client_golang/prometheus/process_collector_procfs.go

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// Copyright 2015 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 linux plan9 solaris
package prometheus
import "github.com/prometheus/procfs"
func processCollectSupported() bool {
if _, err := procfs.NewStat(); err == nil {
return true
}
return false
}
func (c *processCollector) processCollect(ch chan<- Metric) {
pid, err := c.pidFn()
if err != nil {
c.reportCollectErrors(ch, err)
return
}
p, err := procfs.NewProc(pid)
if err != nil {
c.reportCollectErrors(ch, err)
return
}
if stat, err := p.NewStat(); err != nil {
// Report collect errors for metrics depending on stat.
ch <- NewInvalidMetric(c.vsize.Desc(), err)
ch <- NewInvalidMetric(c.rss.Desc(), err)
ch <- NewInvalidMetric(c.startTime.Desc(), err)
ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
} else {
c.cpuTotal.Set(stat.CPUTime())
ch <- c.cpuTotal
c.vsize.Set(float64(stat.VirtualMemory()))
ch <- c.vsize
c.rss.Set(float64(stat.ResidentMemory()))
ch <- c.rss
if startTime, err := stat.StartTime(); err != nil {
ch <- NewInvalidMetric(c.startTime.Desc(), err)
} else {
c.startTime.Set(startTime)
ch <- c.startTime
}
}
if fds, err := p.FileDescriptorsLen(); err != nil {
ch <- NewInvalidMetric(c.openFDs.Desc(), err)
} else {
c.openFDs.Set(float64(fds))
ch <- c.openFDs
}
if limits, err := p.NewLimits(); err != nil {
ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
} else {
c.maxFDs.Set(float64(limits.OpenFiles))
ch <- c.maxFDs
}
}
func (c *processCollector) reportCollectErrors(ch chan<- Metric, err error) {
ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
ch <- NewInvalidMetric(c.openFDs.Desc(), err)
ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
ch <- NewInvalidMetric(c.vsize.Desc(), err)
ch <- NewInvalidMetric(c.rss.Desc(), err)
ch <- NewInvalidMetric(c.startTime.Desc(), err)
}