Display auto-detected kernel version during iPXE and GRUB

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -37,6 +37,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Defined a menu for iPXE. #1156
 - Added logging to wwinit scripts. #1156
 - Renamed /warewulf/wwinit to /warewulf/prescripts. #1156
+- Display auto-detected kernel version during iPXE and GRUB. #1742
 
 ### Fixed
 

internal/pkg/warewulfd/provision.go

@@ -104,6 +104,11 @@ func ProvisionSend(w http.ResponseWriter, req *http.Request) {
 			kernelArgs = strings.Join(remoteNode.Kernel.Args, " ")
 			kernelVersion = remoteNode.Kernel.Version
 		}
+		if kernelVersion == "" {
+			if kernel_ := kernel.FromNode(&remoteNode); kernel_ != nil {
+				kernelVersion = kernel_.Version()
+			}
+		}
 		tmpl_data = &templateVars{
 			Id:            remoteNode.Id(),
 			Cluster:       remoteNode.ClusterName,
@@ -186,6 +191,11 @@ func ProvisionSend(w http.ResponseWriter, req *http.Request) {
 				kernelArgs = strings.Join(remoteNode.Kernel.Args, " ")
 				kernelVersion = remoteNode.Kernel.Version
 			}
+			if kernelVersion == "" {
+				if kernel_ := kernel.FromNode(&remoteNode); kernel_ != nil {
+					kernelVersion = kernel_.Version()
+				}
+			}
 			tmpl_data = &templateVars{
 				Id:            remoteNode.Id(),
 				Cluster:       remoteNode.ClusterName,