"
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"os"
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"os/exec"
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"path"
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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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const sampleConfig = `
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## Postfix queue directory. If not provided, telegraf will try to use
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## 'postconf -h queue_directory' to determine it.
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# queue_directory = "/var/spool/postfix"
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`
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const description = "Measure postfix queue statistics"
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func getQueueDirectory() (string, error) {
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qd, err := exec.Command("postconf", "-h", "queue_directory").Output()
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if err != nil {
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return "", err
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}
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return strings.TrimSpace(string(qd)), nil
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}
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func qScan(path string) (int64, int64, int64, error) {
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f, err := os.Open(path)
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if err != nil {
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return 0, 0, 0, err
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}
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finfos, err := f.Readdir(-1)
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f.Close()
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if err != nil {
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return 0, 0, 0, err
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}
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var length, size int64
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var oldest time.Time
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for _, finfo := range finfos {
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length++
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size += finfo.Size()
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ctime := statCTime(finfo.Sys())
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if ctime.IsZero() {
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continue
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}
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if oldest.IsZero() || ctime.Before(oldest) {
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oldest = ctime
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}
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}
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var age int64
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if !oldest.IsZero() {
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age = int64(time.Now().Sub(oldest) / time.Second)
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} else if len(finfos) != 0 {
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// system doesn't support ctime
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age = -1
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}
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return length, size, age, nil
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}
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type Postfix struct {
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QueueDirectory string
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}
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func (p *Postfix) Gather(acc telegraf.Accumulator) error {
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if p.QueueDirectory == "" {
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var err error
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p.QueueDirectory, err = getQueueDirectory()
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if err != nil {
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return fmt.Errorf("unable to determine queue directory: %s", err)
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}
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}
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for _, q := range []string{"active", "hold", "incoming", "maildrop"} {
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length, size, age, err := qScan(path.Join(p.QueueDirectory, q))
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if err != nil {
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acc.AddError(fmt.Errorf("error scanning queue %s: %s", q, err))
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continue
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}
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fields := map[string]interface{}{"length": length, "size": size}
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if age != -1 {
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fields["age"] = age
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}
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acc.AddFields("postfix_queue", fields, map[string]string{"queue": q})
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}
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var dLength, dSize int64
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dAge := int64(-1)
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for _, q := range []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"} {
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length, size, age, err := qScan(path.Join(p.QueueDirectory, "deferred", q))
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if err != nil {
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if os.IsNotExist(err) {
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// the directories are created on first use
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continue
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}
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acc.AddError(fmt.Errorf("error scanning queue deferred/%s: %s", q, err))
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return nil
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}
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dLength += length
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dSize += size
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if age > dAge {
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dAge = age
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}
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}
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fields := map[string]interface{}{"length": dLength, "size": dSize}
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if dAge != -1 {
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fields["age"] = dAge
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}
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acc.AddFields("postfix_queue", fields, map[string]string{"queue": "deferred"})
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return nil
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}
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func (p *Postfix) SampleConfig() string {
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return sampleConfig
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}
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func (p *Postfix) Description() string {
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return description
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}
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func init() {
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inputs.Add("postfix", func() telegraf.Input {
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return &Postfix{
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QueueDirectory: "/var/spool/postfix",
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}
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})
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}
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