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Merge pull request #13 from nix-community/kexec

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Kexec
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Jörg Thalheim 2022-09-05 06:36:42 +01:00 committed by GitHub
commit 8e56ab02ce
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2 changed files with 12 additions and 13 deletions
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8
nix/kexec-installer-test.nix
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@ -16,7 +16,7 @@ in makeTest' {
nodes = { nodes = {
node1 = { ... }: { node1 = { ... }: {
virtualisation.vlans = [ ]; virtualisation.vlans = [ ];
virtualisation.memorySize = 4 * 1024; virtualisation.memorySize = 2 * 1024 + 512;
virtualisation.diskSize = 4 * 1024; virtualisation.diskSize = 4 * 1024;
virtualisation.useBootLoader = true; virtualisation.useBootLoader = true;
virtualisation.useEFIBoot = true; virtualisation.useEFIBoot = true;
@ -55,10 +55,8 @@ in makeTest' {
# Kexec node1 to the toplevel of node2 via the kexec-boot script # Kexec node1 to the toplevel of node2 via the kexec-boot script
node1.succeed('touch /run/foo') node1.succeed('touch /run/foo')
node1.fail('hello') node1.fail('hello')
node1.succeed('mkdir -p /root/kexec') node1.succeed('tar -xf ${nodes.node2.config.system.build.kexecTarball}/tarball/nixos-kexec-installer-${pkgs.system}.tar.xz -C /root')
node1.succeed('mkdir -p /root/kexec') node1.execute('/root/kexec/run')
node1.succeed('tar -xf ${nodes.node2.config.system.build.kexecTarball}/tarball/nixos-kexec-installer-${pkgs.system}.tar.xz -C /root/kexec')
node1.execute('/root/kexec/kexec-boot')
# wait for machine to kexec # wait for machine to kexec
node1.execute('sleep 9999', check_return=False) node1.execute('sleep 9999', check_return=False)
node1.succeed('! test -e /run/foo') node1.succeed('! test -e /run/foo')

17
nix/kexec-installer.nix
View file

@ -9,7 +9,7 @@
# This is a variant of the upstream kexecScript that also allows embedding # This is a variant of the upstream kexecScript that also allows embedding
# a ssh key. # a ssh key.
system.build.kexecBoot = lib.mkForce (pkgs.writeScript "kexec-boot" '' system.build.kexecRun = lib.mkForce (pkgs.writeScript "kexec-run" ''
#!/usr/bin/env bash #!/usr/bin/env bash
set -ex set -ex
shopt -s nullglob shopt -s nullglob
@ -17,7 +17,7 @@
INITRD_TMP=$(mktemp -d) INITRD_TMP=$(mktemp -d)
cd "$INITRD_TMP" cd "$INITRD_TMP"
pwd pwd
mkdir initrd initrd/ssh mkdir -p initrd/ssh
pushd initrd pushd initrd
if [ -e /root/.ssh/authorized_keys ]; then if [ -e /root/.ssh/authorized_keys ]; then
cat /root/.ssh/authorized_keys >> ssh/authorized_keys cat /root/.ssh/authorized_keys >> ssh/authorized_keys
@ -28,7 +28,7 @@
for p in /etc/ssh/ssh_host_*; do for p in /etc/ssh/ssh_host_*; do
cp -a "$p" ssh cp -a "$p" ssh
done done
find -type f | cpio -o -H newc | gzip -9 > ../extra.gz find | cpio -o -H newc | gzip -9 > ../extra.gz
popd popd
cat "''${SCRIPT_DIR}/initrd.gz" extra.gz > final.gz cat "''${SCRIPT_DIR}/initrd.gz" extra.gz > final.gz
@ -40,6 +40,7 @@
rm -r "$INITRD_TMP" rm -r "$INITRD_TMP"
# Disconnect our background kexec from the terminal # Disconnect our background kexec from the terminal
echo "machine will boot into nixos in in 6s..."
if [[ -e /dev/kmsg ]]; then if [[ -e /dev/kmsg ]]; then
# this makes logging visible in `dmesg`, or the system consol or tools like journald # this makes logging visible in `dmesg`, or the system consol or tools like journald
exec > /dev/kmsg 2>&1 exec > /dev/kmsg 2>&1
@ -55,19 +56,19 @@
fileName = "nixos-kexec-installer-${pkgs.stdenv.hostPlatform.system}"; fileName = "nixos-kexec-installer-${pkgs.stdenv.hostPlatform.system}";
contents = [ contents = [
{ {
target = "/initrd.gz"; target = "/kexec/initrd.gz";
source = "${config.system.build.netbootRamdisk}/initrd"; source = "${config.system.build.netbootRamdisk}/initrd";
} }
{ {
target = "/bzImage"; target = "/kexec/bzImage";
source = "${config.system.build.kernel}/${config.system.boot.loader.kernelFile}"; source = "${config.system.build.kernel}/${config.system.boot.loader.kernelFile}";
} }
{ {
target = "/kexec-boot"; target = "/kexec/run";
source = config.system.build.kexecBoot; source = config.system.build.kexecRun;
} }
{ {
target = "/kexec"; target = "/kexec/kexec";
source = "${pkgs.pkgsStatic.kexec-tools}/bin/kexec"; source = "${pkgs.pkgsStatic.kexec-tools}/bin/kexec";
} }
]; ];