mtu can be set via command line

added also a test for this

Signed-off-by: Christian Goll <cgoll@suse.com>

CHANGELOG.md

@@ -40,6 +40,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Container file gids are now updated properly during syncuser. #840
 - Fix build for API.
 - Bindd mounts for `wwctl exec` are now on the same fs
+- Fixed the ability to set MTU with wwctl #947
 
 ### Changed
 

internal/app/wwctl/node/set/main_test.go

@@ -347,6 +347,30 @@ nodes:
       /dev/disk/by-partlabel/var:
         format: btrfs
         path: /var
+`},
+		{name: "single node set mtu",
+			args:    []string{"--mtu", "1234", "--netname=mynet", "n01"},
+			wantErr: false,
+			stdout:  "",
+			inDB: `WW_INTERNAL: 43
+nodeprofiles:
+  default:
+    comment: testit
+nodes:
+  n01:
+    profiles:
+    - default`,
+			outDb: `WW_INTERNAL: 43
+nodeprofiles:
+  default:
+    comment: testit
+nodes:
+  n01:
+    profiles:
+    - default
+    network devices:
+      mynet:
+        mtu: "1234"
 `},
 	}
 	for _, tt := range tests {

internal/pkg/node/flags.go

@@ -69,7 +69,7 @@ func createFlags(baseCmd *cobra.Command, excludeList []string,
 			case "uint":
 				converters = append(converters, func() error {
 					if !util.InSlice(GetUnsetVerbs(), *ptr) && *ptr != "" {
-						_, err := strconv.ParseUint(myType.Tag.Get(*ptr), 10, 32)
+						_, err := strconv.ParseUint(*ptr, 10, 32)
 						if err != nil {
 							return err
 						}