233 lines
6.1 KiB
Go
233 lines
6.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package main
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import (
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"path/filepath"
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"github.com/golang/glog"
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common "github.com/ncabatoff/process-exporter"
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"github.com/ncabatoff/process-exporter/proc"
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"github.com/prometheus/client_golang/prometheus"
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)
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type exeMatcher struct {
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name string
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args []string
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}
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func (em exeMatcher) MatchAndName(nacl common.NameAndCmdline) (bool, string) {
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if len(nacl.Cmdline) == 0 {
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return false, ""
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}
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cmd := filepath.Base(nacl.Cmdline[0])
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return em.name == cmd, ""
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}
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func (n *NGINXController) setupMonitor(args []string) {
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pc, err := newProcessCollector(true, exeMatcher{"nginx", args})
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if err != nil {
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glog.Fatalf("unexpected error registering nginx collector: %v", err)
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}
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err = prometheus.Register(pc)
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if err != nil {
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glog.Warningf("unexpected error registering nginx collector: %v", err)
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}
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}
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var (
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numprocsDesc = prometheus.NewDesc(
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"nginx_num_procs",
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"number of processes",
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nil, nil)
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cpuSecsDesc = prometheus.NewDesc(
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"nginx_cpu_seconds_total",
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"Cpu usage in seconds",
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nil, nil)
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readBytesDesc = prometheus.NewDesc(
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"nginx_read_bytes_total",
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"number of bytes read",
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nil, nil)
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writeBytesDesc = prometheus.NewDesc(
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"nginx_write_bytes_total",
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"number of bytes written",
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nil, nil)
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memResidentbytesDesc = prometheus.NewDesc(
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"nginx_resident_memory_bytes",
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"number of bytes of memory in use",
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nil, nil)
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memVirtualbytesDesc = prometheus.NewDesc(
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"nginx_virtual_memory_bytes",
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"number of bytes of memory in use",
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nil, nil)
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startTimeDesc = prometheus.NewDesc(
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"nginx_oldest_start_time_seconds",
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"start time in seconds since 1970/01/01",
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nil, nil)
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activeDesc = prometheus.NewDesc(
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"nginx_active_connections",
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"total number of active connections",
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nil, nil)
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acceptedDesc = prometheus.NewDesc(
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"nginx_accepted_connections",
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"total number of accepted client connections",
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nil, nil)
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handledDesc = prometheus.NewDesc(
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"nginx_handled_connections",
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"total number of handled connections",
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nil, nil)
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requestsDesc = prometheus.NewDesc(
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"nginx_total_requests",
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"total number of client requests",
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nil, nil)
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readingDesc = prometheus.NewDesc(
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"nginx_current_reading_connections",
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"current number of connections where nginx is reading the request header",
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nil, nil)
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writingDesc = prometheus.NewDesc(
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"nginx_current_writing_connections",
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"current number of connections where nginx is writing the response back to the client",
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nil, nil)
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waitingDesc = prometheus.NewDesc(
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"nginx_current_waiting_connections",
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"current number of idle client connections waiting for a request",
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nil, nil)
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)
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type (
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scrapeRequest struct {
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results chan<- prometheus.Metric
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done chan struct{}
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}
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namedProcessCollector struct {
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scrapeChan chan scrapeRequest
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*proc.Grouper
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fs *proc.FS
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}
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)
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func newProcessCollector(
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children bool,
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n common.MatchNamer) (*namedProcessCollector, error) {
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fs, err := proc.NewFS("/proc")
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if err != nil {
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return nil, err
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}
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p := &namedProcessCollector{
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scrapeChan: make(chan scrapeRequest),
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Grouper: proc.NewGrouper(children, n),
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fs: fs,
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}
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_, err = p.Update(p.fs.AllProcs())
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if err != nil {
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return nil, err
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}
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go p.start()
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return p, nil
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}
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// Describe implements prometheus.Collector.
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func (p *namedProcessCollector) Describe(ch chan<- *prometheus.Desc) {
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ch <- cpuSecsDesc
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ch <- numprocsDesc
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ch <- readBytesDesc
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ch <- writeBytesDesc
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ch <- memResidentbytesDesc
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ch <- memVirtualbytesDesc
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ch <- startTimeDesc
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}
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// Collect implements prometheus.Collector.
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func (p *namedProcessCollector) Collect(ch chan<- prometheus.Metric) {
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req := scrapeRequest{results: ch, done: make(chan struct{})}
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p.scrapeChan <- req
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<-req.done
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}
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func (p *namedProcessCollector) start() {
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for req := range p.scrapeChan {
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ch := req.results
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p.scrape(ch)
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req.done <- struct{}{}
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}
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}
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func (p *namedProcessCollector) scrape(ch chan<- prometheus.Metric) {
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s, err := getNginxStatus()
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if err != nil {
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glog.Warningf("unexpected error obtaining nginx status info: %v", err)
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return
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}
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ch <- prometheus.MustNewConstMetric(activeDesc,
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prometheus.GaugeValue, float64(s.Active))
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ch <- prometheus.MustNewConstMetric(acceptedDesc,
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prometheus.GaugeValue, float64(s.Accepted))
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ch <- prometheus.MustNewConstMetric(handledDesc,
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prometheus.GaugeValue, float64(s.Handled))
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ch <- prometheus.MustNewConstMetric(requestsDesc,
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prometheus.GaugeValue, float64(s.Requests))
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ch <- prometheus.MustNewConstMetric(readingDesc,
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prometheus.GaugeValue, float64(s.Reading))
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ch <- prometheus.MustNewConstMetric(writingDesc,
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prometheus.GaugeValue, float64(s.Writing))
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ch <- prometheus.MustNewConstMetric(waitingDesc,
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prometheus.GaugeValue, float64(s.Waiting))
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_, err = p.Update(p.fs.AllProcs())
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if err != nil {
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glog.Warningf("unexpected error obtaining nginx process info: %v", err)
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return
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}
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for gname, gcounts := range p.Groups() {
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glog.Infof("%v", gname)
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glog.Infof("%v", gcounts)
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ch <- prometheus.MustNewConstMetric(numprocsDesc,
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prometheus.GaugeValue, float64(gcounts.Procs))
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ch <- prometheus.MustNewConstMetric(memResidentbytesDesc,
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prometheus.GaugeValue, float64(gcounts.Memresident))
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ch <- prometheus.MustNewConstMetric(memVirtualbytesDesc,
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prometheus.GaugeValue, float64(gcounts.Memvirtual))
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ch <- prometheus.MustNewConstMetric(startTimeDesc,
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prometheus.GaugeValue, float64(gcounts.OldestStartTime.Unix()))
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ch <- prometheus.MustNewConstMetric(cpuSecsDesc,
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prometheus.CounterValue, gcounts.Cpu)
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ch <- prometheus.MustNewConstMetric(readBytesDesc,
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prometheus.CounterValue, float64(gcounts.ReadBytes))
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ch <- prometheus.MustNewConstMetric(writeBytesDesc,
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prometheus.CounterValue, float64(gcounts.WriteBytes))
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}
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}
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