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Cleanup collection of prometheus metrics
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package collector | ||
|
|
||
| import ( | ||
| "github.com/golang/glog" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| var ( | ||
| activeDesc = prometheus.NewDesc( | ||
| "nginx_active_connections", | ||
| "total number of active connections", | ||
| nil, nil) | ||
|
|
||
| acceptedDesc = prometheus.NewDesc( | ||
| "nginx_accepted_connections", | ||
| "total number of accepted client connections", | ||
| nil, nil) | ||
|
|
||
| handledDesc = prometheus.NewDesc( | ||
| "nginx_handled_connections", | ||
| "total number of handled connections", | ||
| nil, nil) | ||
|
|
||
| requestsDesc = prometheus.NewDesc( | ||
| "nginx_total_requests", | ||
| "total number of client requests", | ||
| nil, nil) | ||
|
|
||
| readingDesc = prometheus.NewDesc( | ||
| "nginx_current_reading_connections", | ||
| "current number of connections where nginx is reading the request header", | ||
| nil, nil) | ||
|
|
||
| writingDesc = prometheus.NewDesc( | ||
| "nginx_current_writing_connections", | ||
| "current number of connections where nginx is writing the response back to the client", | ||
| nil, nil) | ||
|
|
||
| waitingDesc = prometheus.NewDesc( | ||
| "nginx_current_waiting_connections", | ||
| "current number of idle client connections waiting for a request", | ||
| nil, nil) | ||
| ) | ||
|
|
||
| type ( | ||
| nginxStatusCollector struct { | ||
| scrapeChan chan scrapeRequest | ||
| } | ||
| ) | ||
|
|
||
| func NewNginxStatus() (prometheus.Collector, error) { | ||
| p := nginxStatusCollector{ | ||
| scrapeChan: make(chan scrapeRequest), | ||
| } | ||
|
|
||
| go p.start() | ||
|
|
||
| return p, nil | ||
| } | ||
|
|
||
| // Describe implements prometheus.Collector. | ||
| func (p nginxStatusCollector) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- activeDesc | ||
| ch <- acceptedDesc | ||
| ch <- handledDesc | ||
| ch <- requestsDesc | ||
| ch <- readingDesc | ||
| ch <- writingDesc | ||
| ch <- waitingDesc | ||
| } | ||
|
|
||
| // Collect implements prometheus.Collector. | ||
| func (p nginxStatusCollector) Collect(ch chan<- prometheus.Metric) { | ||
| req := scrapeRequest{results: ch, done: make(chan struct{})} | ||
| p.scrapeChan <- req | ||
| <-req.done | ||
| } | ||
|
|
||
| func (p nginxStatusCollector) start() { | ||
| for req := range p.scrapeChan { | ||
| ch := req.results | ||
| p.scrape(ch) | ||
| req.done <- struct{}{} | ||
| } | ||
| } | ||
|
|
||
| func (p nginxStatusCollector) Stop() { | ||
| close(p.scrapeChan) | ||
| } | ||
|
|
||
| // nginxStatusCollector scrap the nginx status | ||
| func (p nginxStatusCollector) scrape(ch chan<- prometheus.Metric) { | ||
| s, err := getNginxStatus() | ||
| if err != nil { | ||
| glog.Warningf("unexpected error obtaining nginx status info: %v", err) | ||
| return | ||
| } | ||
|
|
||
| ch <- prometheus.MustNewConstMetric(activeDesc, | ||
| prometheus.GaugeValue, float64(s.Active)) | ||
| ch <- prometheus.MustNewConstMetric(acceptedDesc, | ||
| prometheus.GaugeValue, float64(s.Accepted)) | ||
| ch <- prometheus.MustNewConstMetric(handledDesc, | ||
| prometheus.GaugeValue, float64(s.Handled)) | ||
| ch <- prometheus.MustNewConstMetric(requestsDesc, | ||
| prometheus.GaugeValue, float64(s.Requests)) | ||
| ch <- prometheus.MustNewConstMetric(readingDesc, | ||
| prometheus.GaugeValue, float64(s.Reading)) | ||
| ch <- prometheus.MustNewConstMetric(writingDesc, | ||
| prometheus.GaugeValue, float64(s.Writing)) | ||
| ch <- prometheus.MustNewConstMetric(waitingDesc, | ||
| prometheus.GaugeValue, float64(s.Waiting)) | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package collector | ||
|
|
||
| import ( | ||
| "path/filepath" | ||
|
|
||
| "github.com/golang/glog" | ||
| common "github.com/ncabatoff/process-exporter" | ||
| "github.com/ncabatoff/process-exporter/proc" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| ) | ||
|
|
||
| type BinaryNameMatcher struct { | ||
| name string | ||
| args []string | ||
| } | ||
|
|
||
| func (em BinaryNameMatcher) MatchAndName(nacl common.NameAndCmdline) (bool, string) { | ||
| if len(nacl.Cmdline) == 0 { | ||
| return false, "" | ||
| } | ||
| cmd := filepath.Base(nacl.Cmdline[0]) | ||
| return em.name == cmd, "" | ||
| } | ||
|
|
||
| var ( | ||
| numprocsDesc = prometheus.NewDesc( | ||
| "nginx_num_procs", | ||
| "number of processes", | ||
| nil, nil) | ||
|
|
||
| cpuSecsDesc = prometheus.NewDesc( | ||
| "nginx_cpu_seconds_total", | ||
| "Cpu usage in seconds", | ||
| nil, nil) | ||
|
|
||
| readBytesDesc = prometheus.NewDesc( | ||
| "nginx_read_bytes_total", | ||
| "number of bytes read", | ||
| nil, nil) | ||
|
|
||
| writeBytesDesc = prometheus.NewDesc( | ||
| "nginx_write_bytes_total", | ||
| "number of bytes written", | ||
| nil, nil) | ||
|
|
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| memResidentbytesDesc = prometheus.NewDesc( | ||
| "nginx_resident_memory_bytes", | ||
| "number of bytes of memory in use", | ||
| nil, nil) | ||
|
|
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| memVirtualbytesDesc = prometheus.NewDesc( | ||
| "nginx_virtual_memory_bytes", | ||
| "number of bytes of memory in use", | ||
| nil, nil) | ||
|
|
||
| startTimeDesc = prometheus.NewDesc( | ||
| "nginx_oldest_start_time_seconds", | ||
| "start time in seconds since 1970/01/01", | ||
| nil, nil) | ||
| ) | ||
|
|
||
| type namedProcess struct { | ||
| scrapeChan chan scrapeRequest | ||
| *proc.Grouper | ||
| fs *proc.FS | ||
| } | ||
|
|
||
| func NewNamedProcessCollector(children bool, mn common.MatchNamer) (prometheus.Collector, error) { | ||
| fs, err := proc.NewFS("/proc") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| p := namedProcess{ | ||
| scrapeChan: make(chan scrapeRequest), | ||
| Grouper: proc.NewGrouper(children, mn), | ||
| fs: fs, | ||
| } | ||
| _, err = p.Update(p.fs.AllProcs()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| go p.start() | ||
|
|
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| return p, nil | ||
| } | ||
|
|
||
| // Describe implements prometheus.Collector. | ||
| func (p namedProcess) Describe(ch chan<- *prometheus.Desc) { | ||
| ch <- cpuSecsDesc | ||
| ch <- numprocsDesc | ||
| ch <- readBytesDesc | ||
| ch <- writeBytesDesc | ||
| ch <- memResidentbytesDesc | ||
| ch <- memVirtualbytesDesc | ||
| ch <- startTimeDesc | ||
| } | ||
|
|
||
| // Collect implements prometheus.Collector. | ||
| func (p namedProcess) Collect(ch chan<- prometheus.Metric) { | ||
| req := scrapeRequest{results: ch, done: make(chan struct{})} | ||
| p.scrapeChan <- req | ||
| <-req.done | ||
| } | ||
|
|
||
| func (p namedProcess) start() { | ||
| for req := range p.scrapeChan { | ||
| ch := req.results | ||
| p.scrape(ch) | ||
| req.done <- struct{}{} | ||
| } | ||
| } | ||
|
|
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| func (p namedProcess) Stop() { | ||
| close(p.scrapeChan) | ||
| } | ||
|
|
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| func (p namedProcess) scrape(ch chan<- prometheus.Metric) { | ||
| _, err := p.Update(p.fs.AllProcs()) | ||
| if err != nil { | ||
| glog.Warningf("unexpected error obtaining nginx process info: %v", err) | ||
| return | ||
| } | ||
|
|
||
| for gname, gcounts := range p.Groups() { | ||
| ch <- prometheus.MustNewConstMetric(numprocsDesc, | ||
| prometheus.GaugeValue, float64(gcounts.Procs)) | ||
| ch <- prometheus.MustNewConstMetric(memResidentbytesDesc, | ||
| prometheus.GaugeValue, float64(gcounts.Memresident)) | ||
| ch <- prometheus.MustNewConstMetric(memVirtualbytesDesc, | ||
| prometheus.GaugeValue, float64(gcounts.Memvirtual)) | ||
| ch <- prometheus.MustNewConstMetric(startTimeDesc, | ||
| prometheus.GaugeValue, float64(gcounts.OldestStartTime.Unix())) | ||
| ch <- prometheus.MustNewConstMetric(cpuSecsDesc, | ||
| prometheus.CounterValue, gcounts.Cpu) | ||
| ch <- prometheus.MustNewConstMetric(readBytesDesc, | ||
| prometheus.CounterValue, float64(gcounts.ReadBytes)) | ||
| ch <- prometheus.MustNewConstMetric(writeBytesDesc, | ||
| prometheus.CounterValue, float64(gcounts.WriteBytes)) | ||
| } | ||
| } |
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