Catch missing schedstat file (#1641)

Suppres error log noise if schedstat file doesn't exist.

Signed-off-by: Ben Kochie <superq@gmail.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/collector/schedstat_linux.go b/collector/schedstat_linux.go
index 6810b93..d2f04f6 100644
--- a/collector/schedstat_linux.go
+++ b/collector/schedstat_linux.go
@@ -15,8 +15,10 @@ package collector
 
 import (
         "fmt"
+        "os"
 
         "github.com/go-kit/kit/log"
+        "github.com/go-kit/kit/log/level"
         "github.com/prometheus/client_golang/prometheus"
         "github.com/prometheus/procfs"
 )
@@ -68,6 +70,10 @@ func init() {
 func (c *schedstatCollector) Update(ch chan<- prometheus.Metric) error {
         stats, err := c.fs.Schedstat()
         if err != nil {
+                if os.IsNotExist(err) {
+                        level.Debug(c.logger).Log("msg", "schedstat file does not exist")
+                        return ErrNoData
+                }
                 return err
         }