IPv6: /etc/hosts support

Signed-off-by: Timothy Middelkoop <tmiddelkoop@internet2.edu>

CHANGELOG.md

@@ -27,6 +27,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Rename Netdev ip6addr to ipaddr6 for consistency
   - Set `addr-gen-mode=eui64`
 - Set dnsmasq to listen to the Warewulf interface to prevent to binding to localhost:53
+- Added Ipv6 support to `/etc/hosts` on host and nodes.
 
 ### Removed
 

overlays/host/internal/host_test.go

@@ -333,6 +333,14 @@ Filename: etc/hosts
 192.168.3.22  node1-secondary node1-wwnet1
 # Entry for node2
 192.168.3.23 node2 node2-default node2-wwnet0
+
+# Warewulf Ipv6
+2001:db8::1 %HOSTNAME% warewulf
+# Entry for node1
+2001:db8::111 node1 node1-default node1-wwnet0
+2001:db8::112  node1-secondary node1-wwnet1
+# Entry for node2
+2001:db8::121 node2 node2-default node2-wwnet0
 `
 
 const host_ssh_setup_csh = `backupFile: true

overlays/host/rootfs/etc/hosts.ww

@@ -14,3 +14,20 @@
 {{- end }}{{/* if ip */}}
 {{- end }}{{/* for each network device */}}
 {{- end }}{{/* for each node */}}
+
+{{- if .Ipv6 }}
+
+# Warewulf Ipv6
+{{$.Ipaddr6}} {{$.BuildHost}} warewulf
+
+{{- range $node := $.AllNodes}}{{/* for each node */}}
+# Entry for {{$node.Id}}
+{{- range $devname, $netdev := $node.NetDevs}}{{/* for each network device on the node */}}
+{{- if $netdev.Ipaddr6}}{{/* if we have an ip address on this network device */}}
+{{- /* emit the node name as hostname if this is the primary */}}
+{{$netdev.Ipaddr6}} {{if $netdev.Primary}}{{$node.Id}}{{end}} {{$node.Id}}-{{$devname}} {{if $netdev.Device}}{{$node.Id}}-{{$netdev.Device}}{{end}}
+{{- end }}{{/* if ip */}}
+{{- end }}{{/* for each network device */}}
+{{- end }}{{/* for each node */}}
+
+{{- end }}{{/* for .IPv6 */}}

overlays/hosts/rootfs/etc/hosts.ww

@@ -12,3 +12,20 @@
 {{- end }}
 {{- end }}
 {{- end }}
+
+{{- if .Ipv6 }}
+
+# Warewulf Ipv6
+{{$.Ipaddr6}} {{$.BuildHost}} warewulf
+
+{{- range $node := $.AllNodes}}{{/* for each node */}}
+# Entry for {{$node.Id}}
+{{- range $devname, $netdev := $node.NetDevs}}{{/* for each network device on the node */}}
+{{- if $netdev.Ipaddr6}}{{/* if we have an ip address on this network device */}}
+{{- /* emit the node name as hostname if this is the primary */}}
+{{$netdev.Ipaddr6}} {{if $netdev.Primary}}{{$node.Id}}{{end}} {{$node.Id}}-{{$devname}} {{if $netdev.Device}}{{$node.Id}}-{{$netdev.Device}}{{end}}
+{{- end }}{{/* if ip */}}
+{{- end }}{{/* for each network device */}}
+{{- end }}{{/* for each node */}}
+
+{{- end }}{{/* for .IPv6 */}}