57 lines
2.3 KiB
Nix
57 lines
2.3 KiB
Nix
{ lib, pkgs, nodes, config, ... }:
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# The way the connection is established is specific to the wob01 site and the Intel S2600KPR blades.
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# Proper netboot is not possible, because while the blades and the APU board (which is the netboot
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# server here) are in the same L2 network, the uplink connection of each blade is an LACP LAG,
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# meaning that the switch on the other side will only enable the port if it sees valid LACP packets.
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# IPXE sends out these LACP packets while it is probing the ports, however the NICs of the blades
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# do not have a flash which IPXE could be written to.
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# We work around this by presenting a virtual floppy drive using the "IUSB" protocol of the BMC.
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# This virtual floppy drive contains an per-blade customized IPXE script which will initialize the
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# network connection including IP configuration and chainload the actual script off the netboot
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# server.
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let
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netboot-server-ip = "2a01:584:11::2";
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in {
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networking.firewall.allowedTCPPorts = [ 80 ];
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systemd.services = lib.mapAttrs' (nodename: node: let
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ip = "2a01:584:11::1:${toString node.config.bagel.baremetal.builders.num}";
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bmcIp = "192.168.1.${toString (node.config.bagel.baremetal.builders.num * 4 + 2)}";
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gw = "2a01:584:11::1";
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dns = "2a01:580:6000::ff01";
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ipxe = node.pkgs.ipxe.override {
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embedScript = builtins.toFile "bootstrap-${node.config.networking.hostName}.ipxe" ''
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#!ipxe
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ifopen net0
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echo ip ${ip}/64
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set net0/ip6:ipv6 ${ip}
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set net0/len6:int8 64
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echo gw ${gw}
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set net0/gateway6:ipv6 ${gw}
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echo dns ${dns}
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set net0/dns6:ipv6 ${dns}
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# wait for the lacp link to come up
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ping --count 20 ${gw}
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chain https://hydra.forkos.org/job/infra/main/${node.config.networking.hostName}/latest/download-by-type/file/ipxe
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# if it fails, show a shell
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shell
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'';
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};
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in lib.nameValuePair "iusb-spoof-${nodename}" {
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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Restart = "on-failure";
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};
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script = ''
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AUTH_TOKEN=$(${pkgs.iusb-spoof}/bin/make-token ${bmcIp})
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exec ${pkgs.iusb-spoof}/bin/iusb-spoof -r ${bmcIp} 5123 $AUTH_TOKEN ${ipxe}/ipxe-efi.usb
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'';
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}) (lib.filterAttrs (_: node: node.config.bagel.baremetal.builders.enable && node.config.bagel.baremetal.builders.netboot) nodes);
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}
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