Add filesystem read-only metric node_filesystem_readonly

This is a boolean metric which is set to 1 when the filesystem is flagged as
read-only.

1 files changed, 7 insertions, 0 deletions

diff --git a/collector/filesystem_linux.go b/collector/filesystem_linux.go
index 847cc5c..7fafcfb 100644
--- a/collector/filesystem_linux.go
+++ b/collector/filesystem_linux.go
@@ -26,6 +26,7 @@ import (
 
 const (
         defIgnoredMountPoints = "^/(sys|proc|dev)($|/)"
+        ST_RDONLY             = 0x1
 )
 
 type filesystemDetails struct {
@@ -54,6 +55,11 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
                         continue
                 }
 
+                var ro float64
+                if buf.Flags & ST_RDONLY != 0 {
+                        ro = 1
+                }
+
                 labelValues := []string{mpd.device, mpd.mountPoint, mpd.fsType}
                 stats = append(stats, filesystemStats{
                         labelValues: labelValues,
@@ -62,6 +68,7 @@ func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
                         avail:       float64(buf.Bavail) * float64(buf.Bsize),
                         files:       float64(buf.Files),
                         filesFree:   float64(buf.Ffree),
+                        ro:          ro,
                 })
         }
         return stats, nil