Remove dependency on procfs/cgo in non-procfs systems
The procfs package has a cgo dependency (necessary to calculate system times). As procfs is not available under windows, darwin and supposely all newer BSD systems, this change remove the procfs dependency on these systems.
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728064bb68
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@ -1,6 +1,17 @@
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package prometheus
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// Copyright 2015 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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import "github.com/prometheus/procfs"
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package prometheus
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type processCollector struct {
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pid int
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@ -33,7 +44,7 @@ func NewProcessCollectorPIDFn(
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) *processCollector {
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c := processCollector{
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pidFn: pidFn,
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collectFn: noopCollect,
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collectFn: func(chan<- Metric) {},
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cpuTotal: NewCounter(CounterOpts{
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Namespace: namespace,
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@ -67,9 +78,9 @@ func NewProcessCollectorPIDFn(
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}),
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}
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// Use procfs to export metrics if available.
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if _, err := procfs.NewStat(); err == nil {
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c.collectFn = c.procfsCollect
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// Set up process metric collection if supported by the runtime.
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if processCollectSupported() {
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c.collectFn = c.processCollect
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}
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return &c
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@ -89,64 +100,3 @@ func (c *processCollector) Describe(ch chan<- *Desc) {
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func (c *processCollector) Collect(ch chan<- Metric) {
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c.collectFn(ch)
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}
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func noopCollect(ch chan<- Metric) {}
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func (c *processCollector) procfsCollect(ch chan<- Metric) {
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pid, err := c.pidFn()
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if err != nil {
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c.reportCollectErrors(ch, err)
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return
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}
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p, err := procfs.NewProc(pid)
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if err != nil {
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c.reportCollectErrors(ch, err)
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return
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}
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if stat, err := p.NewStat(); err != nil {
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// Report collect errors for metrics depending on stat.
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ch <- NewInvalidMetric(c.vsize.Desc(), err)
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ch <- NewInvalidMetric(c.rss.Desc(), err)
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
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} else {
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c.cpuTotal.Set(stat.CPUTime())
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ch <- c.cpuTotal
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c.vsize.Set(float64(stat.VirtualMemory()))
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ch <- c.vsize
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c.rss.Set(float64(stat.ResidentMemory()))
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ch <- c.rss
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if startTime, err := stat.StartTime(); err != nil {
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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} else {
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c.startTime.Set(startTime)
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ch <- c.startTime
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}
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}
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if fds, err := p.FileDescriptorsLen(); err != nil {
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ch <- NewInvalidMetric(c.openFDs.Desc(), err)
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} else {
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c.openFDs.Set(float64(fds))
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ch <- c.openFDs
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}
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if limits, err := p.NewLimits(); err != nil {
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ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
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} else {
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c.maxFDs.Set(float64(limits.OpenFiles))
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ch <- c.maxFDs
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}
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}
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func (c *processCollector) reportCollectErrors(ch chan<- Metric, err error) {
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ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
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ch <- NewInvalidMetric(c.openFDs.Desc(), err)
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ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
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ch <- NewInvalidMetric(c.vsize.Desc(), err)
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ch <- NewInvalidMetric(c.rss.Desc(), err)
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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}
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@ -0,0 +1,84 @@
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// Copyright 2015 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// +build linux plan9 solaris
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package prometheus
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import "github.com/prometheus/procfs"
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func processCollectSupported() bool {
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if _, err := procfs.NewStat(); err == nil {
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return true
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}
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return false
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}
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func (c *processCollector) processCollect(ch chan<- Metric) {
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pid, err := c.pidFn()
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if err != nil {
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c.reportCollectErrors(ch, err)
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return
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}
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p, err := procfs.NewProc(pid)
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if err != nil {
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c.reportCollectErrors(ch, err)
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return
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}
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if stat, err := p.NewStat(); err != nil {
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// Report collect errors for metrics depending on stat.
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ch <- NewInvalidMetric(c.vsize.Desc(), err)
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ch <- NewInvalidMetric(c.rss.Desc(), err)
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
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} else {
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c.cpuTotal.Set(stat.CPUTime())
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ch <- c.cpuTotal
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c.vsize.Set(float64(stat.VirtualMemory()))
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ch <- c.vsize
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c.rss.Set(float64(stat.ResidentMemory()))
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ch <- c.rss
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if startTime, err := stat.StartTime(); err != nil {
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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} else {
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c.startTime.Set(startTime)
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ch <- c.startTime
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}
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}
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if fds, err := p.FileDescriptorsLen(); err != nil {
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ch <- NewInvalidMetric(c.openFDs.Desc(), err)
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} else {
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c.openFDs.Set(float64(fds))
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ch <- c.openFDs
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}
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if limits, err := p.NewLimits(); err != nil {
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ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
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} else {
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c.maxFDs.Set(float64(limits.OpenFiles))
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ch <- c.maxFDs
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}
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}
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func (c *processCollector) reportCollectErrors(ch chan<- Metric, err error) {
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ch <- NewInvalidMetric(c.cpuTotal.Desc(), err)
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ch <- NewInvalidMetric(c.openFDs.Desc(), err)
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ch <- NewInvalidMetric(c.maxFDs.Desc(), err)
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ch <- NewInvalidMetric(c.vsize.Desc(), err)
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ch <- NewInvalidMetric(c.rss.Desc(), err)
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ch <- NewInvalidMetric(c.startTime.Desc(), err)
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}
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@ -0,0 +1,24 @@
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// Copyright 2015 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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// +build !linux,!plan9,!solaris
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package prometheus
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func processCollectSupported() bool {
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return false
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}
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func (c *processCollector) processCollect(ch chan<- Metric) {
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panic("unreachable")
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}
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