os_release.go: Follow symlink to real os-release path.

Fixes: #2981 Signed-off-by: Jonathan Davies <jpds@protonmail.com>
prometheus · Apr 15, 2024 · f19de48 · f19de48
1 parent bf67c85
commit f19de48
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/collector/os_release.go b/collector/os_release.go
@@ -18,6 +18,7 @@ import (
 	"errors"
 	"io"
 	"os"
+	"path/filepath"
 	"regexp"
 	"strconv"
 	"strings"
@@ -128,6 +129,11 @@ func parseOSRelease(r io.Reader) (*osRelease, error) {
 }
 
 func (c *osReleaseCollector) UpdateStruct(path string) error {
+	path, err := filepath.EvalSymlinks(path)
+	if err != nil {
+		return err
+	}
+
 	releaseFile, err := os.Open(path)
 	if err != nil {
 		return err