Fix inifiband collector log noise (#1599)

Handle non-existent infiniband results silent.

Fixes: https://github.com/prometheus/node_exporter/issues/1511

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

1 files changed, 6 insertions, 0 deletions

diff --git a/collector/infiniband_linux.go b/collector/infiniband_linux.go
index 9d3ff60..a062190 100644
--- a/collector/infiniband_linux.go
+++ b/collector/infiniband_linux.go
@@ -18,9 +18,11 @@ package collector
 
 import (
         "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"
 )
@@ -104,6 +106,10 @@ func (c *infinibandCollector) pushCounter(ch chan<- prometheus.Metric, name stri
 func (c *infinibandCollector) Update(ch chan<- prometheus.Metric) error {
         devices, err := c.fs.InfiniBandClass()
         if err != nil {
+                if os.IsNotExist(err) {
+                        level.Debug(c.logger).Log("msg", "IPv4 sockstat statistics not found, skipping")
+                        return nil
+                }
                 return fmt.Errorf("error obtaining InfiniBand class info: %s", err)
         }