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Revert "Local part of magic rollbacks."

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This reverts commit 14124ca6f8.
This commit is contained in:
Chloe Kever 2022-02-01 16:31:46 -08:00
parent 14124ca6f8
commit ebb3670b83
1 changed files with 6 additions and 30 deletions
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36
flake.nix
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@ -11,41 +11,19 @@
forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; overlays = [ self.overlay ]; });
in rec
{
{
overlay = final: prev: {
generateApps = flake:
let
machines = builtins.attrNames flake.nixosConfigurations;
validMachines = final.lib.remove "" (final.lib.forEach machines (x: final.lib.optionalString (flake.nixosConfigurations."${x}"._module.args ? nixinate) "${x}" ));
mkDeployScript = machine: let
rollback = flake.nixosConfigurations.${machine}._module.args.nixinate.rollback or {};
rollbackEnabled = rollback.enable or true;
rollbackInit = rollback.init or 500;
rollbackLimit = rollback.limit or 8;
rollbackTimeout = rollback.timeout or 10;
rollbackScript = if rollbackEnabled then ''
racc=${toString rollbackLimit}
exp=0
until ${final.openssh}/bin/ssh -o ConnectTimeout=${toString rollbackTimeout} -t $SSH_USER@$SSH_HOST 'sudo rm /tmp/.nixinate-deploy-succeeded' &> /dev/null; do
rbp=$((${toString rollbackInit} * (2 ** $exp)))
echo "Could not access ${machine}, trying again in $rbp milliseconds."
sleep $(($rbp / 1000)
exp=$(($exp + 1))
racc=$(($racc - 1))
if [[ $racc == 0 ]]; then
echo "Cannot access ${machine}. Rollback will happen." >&2
exit 1
fi
done
echo "${machine} has finished deploying."
'' else "";
in final.writeScript "deploy-${machine}.sh" ''
mkDeployScript = machine: final.writeScript "deploy-${machine}.sh" ''
set -e
SSH_USER=${flake.nixosConfigurations.${machine}._module.args.nixinate.sshUser}
SSH_HOST=${flake.nixosConfigurations.${machine}._module.args.nixinate.host}
BUILD_ON=${flake.nixosConfigurations.${machine}._module.args.nixinate.buildOn}
SYSTEM_CLOSURE=${flake}#nixosConfigurations.${machine}.config.system.build.toplevel
echo "🚀 Deploying nixosConfigurations.${machine} from ${flake}"
echo "👤 SSH User: $SSH_USER"
echo "🌐 SSH Host: $SSH_HOST"
@ -54,14 +32,12 @@
( set -x; ${final.rsync}/bin/rsync -q -vz --recursive --zc=zstd ${flake}/* $SSH_USER@$SSH_HOST:/tmp/nixcfg/ )
echo "🤞 Activating configuration on ${machine} via ssh:"
( set -x; ${final.openssh}/bin/ssh -t $SSH_USER@$SSH_HOST 'sudo nixos-rebuild switch --flake /tmp/nixcfg#${machine}' )
${rollbackScript}
elif [ $BUILD_ON = "local" ]; then
echo "🔨 Building system closure locally and copying it to remote store:"
( set -x; ${final.nixFlakes}/bin/nix copy --to ssh://$SSH_USER@$SSH_HOST $SYSTEM_CLOSURE )
echo "🤞 Activating configuration on ${machine} via ssh:"
SYSTEM_CLOSURE_PATH=$(${final.nixFlakes}/bin/nix path-info $SYSTEM_CLOSURE)
( set -x; ${final.openssh}/bin/ssh -t $SSH_USER@$SSH_HOST "sudo $SYSTEM_CLOSURE_PATH/bin/switch-to-configuration switch" )
${rollbackScript}
else
echo "_module.args.nixinate.buildOn is not set to a valid value of 'local' or 'remote'"
fi
@ -72,8 +48,8 @@
(
nixpkgs.lib.genAttrs
validMachines
(x:
{
(x:
{
type = "app";
program = toString (mkDeployScript x);
}
@ -84,4 +60,4 @@
nixinate = forAllSystems (system: nixpkgsFor.${system}.generateApps);
apps = nixinate.x86_64-linux examples;
};
}
}