ipxe boot to php static address then kernel/initrd boot without dhcp discover

[Alan Taylor]

Hi there,
Thanks for reading.
on the back of the drbl and clonezilla integration I would like to accomplish a linux boot using drbl and clonezilla which does not run a 'dhcpdiscover' and instead uses an assigned address from a 'boot.php' embeded script.
essentially my client should boot into ipxe, run a php script and then boot 'clonezilla' or 'distro-blah'
(I did have the clonezilla menu and such working but fiddled and lost the config)
essentially the php script assigned 'ip' should be used to integrate with drbl and mount a 'w/r' FS etc.
always happy to provide more information and/or answer questions?
Thanks,
Alan
NB =
process outline:
* PXE boot, ask for ip
* kea DHCP (server1) gives ip (x) assignment and 'next server' option (server2)
* 'next server' (server2) is contacted and ipxe and script is received
* ipxe script is run; assigns ip (y) from pool via 'boot.php' on server2, declares kernel, initrd and boots
* boot runs 'dhcpdiscover' received (x), negating 'boot.php' assigned ip
* mount of 'node' FS fails for drbl/clonezilla resources on server2 as (x) is blocked
* client drops into 'busybox'

ipxe file;

**#!ipxe
# obtain ip from proxy dhcp

:start

ifconf -c dhcp && isset ${filename} || goto start

:boot

# boot script from php server
chain http://192.168.3.199/boot.php?mac=${net0/mac}

:failure
echo Failure!
sleep 5

#For Troubleshooting after Failure...
shell

php file;
~~~

[Alan Taylor]

oh, appears that the 'php' file got truncated;

<?php
$mac = $_GET['mac'];
$pool = range(ip2long('x.211'), ip2long('x.220'));

// File for storing leases
$lease_file = '/var/www/leases.json';
$leases = file_exists($lease_file) ? json_decode(file_get_contents($lease_file), true) : [];

// Assign new if not leased
if (!isset($leases[$mac])) {
    $used_ips = array_values($leases);
    foreach ($pool as $ip_long) {
        $ip = long2ip($ip_long);
        if (!in_array($ip, $used_ips)) {
            $leases[$mac] = $ip;
            break;
        }
    }
    file_put_contents($lease_file, json_encode($leases));
}

$ip = $leases[$mac] ?? 'x.220'; // fallback
header('Content-Type: text/plain');
echo "#!ipxe\n";
echo "set net0/ip $ip\n";
echo "set net0/netmask 255.255.255.0\n";
echo "set net0/gateway x.1\n";
echo "set net0/dns x.188\n";
echo "set net0.dhcp-server x.199\n";
//echo "ifstat\n";
echo "kernel tftp://x.199/nbi_img/vmlinuz-pxe ip=$ip initrd=initrd-pxe.img\n";
echo "initrd tftp://x.199/nbi_img/initrd-pxe.img\n";
echo "boot\n";
//echo "boot tftp://x.199/nbi_img/vmlinuz-pxe initrd=initrd-pxe.img";
?>

[Alan Taylor]

on reflection this line of questioning is probably better suited for the DRBL forum; posted here; https://sourceforge.net/p/drbl/discussion/Help/thread/d981bc792e/

please let me know if I need to wrap this one up and how I should? thanks