Replace dhcpd and tftp with dnsmasq
===================================

The isc `dhcpd` server and `tftp` service can be replaced by `dnsmasq` as 
singe service, which has also the benefit that dns entries for the 
wwarewulf cluster will then also be provided.

Installation
-----------

Before the installation, make sure that `dhcpd` and `tftp` are disabled.
You can do that with the commands:
```
systemctl disable dhcpd
systemctl stop dhcpd
systemctl disable tftp
systemctl stop tftp
```

Now you can install `dnsmasq` with command 
```
zypper install dnsmasq
```

After the installation you have to instruct `warewulf` to use  `dnsmasq` as
`dhcpd` and `tftp` service, `dnsmasq` has to be specified in the configuration
file `/etc/warewulf/warewulf.conf`. There you have to change the two following 
values:
```
tftp:
  systemd name: dnsmasq
dhcp:
  systemd name: dnsmasq
```

The configuration of `dnsmasq` doesn't need to be changed, as the default configuration
includes all files with following pattern `/etc/dnsmasq.d/*conf` into its configuration.
This configuration is created by the template `overlays/host/etc/dnsmasq.d/ww4-hosts.conf.ww`.
In order to build this template run
```
wwctl overlay build -H
```
After that the `dnsmasq` service has to be enabled with either
```
systemctl enable --now dnsmasq
```
or by (re)configuring warewulf with 
```
wwctl configure dhcp
wwctl configure tftp
```