Warn, instead of failing, if 'modprobe rbd' fails

Modprobe is a kernel operation that should only be done once to load the RBD module. The admin could've done this on the Kubernetes nodes. The RBD plugin can still try to load the module but it shouldnt fail the workflow if it doesnt succeed. Partially addresses #45190

Warn, instead of failing, if 'modprobe rbd' fails
ab77633c · Steve Leon · dddc6b86 · ab77633c
Commit ab77633c authored May 17, 2017 by Steve Leon
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rbd_util.go pkg/volume/rbd/rbd_util.go +1 -1

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--- a/pkg/volume/rbd/rbd_util.go
+++ b/pkg/volume/rbd/rbd_util.go
@@ -264,7 +264,7 @@ func (util *RBDUtil) AttachDisk(b rbdMounter) error {
 		// modprobe
 		_, err = b.plugin.execCommand("modprobe", []string{"rbd"})
 		if err != nil {
-			return fmt.Errorf("rbd: failed to modprobe rbd error:%v", err)
+			glog.Warningf("rbd: failed to load rbd kernel module:%v", err)
 		}

 		// fence off other mappers