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Better error handling when collecting CPU temps

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Log why we couldn't collect the temperature, and set metric to NaN if
the CPU should support temperature collection but had an error.
This commit is contained in:
Dominik Honnef 2017-01-05 06:47:13 +01:00
parent 782eaee100
commit d827db8e17
1 changed files with 13 additions and 3 deletions
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16
collector/cpu_freebsd.go
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@ -17,10 +17,12 @@ package collector
import (
"fmt"
"math"
"strconv"
"unsafe"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/log"
"golang.org/x/sys/unix"
)
@ -130,10 +132,18 @@ func (c *statCollector) Update(ch chan<- prometheus.Metric) (err error) {
ch <- c.cpu.mustNewConstMetric(float64(t.idle), lcpu, "idle")
temp, err := unix.SysctlUint32(fmt.Sprintf("dev.cpu.%d.temperature", cpu))
if err == nil {
ftemp := float64(temp-2732) / 10
ch <- c.temp.mustNewConstMetric(ftemp, lcpu)
if err != nil {
if err == unix.ENOENT {
// No temperature information for this CPU
log.Debugf("no temperature information for CPU %d", cpu)
} else {
// Unexpected error
ch <- c.temp.mustNewConstMetric(math.NaN(), lcpu)
log.Errorf("failed to query CPU temperature for CPU %d: %s", cpu, err)
}
continue
}
ch <- c.temp.mustNewConstMetric(float64(temp-2732)/10, lcpu)
}
return err
}