| // Copyright 2019 The Prometheus 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. |
| |
| // +build !windows |
| |
| package prometheus |
| |
| import ( |
| "github.com/prometheus/procfs" |
| ) |
| |
| func canCollectProcess() bool { |
| _, err := procfs.NewDefaultFS() |
| return err == nil |
| } |
| |
| func (c *processCollector) processCollect(ch chan<- Metric) { |
| pid, err := c.pidFn() |
| if err != nil { |
| c.reportError(ch, nil, err) |
| return |
| } |
| |
| p, err := procfs.NewProc(pid) |
| if err != nil { |
| c.reportError(ch, nil, err) |
| return |
| } |
| |
| if stat, err := p.Stat(); err == nil { |
| ch <- MustNewConstMetric(c.cpuTotal, CounterValue, stat.CPUTime()) |
| ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(stat.VirtualMemory())) |
| ch <- MustNewConstMetric(c.rss, GaugeValue, float64(stat.ResidentMemory())) |
| if startTime, err := stat.StartTime(); err == nil { |
| ch <- MustNewConstMetric(c.startTime, GaugeValue, startTime) |
| } else { |
| c.reportError(ch, c.startTime, err) |
| } |
| } else { |
| c.reportError(ch, nil, err) |
| } |
| |
| if fds, err := p.FileDescriptorsLen(); err == nil { |
| ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(fds)) |
| } else { |
| c.reportError(ch, c.openFDs, err) |
| } |
| |
| if limits, err := p.Limits(); err == nil { |
| ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(limits.OpenFiles)) |
| ch <- MustNewConstMetric(c.maxVsize, GaugeValue, float64(limits.AddressSpace)) |
| } else { |
| c.reportError(ch, nil, err) |
| } |
| } |