Improved netplan support

Amother other things, implements support for bonds.

- Fixes: #1873

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

CHANGELOG.md

@@ -9,6 +9,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Changed
 
 - `warewulfd` overlay autobuild rebuilds overlays after node discovery. #1468
+### Fixed
+
+- Improved netplan support. #1873
 
 ## v4.6.2, 2025-07-09
 

overlays/netplan/internal/netplan_test.go

@@ -14,7 +14,7 @@ func Test_netplanOverlay(t *testing.T) {
 	env := testenv.New(t)
 	defer env.RemoveAll()
 	env.ImportFile("etc/warewulf/nodes.conf", "nodes.conf")
-	env.ImportFile("var/lib/warewulf/overlays/netplan/rootfs/etc/netplan/01-netcfg.yaml.ww", "../rootfs/etc/netplan/01-netcfg.yaml.ww")
+	env.ImportFile("var/lib/warewulf/overlays/netplan/rootfs/etc/netplan/warewulf.yaml.ww", "../rootfs/etc/netplan/warewulf.yaml.ww")
 
 	tests := []struct {
 		name string
@@ -23,7 +23,7 @@ func Test_netplanOverlay(t *testing.T) {
 	}{
 		{
 			name: "netplan",
-			args: []string{"--render", "node1", "netplan", "etc/netplan/01-netcfg.yaml.ww"},
+			args: []string{"--render", "node1", "netplan", "etc/netplan/warewulf.yaml.ww"},
 			log:  netplan,
 		},
 	}
@@ -49,26 +49,22 @@ func Test_netplanOverlay(t *testing.T) {
 
 const netplan string = `backupFile: true
 writeFile: true
-Filename: 01-netcfg.yaml
+Filename: etc/netplan/warewulf.yaml
 # This file is autogenerated by warewulf
 network:
   version: 2
   renderer: networkd
   ethernets:
-     wwnet0:
-        addresses:
-           - 192.168.3.21/24
-        mtu: 1500
-backupFile: true
-writeFile: true
-Filename: 01-netcfg.yaml
-# This file is autogenerated by warewulf
-network:
-  version: 2
-  renderer: networkd
-  ethernets:
-     wwnet1:
-        addresses:
-           - 192.168.3.22/24
-        mtu: 9000
+    wwnet0:
+      dhcp4: no
+      optional: true
+      addresses:
+      - 192.168.3.21/24
+      mtu: 1500
+    wwnet1:
+      dhcp4: no
+      optional: true
+      addresses:
+      - 192.168.3.22/24
+      mtu: 9000
 `

overlays/netplan/rootfs/etc/netplan/01-netcfg.yaml.ww

@@ -1,12 +0,0 @@
-{{range $devname, $netdev := .NetDevs -}}
-{{ file "01-netcfg.yaml" }}
-# This file is autogenerated by warewulf
-network:
-  version: 2
-  renderer: networkd
-  ethernets:
-     {{$netdev.Device}}:
-        addresses:
-           - {{$netdev.IpCIDR}}
-        mtu: {{$netdev.MTU}}
-{{end -}}

overlays/netplan/rootfs/etc/netplan/warewulf.yaml.ww

@@ -0,0 +1,63 @@
+# This file is autogenerated by warewulf
+network:
+  version: 2
+  renderer: networkd
+{{- $ethernets := list }}
+{{- $bonds := list }}
+{{- $NetDevs := .NetDevs }}
+{{- range $devname, $netdev := .NetDevs }}
+{{- if $netdev.Device }}
+{{- if eq (default "ethernet" (lower $netdev.Type)) "ethernet" }}
+{{- $ethernets = append $ethernets $devname }}
+{{- else if eq (lower $netdev.Type) "bond" }}
+{{- $bonds = append $bonds $devname }}
+{{- end }}
+{{- end }}
+{{- end }}
+{{- if $ethernets }}
+  ethernets:
+{{- range $devname := $ethernets }}
+{{- $netdev := (index $NetDevs $devname) }}
+    {{$netdev.Device}}:
+      dhcp4: no
+      optional: true
+{{- if $netdev.IpCIDR }}
+      addresses:
+      - {{$netdev.IpCIDR}}
+{{- end }}
+{{- if $netdev.MTU}}
+      mtu: {{$netdev.MTU}}
+{{- end }}
+{{- end }}
+{{- end }}
+{{- if $bonds }}
+  bonds:
+{{- range $devname := $bonds }}
+{{- $netdev := (index $NetDevs $devname) }}
+    {{$netdev.Device}}:
+      dhcp4: no
+      optional: true
+{{- if $netdev.IpCIDR }}
+      addresses:
+      - {{$netdev.IpCIDR}}
+{{- end }}
+{{- if $netdev.MTU}}
+      mtu: {{$netdev.MTU}}
+{{- end }}
+      parameters:
+        mode: {{ default "balance-rr" $netdev.Tags.mode }}
+        mii-monitor-interval: {{ default 100 $netdev.Tags.miimon }}
+{{- $interfaces := list }}
+{{- range $ifacename, $iface := $NetDevs }}
+{{- if eq $iface.Tags.master $devname }}
+{{- $interfaces = append $interfaces $ifacename }}
+{{- end }}
+{{- end }}
+{{- if $interfaces }}
+      interfaces:
+{{- range $ifacename := $interfaces }}
+      - {{ $ifacename }}
+{{- end }}
+{{- end }}
+{{- end }}
+{{- end }}