forked from mirrors/nixpkgs
Making the system-tarball-pc boot fine with PXE, and include help files and a
readme file as examples for an easy PXE setup. This allows booting the NixOS in the system tarball, and thus allows installing nixos. svn path=/nixos/trunk/; revision=28585
This commit is contained in:
Lluís Batlle i Rossell
parent
8f6a4be721
commit
4bc0bfec4c
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@ -21,13 +21,92 @@ let
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TOTALTIMEOUT 9000
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label nixos
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MENU LABEL ^NixOS base through NFS
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MENU LABEL ^NixOS using nfsroot
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KERNEL bzImage
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append initrd=initrd ip=dhcp tnfsroot=IPADDR:/home/pcroot systemConfig=${config.system.build.toplevel} init=${config.system.build.toplevel}/initrd
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append ip=dhcp nfsroot=/home/pcroot systemConfig=${config.system.build.toplevel} init=${config.system.build.toplevel}/init
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# I don't know how to make this boot with nfsroot (using the initrd)
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label nixos_initrd
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MENU LABEL NixOS booting the poor ^initrd.
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KERNEL bzImage
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append initrd=initrd ip=dhcp nfsroot=/home/pcroot systemConfig=${config.system.build.toplevel} init=${config.system.build.toplevel}/init
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label memtest
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MENU LABEL ^Memtest86+
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KERNEL memtest.bin
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KERNEL memtest
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'';
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dhcpdExampleConfig = pkgs.writeText "dhcpd.conf-example" ''
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# Example configuration for booting PXE.
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allow booting;
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allow bootp;
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# Adapt this to your network configuration.
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option domain-name "local";
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option subnet-mask 255.255.255.0;
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option broadcast-address 192.168.1.255;
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option domain-name-servers 192.168.1.1;
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option routers 192.168.1.1;
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# PXE-specific configuration directives...
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# Some BIOS don't accept slashes for paths inside the tftp servers,
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# and will report Access Violation if they see slashes.
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filename "pxelinux.0";
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# For the TFTP and NFS root server. Set the IP of your server.
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next-server 192.168.1.34;
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subnet 192.168.1.0 netmask 255.255.255.0 {
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range 192.168.1.50 192.168.1.55;
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}
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'';
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readme = pkgs.writeText "readme.txt" ''
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Let all the files in the system tarball sit in a directory served by NFS (the NFS root)
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like this in exportfs:
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/home/pcroot 192.168.1.0/24(rw,no_root_squash,no_all_squash)
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Run "exportfs -a" after editing /etc/exportfs, for the nfs server to be aware of the
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changes.
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Use a tftp server serving the root of boot/ (from the system tarball).
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In order to have PXE boot, use the boot/dhcpd.conf-example file for your dhcpd server,
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as it will point your PXE clients to pxelinux.0 from the tftp server. Adapt the
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configuration to your network.
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Adapt the pxelinux configuration (boot/pxelinux.cfg/default) to set the path to your
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nfrroot. If you use ip=dhcp in the kernel, the nfs server ip will be taken from
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dhcp and so you don't have to specify it.
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The linux in bzImage includes network drivers for some usual cards.
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QEMU Testing
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---------------
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You can test qemu pxe boot without having a DHCP server adapted, but having nfsroot,
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like this:
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qemu-system-x86_64 -tftp /home/pcroot/boot -net nic -net user,bootfile=pxelinux.0 -boot n
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I don't know how to use NFS through the qemu '-net user' though.
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QEMU Testing with NFS root and bridged network
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-------------------------------------------------
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This allows testing with qemu as any other host in your LAN.
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Testing with the real dhcpd server requires setting up a bridge and having a tap device.
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tunctl -t tap0
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brctl addbr br0
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brctl addif br0 eth0
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brctl addif tap0 eth0
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ifconfig eth0 0.0.0.0 up
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ifconfig tap0 0.0.0.0 up
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ifconfig br0 up # With your ip configuration
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Then you can run qemu:
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qemu-system-x86_64 -boot n -net tap,ifname=tap0,script=no -net nic,model=e1000
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'';
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in
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@ -58,8 +137,17 @@ in
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{ source = pxeconfig;
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target = "/boot/pxelinux.cfg/default";
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}
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{ source = readme;
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target = "/readme.txt";
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}
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{ source = dhcpdExampleConfig;
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target = "/boot/dhcpd.conf-example";
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}
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{ source = "${pkgs.memtest86}/memtest.bin";
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target = "/boot/memtest.bin";
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# We can't leave '.bin', because pxelinux interprets this specially,
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# and it would not load the image fine.
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# http://forum.canardpc.com/threads/46464-0104-when-launched-via-pxe
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target = "/boot/memtest";
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}
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];
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@ -69,19 +157,6 @@ in
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services.openssh.enable = true;
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jobs.openssh.startOn = pkgs.lib.mkOverrideTemplate 50 {} "";
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boot.initrd.postMountCommands = ''
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for o in $(cat /proc/cmdline); do
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case $o in
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tnfsroot=*)
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set -- $(IFS==; echo $o)
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# TODO: It cannot mount nfs, as maybe it cannot find 'mount.nfs'
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mount $2 /mnt-root
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;;
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*) ;;
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esac
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done
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'';
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boot.kernelPackages = pkgs.linuxPackages_2_6_39;
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nixpkgs.config = {
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packageOverrides = p: rec {
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@ -72,13 +72,16 @@ in
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inherit (config.tarball) contents storeContents;
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};
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# Otherwise it will collide with the 'ip=dhcp' kernel autoconfig.
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networking.useDHCP = false;
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boot.postBootCommands =
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''
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# After booting, register the contents of the Nix store on the
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# CD in the Nix database in the tmpfs.
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if [ -f /nix-path-registration ]; then
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${config.environment.nix}/bin/nix-store --load-db < /nix-path-registration &&
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rm /nix-path/registration
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rm /nix-path-registration
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fi
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# nixos-rebuild also requires a "system" profile and an
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