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Add flag to disable guest CPU metrics 

In high scale virtualized / cloud environments there are typically
no guest VMs. Add a boolean flag to allow disabling the Linux guest
CPU metrics.

Signed-off-by: Ben Kochie <superq@gmail.com>
This commit is contained in:
Ben Kochie 2021-08-17 11:51:19 +02:00
parent 832909dd25
commit 84b36c4fd8
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GPG Key ID: C646B23C9E3245F1
2 changed files with 8 additions and 3 deletions
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2
CHANGELOG.md
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@ -5,6 +5,8 @@
* [ENHANCEMENT]
* [BUGFIX]
* [ENHANCEMENT] Add flag to disable guest CPU metrics #2123
## 1.2.2 / 2021-08-06
* [BUGFIX] Fix processes collector long int parsing #2112

9
collector/cpu_linux.go
View File

@ -50,6 +50,7 @@ type cpuCollector struct {
const jumpBackSeconds = 3.0
var (
enableCPUGuest = kingpin.Flag("collector.cpu.guest", "Enables metric node_cpu_guest_seconds_total").Default("true").Bool()
enableCPUInfo = kingpin.Flag("collector.cpu.info", "Enables metric cpu_info").Bool()
flagsInclude = kingpin.Flag("collector.cpu.info.flags-include", "Filter the `flags` field in cpuInfo with a value that must be a regular expression").String()
bugsInclude = kingpin.Flag("collector.cpu.info.bugs-include", "Filter the `bugs` field in cpuInfo with a value that must be a regular expression").String()
@ -296,9 +297,11 @@ func (c *cpuCollector) updateStat(ch chan<- prometheus.Metric) error {
ch <- prometheus.MustNewConstMetric(c.cpu, prometheus.CounterValue, cpuStat.SoftIRQ, cpuNum, "softirq")
ch <- prometheus.MustNewConstMetric(c.cpu, prometheus.CounterValue, cpuStat.Steal, cpuNum, "steal")
// Guest CPU is also accounted for in cpuStat.User and cpuStat.Nice, expose these as separate metrics.
ch <- prometheus.MustNewConstMetric(c.cpuGuest, prometheus.CounterValue, cpuStat.Guest, cpuNum, "user")
ch <- prometheus.MustNewConstMetric(c.cpuGuest, prometheus.CounterValue, cpuStat.GuestNice, cpuNum, "nice")
if *enableCPUGuest {
// Guest CPU is also accounted for in cpuStat.User and cpuStat.Nice, expose these as separate metrics.
ch <- prometheus.MustNewConstMetric(c.cpuGuest, prometheus.CounterValue, cpuStat.Guest, cpuNum, "user")
ch <- prometheus.MustNewConstMetric(c.cpuGuest, prometheus.CounterValue, cpuStat.GuestNice, cpuNum, "nice")
}
}
return nil