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Merge pull request #17 from nix-community/kexec

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kexec: cleanup tarball, use unpack dir to rebuild initrd
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Jörg Thalheim 2022-09-05 09:02:35 +01:00 committed by GitHub
commit a26ab9e809
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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 # 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('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') node1.execute('/root/kexec/run')
# wait for machine to kexec # wait for machine to kexec
node1.execute('sleep 9999', check_return=False) node1.execute('sleep 9999', check_return=False)

42
nix/kexec-installer.nix
View file

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