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kexec: cleanup tarball, use unpack dir to rebuild initrd

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This commit is contained in:
Jörg Thalheim 2022-09-05 08:01:53 +00:00
parent 2913702b16
commit 2c9a008196
2 changed files with 19 additions and 25 deletions
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2
nix/kexec-installer-test.nix
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@ -55,7 +55,7 @@ in makeTest' {
# Kexec node1 to the toplevel of node2 via the kexec-boot script
node1.succeed('touch /run/foo')
node1.fail('hello')
node1.succeed('tar -xf ${nodes.node2.config.system.build.kexecTarball}/tarball/nixos-kexec-installer-${pkgs.system}.tar.xz -C /root')
node1.succeed('tar -xf ${nodes.node2.config.system.build.kexecTarball}/nixos-kexec-installer-${pkgs.system}.tar.gz -C /root')
node1.execute('/root/kexec/run')
# wait for machine to kexec
node1.execute('sleep 9999', check_return=False)

42
nix/kexec-installer.nix
View file

@ -14,7 +14,7 @@
set -ex
shopt -s nullglob
SCRIPT_DIR=$( cd -- "$( dirname -- "''${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
INITRD_TMP=$(mktemp -d)
INITRD_TMP=$(TMPDIR=$SCRIPT_DIR mktemp -d)
cd "$INITRD_TMP"
pwd
mkdir -p initrd/ssh
@ -30,10 +30,10 @@
done
find | cpio -o -H newc | gzip -9 > ../extra.gz
popd
cat "''${SCRIPT_DIR}/initrd.gz" extra.gz > final.gz
cat "''${SCRIPT_DIR}/initrd" extra.gz > final-initrd
"$SCRIPT_DIR/kexec" --load "''${SCRIPT_DIR}/bzImage" \
--initrd=final.gz \
--initrd=final-initrd \
--command-line "init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}"
# kexec will map the new kernel in memory so we can remove the kernel at this point
@ -52,27 +52,21 @@
nohup bash -c "sleep 6 && '$SCRIPT_DIR/kexec' -e" &
'');
system.build.kexecTarball = pkgs.callPackage (pkgs.path + "/nixos/lib/make-system-tarball.nix") {
fileName = "nixos-kexec-installer-${pkgs.stdenv.hostPlatform.system}";
contents = [
{
target = "/kexec/initrd.gz";
source = "${config.system.build.netbootRamdisk}/initrd";
}
{
target = "/kexec/bzImage";
source = "${config.system.build.kernel}/${config.system.boot.loader.kernelFile}";
}
{
target = "/kexec/run";
source = config.system.build.kexecRun;
}
{
target = "/kexec/kexec";
source = "${pkgs.pkgsStatic.kexec-tools}/bin/kexec";
}
];
};
system.build.kexecTarball = pkgs.runCommand "kexec-tarball" {} ''
mkdir kexec $out
cp "${config.system.build.netbootRamdisk}/initrd" kexec/initrd
cp "${config.system.build.kernel}/${config.system.boot.loader.kernelFile}" kexec/bzImage
cp "${config.system.build.kexecRun}" kexec/run
cp "${pkgs.pkgsStatic.kexec-tools}/bin/kexec" kexec/kexec
tar -czvf $out/nixos-kexec-installer-${pkgs.stdenv.hostPlatform.system}.tar.gz kexec
'';
# IPMI SOL console redirection stuff
boot.kernelParams = [
"console=ttyS0,115200n8"
"console=ttyAMA0,115200n8"
"console=tty0"
];
documentation.enable = false;
# Not really needed. Saves a few bytes and the only service we are running is sshd, which we want to be reachable.