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- // 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.
-
- //go:build !windows && !js
- // +build !windows,!js
-
- 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)
- }
- }
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