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Differentiate ErrNoData and other errors (#1323, #1723)

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Signed-off-by: Li Ling <liiling@google.com>
This commit is contained in:
Li Ling 2020-09-01 16:21:36 +02:00
parent 875f437fcc
commit bf154d485b
2 changed files with 20 additions and 5 deletions
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9
collector/pressure_linux.go
View file

@ -16,7 +16,9 @@
package collector
import (
"errors"
"fmt"
"os"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
@ -88,8 +90,11 @@ func (c *pressureStatsCollector) Update(ch chan<- prometheus.Metric) error {
level.Debug(c.logger).Log("msg", "collecting statistics for resource", "resource", res)
vals, err := c.fs.PSIStatsForResource(res)
if err != nil {
level.Debug(c.logger).Log("msg", "pressure information is unavailable, you need a Linux kernel >= 4.20 and/or CONFIG_PSI enabled for your kernel")
return ErrNoData
if errors.Is(err, os.ErrNotExist) {
level.Debug(c.logger).Log("msg", "pressure information is unavailable, you need a Linux kernel >= 4.20 and/or CONFIG_PSI enabled for your kernel")
return ErrNoData
}
return fmt.Errorf("failed to retrieve pressure stats: %w", err)
}
switch res {
case "cpu":

16
collector/rapl_linux.go
View file

@ -16,15 +16,20 @@
package collector
import (
"errors"
"fmt"
"os"
"strconv"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs/sysfs"
)
type raplCollector struct {
fs sysfs.FS
fs sysfs.FS
logger log.Logger
}
func init() {
@ -40,7 +45,8 @@ func NewRaplCollector(logger log.Logger) (Collector, error) {
}
collector := raplCollector{
fs: fs,
fs: fs,
logger: logger,
}
return &collector, nil
}
@ -50,7 +56,11 @@ func (c *raplCollector) Update(ch chan<- prometheus.Metric) error {
// nil zones are fine when platform doesn't have powercap files present.
zones, err := sysfs.GetRaplZones(c.fs)
if err != nil {
return ErrNoData
if errors.Is(err, os.ErrNotExist) {
level.Debug(c.logger).Log("msg", "Platform doesn't have powercap files present", "err", err)
return ErrNoData
}
return fmt.Errorf("failed to retrieve rapl stats: %w", err)
}
for _, rz := range zones {