beatzaplenty/nixos
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix(pxe-boot): use pxe-service for proxy DHCP initial boot offers

Browse Source 
dnsmasq 2.93 does not send proxy DHCP offers from dhcp-boot alone in proxy
mode — pxe-service is required to trigger proxy offers for the initial boot.

Replace the dhcp-boot-based arch detection with pxe-service entries for
arch 0 (BIOS), 7 (EFI BC / OVMF), and 9 (EFI x86-64), then use dhcp-boot
only for the iPXE second-boot HTTP chain (tag:ipxe clients). Add log-dhcp
for post-deploy verification.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
beatzaplenty
2026-07-27 15:03:01 +10:00
co-authored by Claude Sonnet 4.6
parent c770feebc9
commit f0e76f8aff
1 changed files with 14 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
modules/build-types/pxe-boot.nix
+14 -11
View File
@@ -427,18 +427,21 @@ in
# Without this dnsmasq tries to bind port 53 which systemd-resolved # Without this dnsmasq tries to bind port 53 which systemd-resolved
# already owns, causing startup failure. # already owns, causing startup failure.
port = 0; port = 0;
dhcp-range = [ "192.168.2.0,proxy" ]; log-dhcp = true;
dhcp-match = [ dhcp-range = "192.168.2.0,proxy";
"set:ipxe,175" # Detect iPXE clients on the second DHCP round (after loading the
"set:efi64,option:client-arch,7" # iPXE binary) so we can serve the HTTP menu instead of TFTP.
"set:efi64,option:client-arch,9" dhcp-match = "set:ipxe,175";
];
dhcp-userclass = "set:ipxe,iPXE"; dhcp-userclass = "set:ipxe,iPXE";
dhcp-boot = [ # iPXE second boot: chain to HTTP boot menu.
"tag:ipxe,tag:efi64,http://${vars.pxeServerIp}/boot.ipxe" dhcp-boot = "tag:ipxe,http://${vars.pxeServerIp}/boot.ipxe";
"tag:ipxe,http://${vars.pxeServerIp}/boot.ipxe" # Initial boot: use pxe-service so dnsmasq sends proxy DHCP offers.
"tag:efi64,ipxe.efi,,${vars.pxeServerIp}" # dhcp-boot alone does not trigger proxy offers in dnsmasq 2.93.
"undionly.kpxe,,${vars.pxeServerIp}" # Arch 0 = BIOS, 7 = EFI BC (OVMF), 9 = EFI x86-64.
pxe-service = [
"0,\"Network Boot\",undionly.kpxe,${vars.pxeServerIp}"
"7,\"Network Boot\",ipxe.efi,${vars.pxeServerIp}"
"9,\"Network Boot\",ipxe.efi,${vars.pxeServerIp}"
]; ];
}; };
}; };