0c405faf87
This allows building the exporter without systemd headers, eg:
env CGO_ENABLED=0 go build -tags nosystemd
Closes #11
663 lines
24 KiB
Go
663 lines
24 KiB
Go
// Copyright 2017 Kumina, https://kumina.nl/
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"bufio"
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"bytes"
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"errors"
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"flag"
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"fmt"
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"io"
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"log"
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"net"
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"net/http"
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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/prometheus/client_golang/prometheus"
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)
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var (
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postfixUpDesc = prometheus.NewDesc(
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prometheus.BuildFQName("postfix", "", "up"),
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"Whether scraping Postfix's metrics was successful.",
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[]string{"path"}, nil)
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)
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// PostfixExporter holds the state that should be preserved by the
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// Postfix Prometheus metrics exporter across scrapes.
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type PostfixExporter struct {
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showqPath string
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logfilePath string
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journal *Journal
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// Metrics that should persist after refreshes, based on logs.
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cleanupProcesses prometheus.Counter
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cleanupRejects prometheus.Counter
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lmtpDelays *prometheus.HistogramVec
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pipeDelays *prometheus.HistogramVec
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qmgrInsertsNrcpt prometheus.Histogram
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qmgrInsertsSize prometheus.Histogram
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qmgrRemoves prometheus.Counter
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smtpDelays *prometheus.HistogramVec
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smtpTLSConnects *prometheus.CounterVec
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smtpdConnects prometheus.Counter
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smtpdDisconnects prometheus.Counter
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smtpdFCrDNSErrors prometheus.Counter
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smtpdLostConnections *prometheus.CounterVec
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smtpdProcesses *prometheus.CounterVec
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smtpdRejects *prometheus.CounterVec
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smtpdSASLAuthenticationFailures prometheus.Counter
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smtpdTLSConnects *prometheus.CounterVec
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unsupportedLogEntries *prometheus.CounterVec
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}
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// CollectShowqFromReader parses the output of Postfix's 'showq' command
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// and turns it into metrics.
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//
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// The output format of this command depends on the version of Postfix
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// used. Postfix 2.x uses a textual format, identical to the output of
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// the 'mailq' command. Postfix 3.x uses a binary format, where entries
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// are terminated using null bytes. Auto-detect the format by scanning
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// for null bytes in the first 128 bytes of output.
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func CollectShowqFromReader(file io.Reader, ch chan<- prometheus.Metric) error {
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reader := bufio.NewReader(file)
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buf, _ := reader.Peek(128)
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if bytes.IndexByte(buf, 0) >= 0 {
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return CollectBinaryShowqFromReader(reader, ch)
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}
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return CollectTextualShowqFromReader(reader, ch)
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}
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// CollectTextualShowqFromReader parses Postfix's textual showq output.
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func CollectTextualShowqFromReader(file io.Reader, ch chan<- prometheus.Metric) error {
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scanner := bufio.NewScanner(file)
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scanner.Split(bufio.ScanLines)
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// Regular expression for matching postqueue's output. Example:
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// "A07A81514 5156 Tue Feb 14 13:13:54 MAILER-DAEMON"
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messageLine := regexp.MustCompile("^[0-9A-F]+([\\*!]?) +(\\d+) (\\w{3} \\w{3} +\\d+ +\\d+:\\d{2}:\\d{2}) +")
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// Histograms tracking the messages by size and age.
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sizeHistogram := prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "postfix",
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Name: "showq_message_size_bytes",
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Help: "Size of messages in Postfix's message queue, in bytes",
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Buckets: []float64{1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9},
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},
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[]string{"queue"})
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ageHistogram := prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "postfix",
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Name: "showq_message_age_seconds",
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Help: "Age of messages in Postfix's message queue, in seconds",
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Buckets: []float64{1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8},
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},
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[]string{"queue"})
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// Initialize all queue buckets to zero.
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for _, q := range []string{"active", "hold", "other"} {
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sizeHistogram.WithLabelValues(q)
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ageHistogram.WithLabelValues(q)
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}
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now := time.Now()
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location, _ := time.LoadLocation("Local")
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for scanner.Scan() {
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matches := messageLine.FindStringSubmatch(scanner.Text())
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if matches != nil {
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// Derive the name of the message queue.
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queue := "other"
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if matches[1] == "*" {
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queue = "active"
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} else if matches[1] == "!" {
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queue = "hold"
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}
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// Parse the message size.
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size, err := strconv.ParseFloat(matches[2], 64)
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if err != nil {
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return err
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}
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// Parse the message date. Unfortunately, the
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// output contains no year number. Assume it
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// applies to the last year for which the
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// message date doesn't exceed time.Now().
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date, err := time.ParseInLocation("Mon Jan 2 15:04:05",
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matches[3], location)
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if err != nil {
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return err
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}
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date = date.AddDate(now.Year(), 0, 0)
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if date.After(now) {
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date = date.AddDate(-1, 0, 0)
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}
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sizeHistogram.WithLabelValues(queue).Observe(size)
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ageHistogram.WithLabelValues(queue).Observe(now.Sub(date).Seconds())
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}
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}
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sizeHistogram.Collect(ch)
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ageHistogram.Collect(ch)
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return scanner.Err()
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}
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// ScanNullTerminatedEntries is a splitting function for bufio.Scanner
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// to split entries by null bytes.
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func ScanNullTerminatedEntries(data []byte, atEOF bool) (advance int, token []byte, err error) {
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if i := bytes.IndexByte(data, 0); i >= 0 {
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// Valid record found.
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return i + 1, data[0:i], nil
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} else if atEOF && len(data) != 0 {
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// Data at the end of the file without a null terminator.
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return 0, nil, errors.New("Expected null byte terminator")
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} else {
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// Request more data.
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return 0, nil, nil
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}
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}
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// CollectBinaryShowqFromReader parses Postfix's binary showq format.
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func CollectBinaryShowqFromReader(file io.Reader, ch chan<- prometheus.Metric) error {
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scanner := bufio.NewScanner(file)
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scanner.Split(ScanNullTerminatedEntries)
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// Histograms tracking the messages by size and age.
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sizeHistogram := prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "postfix",
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Name: "showq_message_size_bytes",
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Help: "Size of messages in Postfix's message queue, in bytes",
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Buckets: []float64{1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9},
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},
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[]string{"queue"})
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ageHistogram := prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "postfix",
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Name: "showq_message_age_seconds",
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Help: "Age of messages in Postfix's message queue, in seconds",
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Buckets: []float64{1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8},
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},
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[]string{"queue"})
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// Initialize all queue buckets to zero.
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for _, q := range []string{"active", "deferred", "hold", "incoming", "maildrop"} {
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sizeHistogram.WithLabelValues(q)
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ageHistogram.WithLabelValues(q)
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}
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now := float64(time.Now().UnixNano()) / 1e9
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queue := "unknown"
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for scanner.Scan() {
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// Parse a key/value entry.
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key := scanner.Text()
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if len(key) == 0 {
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// Empty key means a record separator.
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queue = "unknown"
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continue
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}
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if !scanner.Scan() {
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return fmt.Errorf("key %q does not have a value", key)
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}
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value := scanner.Text()
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if key == "queue_name" {
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// The name of the message queue.
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queue = value
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} else if key == "size" {
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// Message size in bytes.
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size, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return err
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}
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sizeHistogram.WithLabelValues(queue).Observe(size)
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} else if key == "time" {
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// Message time as a UNIX timestamp.
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time, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return err
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}
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ageHistogram.WithLabelValues(queue).Observe(now - time)
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}
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}
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sizeHistogram.Collect(ch)
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ageHistogram.Collect(ch)
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return scanner.Err()
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}
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// CollectShowqFromFile collects Postfix queue statistics from a file.
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func CollectShowqFromFile(path string, ch chan<- prometheus.Metric) error {
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fd, err := os.Open(path)
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if err != nil {
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return err
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}
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defer fd.Close()
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return CollectShowqFromReader(fd, ch)
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}
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// CollectShowqFromSocket collects Postfix queue statistics from a socket.
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func CollectShowqFromSocket(path string, ch chan<- prometheus.Metric) error {
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fd, err := net.Dial("unix", path)
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if err != nil {
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return err
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}
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defer fd.Close()
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return CollectShowqFromReader(fd, ch)
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}
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// Patterns for parsing log messages.
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var (
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logLine = regexp.MustCompile(" ?postfix/(\\w+)\\[\\d+\\]: (.*)")
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lmtpPipeSMTPLine = regexp.MustCompile(", relay=(\\S+), .*, delays=([0-9\\.]+)/([0-9\\.]+)/([0-9\\.]+)/([0-9\\.]+), ")
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qmgrInsertLine = regexp.MustCompile(":.*, size=(\\d+), nrcpt=(\\d+) ")
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smtpTLSLine = regexp.MustCompile("^(\\S+) TLS connection established to \\S+: (\\S+) with cipher (\\S+) \\((\\d+)/(\\d+) bits\\)$")
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smtpdFCrDNSErrorsLine = regexp.MustCompile("^warning: hostname \\S+ does not resolve to address ")
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smtpdProcessesSASLLine = regexp.MustCompile(": client=.*, sasl_username=(\\S+)")
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smtpdRejectsLine = regexp.MustCompile("^NOQUEUE: reject: RCPT from \\S+: ([0-9]+) ")
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smtpdLostConnectionLine = regexp.MustCompile("^lost connection after (\\w+) from ")
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smtpdSASLAuthenticationFailuresLine = regexp.MustCompile("^warning: \\S+: SASL \\S+ authentication failed: ")
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smtpdTLSLine = regexp.MustCompile("^(\\S+) TLS connection established from \\S+: (\\S+) with cipher (\\S+) \\((\\d+)/(\\d+) bits\\)$")
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)
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// CollectFromLogline collects metrict from a Postfix log line.
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func (e *PostfixExporter) CollectFromLogline(line string) {
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// Strip off timestamp, hostname, etc.
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if logMatches := logLine.FindStringSubmatch(line); logMatches != nil {
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// Group patterns to check by Postfix service.
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if logMatches[1] == "cleanup" {
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if strings.Contains(logMatches[2], ": message-id=<") {
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e.cleanupProcesses.Inc()
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} else if strings.Contains(logMatches[2], ": reject: ") {
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e.cleanupRejects.Inc()
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else if logMatches[1] == "lmtp" {
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if lmtpMatches := lmtpPipeSMTPLine.FindStringSubmatch(logMatches[2]); lmtpMatches != nil {
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pdelay, _ := strconv.ParseFloat(lmtpMatches[2], 64)
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e.lmtpDelays.WithLabelValues("before_queue_manager").Observe(pdelay)
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adelay, _ := strconv.ParseFloat(lmtpMatches[3], 64)
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e.lmtpDelays.WithLabelValues("queue_manager").Observe(adelay)
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sdelay, _ := strconv.ParseFloat(lmtpMatches[4], 64)
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e.lmtpDelays.WithLabelValues("connection_setup").Observe(sdelay)
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xdelay, _ := strconv.ParseFloat(lmtpMatches[5], 64)
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e.lmtpDelays.WithLabelValues("transmission").Observe(xdelay)
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else if logMatches[1] == "pipe" {
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if pipeMatches := lmtpPipeSMTPLine.FindStringSubmatch(logMatches[2]); pipeMatches != nil {
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pdelay, _ := strconv.ParseFloat(pipeMatches[2], 64)
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e.pipeDelays.WithLabelValues(pipeMatches[1], "before_queue_manager").Observe(pdelay)
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adelay, _ := strconv.ParseFloat(pipeMatches[3], 64)
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e.pipeDelays.WithLabelValues(pipeMatches[1], "queue_manager").Observe(adelay)
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sdelay, _ := strconv.ParseFloat(pipeMatches[4], 64)
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e.pipeDelays.WithLabelValues(pipeMatches[1], "connection_setup").Observe(sdelay)
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xdelay, _ := strconv.ParseFloat(pipeMatches[5], 64)
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e.pipeDelays.WithLabelValues(pipeMatches[1], "transmission").Observe(xdelay)
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else if logMatches[1] == "qmgr" {
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if qmgrInsertMatches := qmgrInsertLine.FindStringSubmatch(logMatches[2]); qmgrInsertMatches != nil {
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size, _ := strconv.ParseFloat(qmgrInsertMatches[1], 64)
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e.qmgrInsertsSize.Observe(size)
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nrcpt, _ := strconv.ParseFloat(qmgrInsertMatches[2], 64)
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e.qmgrInsertsNrcpt.Observe(nrcpt)
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} else if strings.HasSuffix(logMatches[2], ": removed") {
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e.qmgrRemoves.Inc()
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else if logMatches[1] == "smtp" {
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if smtpMatches := lmtpPipeSMTPLine.FindStringSubmatch(logMatches[2]); smtpMatches != nil {
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pdelay, _ := strconv.ParseFloat(smtpMatches[2], 64)
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e.smtpDelays.WithLabelValues("before_queue_manager").Observe(pdelay)
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adelay, _ := strconv.ParseFloat(smtpMatches[3], 64)
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e.smtpDelays.WithLabelValues("queue_manager").Observe(adelay)
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sdelay, _ := strconv.ParseFloat(smtpMatches[4], 64)
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e.smtpDelays.WithLabelValues("connection_setup").Observe(sdelay)
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xdelay, _ := strconv.ParseFloat(smtpMatches[5], 64)
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e.smtpDelays.WithLabelValues("transmission").Observe(xdelay)
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} else if smtpTLSMatches := smtpTLSLine.FindStringSubmatch(logMatches[2]); smtpTLSMatches != nil {
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e.smtpTLSConnects.WithLabelValues(smtpTLSMatches[1:]...).Inc()
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else if logMatches[1] == "smtpd" {
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if strings.HasPrefix(logMatches[2], "connect from ") {
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e.smtpdConnects.Inc()
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} else if strings.HasPrefix(logMatches[2], "disconnect from ") {
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e.smtpdDisconnects.Inc()
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} else if smtpdFCrDNSErrorsLine.MatchString(logMatches[2]) {
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e.smtpdFCrDNSErrors.Inc()
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} else if smtpdLostConnectionMatches := smtpdLostConnectionLine.FindStringSubmatch(logMatches[2]); smtpdLostConnectionMatches != nil {
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e.smtpdLostConnections.WithLabelValues(smtpdLostConnectionMatches[1]).Inc()
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} else if smtpdProcessesSASLMatches := smtpdProcessesSASLLine.FindStringSubmatch(logMatches[2]); smtpdProcessesSASLMatches != nil {
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e.smtpdProcesses.WithLabelValues(smtpdProcessesSASLMatches[1]).Inc()
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} else if strings.Contains(logMatches[2], ": client=") {
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e.smtpdProcesses.WithLabelValues("").Inc()
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} else if smtpdRejectsMatches := smtpdRejectsLine.FindStringSubmatch(logMatches[2]); smtpdRejectsMatches != nil {
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e.smtpdRejects.WithLabelValues(smtpdRejectsMatches[1]).Inc()
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} else if smtpdSASLAuthenticationFailuresLine.MatchString(logMatches[2]) {
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e.smtpdSASLAuthenticationFailures.Inc()
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} else if smtpdTLSMatches := smtpdTLSLine.FindStringSubmatch(logMatches[2]); smtpdTLSMatches != nil {
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e.smtpdTLSConnects.WithLabelValues(smtpdTLSMatches[1:]...).Inc()
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} else {
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else {
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// Unknown Postfix service.
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e.unsupportedLogEntries.WithLabelValues(logMatches[1]).Inc()
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}
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} else {
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// Unknown log entry format.
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e.unsupportedLogEntries.WithLabelValues("").Inc()
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}
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}
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// CollectLogfileFromReader collects metrics from a Postfix logfile,
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// using a reader object.
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func (e *PostfixExporter) CollectLogfileFromReader(file io.Reader) error {
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scanner := bufio.NewScanner(file)
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scanner.Split(bufio.ScanLines)
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for scanner.Scan() {
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e.CollectFromLogline(scanner.Text())
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}
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return scanner.Err()
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}
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// CollectLogfileFromFile Collects entries from a Postfix log file and
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// truncates it. Truncation is performed to ensure that the next
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// iteration doesn't end up processing the same log entry twice.
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func (e *PostfixExporter) CollectLogfileFromFile(path string) error {
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fd, err := os.OpenFile(path, os.O_RDWR, 0)
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if err != nil {
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return err
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}
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defer fd.Close()
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err = e.CollectLogfileFromReader(fd)
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if err != nil {
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return err
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}
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return fd.Truncate(0)
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}
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// NewPostfixExporter creates a new Postfix exporter instance.
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func NewPostfixExporter(showqPath string, logfilePath string, journal *Journal) (*PostfixExporter, error) {
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return &PostfixExporter{
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showqPath: showqPath,
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logfilePath: logfilePath,
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journal: journal,
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cleanupProcesses: prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "postfix",
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Name: "cleanup_messages_processed_total",
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Help: "Total number of messages processed by cleanup.",
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}),
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cleanupRejects: prometheus.NewCounter(prometheus.CounterOpts{
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Namespace: "postfix",
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Name: "cleanup_messages_rejected_total",
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Help: "Total number of messages rejected by cleanup.",
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}),
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lmtpDelays: prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "postfix",
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Name: "lmtp_delivery_delay_seconds",
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Help: "LMTP message processing time in seconds.",
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|
Buckets: []float64{1e-3, 1e-2, 1e-1, 1e0, 1e1, 1e2, 1e3},
|
|
},
|
|
[]string{"stage"}),
|
|
pipeDelays: prometheus.NewHistogramVec(
|
|
prometheus.HistogramOpts{
|
|
Namespace: "postfix",
|
|
Name: "pipe_delivery_delay_seconds",
|
|
Help: "Pipe message processing time in seconds.",
|
|
Buckets: []float64{1e-3, 1e-2, 1e-1, 1e0, 1e1, 1e2, 1e3},
|
|
},
|
|
[]string{"relay", "stage"}),
|
|
qmgrInsertsNrcpt: prometheus.NewHistogram(prometheus.HistogramOpts{
|
|
Namespace: "postfix",
|
|
Name: "qmgr_messages_inserted_receipients",
|
|
Help: "Number of receipients per message inserted into the mail queues.",
|
|
Buckets: []float64{1, 2, 4, 8, 16, 32, 64, 128},
|
|
}),
|
|
qmgrInsertsSize: prometheus.NewHistogram(prometheus.HistogramOpts{
|
|
Namespace: "postfix",
|
|
Name: "qmgr_messages_inserted_size_bytes",
|
|
Help: "Size of messages inserted into the mail queues in bytes.",
|
|
Buckets: []float64{1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9},
|
|
}),
|
|
qmgrRemoves: prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "qmgr_messages_removed_total",
|
|
Help: "Total number of messages removed from mail queues.",
|
|
}),
|
|
smtpDelays: prometheus.NewHistogramVec(
|
|
prometheus.HistogramOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtp_delivery_delay_seconds",
|
|
Help: "SMTP message processing time in seconds.",
|
|
Buckets: []float64{1e-3, 1e-2, 1e-1, 1e0, 1e1, 1e2, 1e3},
|
|
},
|
|
[]string{"stage"}),
|
|
smtpTLSConnects: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtp_tls_connections_total",
|
|
Help: "Total number of outgoing TLS connections.",
|
|
},
|
|
[]string{"trust", "protocol", "cipher", "secret_bits", "algorithm_bits"}),
|
|
smtpdConnects: prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_connects_total",
|
|
Help: "Total number of incoming connections.",
|
|
}),
|
|
smtpdDisconnects: prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_disconnects_total",
|
|
Help: "Total number of incoming disconnections.",
|
|
}),
|
|
smtpdFCrDNSErrors: prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_forward_confirmed_reverse_dns_errors_total",
|
|
Help: "Total number of connections for which forward-confirmed DNS cannot be resolved.",
|
|
}),
|
|
smtpdLostConnections: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_connections_lost_total",
|
|
Help: "Total number of connections lost.",
|
|
},
|
|
[]string{"after_stage"}),
|
|
smtpdProcesses: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_messages_processed_total",
|
|
Help: "Total number of messages processed.",
|
|
},
|
|
[]string{"sasl_username"}),
|
|
smtpdRejects: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_messages_rejected_total",
|
|
Help: "Total number of NOQUEUE rejects.",
|
|
},
|
|
[]string{"code"}),
|
|
smtpdSASLAuthenticationFailures: prometheus.NewCounter(prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_sasl_authentication_failures_total",
|
|
Help: "Total number of SASL authentication failures.",
|
|
}),
|
|
smtpdTLSConnects: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "smtpd_tls_connections_total",
|
|
Help: "Total number of incoming TLS connections.",
|
|
},
|
|
[]string{"trust", "protocol", "cipher", "secret_bits", "algorithm_bits"}),
|
|
unsupportedLogEntries: prometheus.NewCounterVec(
|
|
prometheus.CounterOpts{
|
|
Namespace: "postfix",
|
|
Name: "unsupported_log_entries_total",
|
|
Help: "Log entries that could not be processed.",
|
|
},
|
|
[]string{"service"}),
|
|
}, nil
|
|
}
|
|
|
|
// Describe the Prometheus metrics that are going to be exported.
|
|
func (e *PostfixExporter) Describe(ch chan<- *prometheus.Desc) {
|
|
ch <- postfixUpDesc
|
|
|
|
ch <- e.cleanupProcesses.Desc()
|
|
ch <- e.cleanupRejects.Desc()
|
|
e.lmtpDelays.Describe(ch)
|
|
e.pipeDelays.Describe(ch)
|
|
ch <- e.qmgrInsertsNrcpt.Desc()
|
|
ch <- e.qmgrInsertsSize.Desc()
|
|
ch <- e.qmgrRemoves.Desc()
|
|
e.smtpDelays.Describe(ch)
|
|
e.smtpTLSConnects.Describe(ch)
|
|
ch <- e.smtpdConnects.Desc()
|
|
ch <- e.smtpdDisconnects.Desc()
|
|
ch <- e.smtpdFCrDNSErrors.Desc()
|
|
e.smtpdLostConnections.Describe(ch)
|
|
e.smtpdProcesses.Describe(ch)
|
|
e.smtpdRejects.Describe(ch)
|
|
ch <- e.smtpdSASLAuthenticationFailures.Desc()
|
|
e.smtpdTLSConnects.Describe(ch)
|
|
e.unsupportedLogEntries.Describe(ch)
|
|
}
|
|
|
|
// Collect metrics from Postfix's showq socket and its log file.
|
|
func (e *PostfixExporter) Collect(ch chan<- prometheus.Metric) {
|
|
err := CollectShowqFromSocket(e.showqPath, ch)
|
|
if err == nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
postfixUpDesc,
|
|
prometheus.GaugeValue,
|
|
1.0,
|
|
e.showqPath)
|
|
} else {
|
|
log.Printf("Failed to scrape showq socket: %s", err)
|
|
ch <- prometheus.MustNewConstMetric(
|
|
postfixUpDesc,
|
|
prometheus.GaugeValue,
|
|
0.0,
|
|
e.showqPath)
|
|
}
|
|
|
|
var src string
|
|
if e.journal != nil {
|
|
err = e.CollectLogfileFromJournal()
|
|
src = e.journal.Path
|
|
} else {
|
|
err = e.CollectLogfileFromFile(e.logfilePath)
|
|
src = e.logfilePath
|
|
}
|
|
if err == nil {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
postfixUpDesc,
|
|
prometheus.GaugeValue,
|
|
1.0,
|
|
src)
|
|
} else {
|
|
log.Printf("Failed to scrape log: %s", err)
|
|
ch <- prometheus.MustNewConstMetric(
|
|
postfixUpDesc,
|
|
prometheus.GaugeValue,
|
|
0.0,
|
|
src)
|
|
}
|
|
|
|
ch <- e.cleanupProcesses
|
|
ch <- e.cleanupRejects
|
|
e.lmtpDelays.Collect(ch)
|
|
e.pipeDelays.Collect(ch)
|
|
ch <- e.qmgrInsertsNrcpt
|
|
ch <- e.qmgrInsertsSize
|
|
ch <- e.qmgrRemoves
|
|
e.smtpDelays.Collect(ch)
|
|
e.smtpTLSConnects.Collect(ch)
|
|
ch <- e.smtpdConnects
|
|
ch <- e.smtpdDisconnects
|
|
ch <- e.smtpdFCrDNSErrors
|
|
e.smtpdLostConnections.Collect(ch)
|
|
e.smtpdProcesses.Collect(ch)
|
|
e.smtpdRejects.Collect(ch)
|
|
ch <- e.smtpdSASLAuthenticationFailures
|
|
e.smtpdTLSConnects.Collect(ch)
|
|
e.unsupportedLogEntries.Collect(ch)
|
|
}
|
|
|
|
func main() {
|
|
var (
|
|
listenAddress = flag.String("web.listen-address", ":9154", "Address to listen on for web interface and telemetry.")
|
|
metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
|
|
postfixShowqPath = flag.String("postfix.showq_path", "/var/spool/postfix/public/showq", "Path at which Postfix places its showq socket.")
|
|
postfixLogfilePath = flag.String("postfix.logfile_path", "/var/log/postfix_exporter_input.log", "Path where Postfix writes log entries. This file will be truncated by this exporter.")
|
|
|
|
systemdEnable bool
|
|
systemdUnit, systemdSlice, systemdJournalPath string
|
|
)
|
|
systemdFlags(&systemdEnable, &systemdUnit, &systemdSlice, &systemdJournalPath)
|
|
flag.Parse()
|
|
|
|
var journal *Journal
|
|
if systemdEnable {
|
|
var err error
|
|
journal, err = NewJournal(systemdUnit, systemdSlice, systemdJournalPath)
|
|
if err != nil {
|
|
log.Fatalf("Error opening systemd journal: %s", err)
|
|
}
|
|
defer journal.Close()
|
|
}
|
|
|
|
exporter, err := NewPostfixExporter(
|
|
*postfixShowqPath,
|
|
*postfixLogfilePath,
|
|
journal,
|
|
)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
prometheus.MustRegister(exporter)
|
|
|
|
http.Handle(*metricsPath, prometheus.Handler())
|
|
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
w.Write([]byte(`
|
|
<html>
|
|
<head><title>Postfix Exporter</title></head>
|
|
<body>
|
|
<h1>Postfix Exporter</h1>
|
|
<p><a href='` + *metricsPath + `'>Metrics</a></p>
|
|
</body>
|
|
</html>`))
|
|
})
|
|
|
|
log.Print("Listening on ", *listenAddress)
|
|
log.Fatal(http.ListenAndServe(*listenAddress, nil))
|
|
}
|