config/modules/services/deployerbot/default.nix

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{
config,
lib,
pkgs,
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myData,
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...
}: {
options.mj.services.deployerbot.main = with lib.types; {
enable = lib.mkEnableOption "Enable system updater orchestrator";
deployDerivations = lib.mkOption {type = listOf str;};
uidgid = lib.mkOption {type = int;};
repo = lib.mkOption {type = str;};
};
options.mj.services.deployerbot.follower = with lib.types; {
enable = lib.mkEnableOption "Allow system to be deployed with deployerbot";
publicKey = lib.mkOption {type = str;};
uidgid = lib.mkOption {type = int;};
};
config = lib.mkMerge [
(with config.mj.services.deployerbot.main;
lib.mkIf enable {
# TODO: git config --global user.email bot@jakstys.lt
users.users.deployerbot-main = {
description = "Deployerbot Main";
home = "/var/lib/deployerbot-main";
useDefaultShell = true;
group = "deployerbot-main";
isSystemUser = true;
createHome = true;
uid = uidgid;
};
users.groups.deployerbot-main.gid = uidgid;
systemd.services.deployerbot = {
description = "Update all known systems";
serviceConfig = {
Type = "oneshot";
User = "deployerbot-main";
WorkingDirectory = config.users.users.deployerbot-main.home;
LoadCredential = ["ssh-key:/etc/ssh/ssh_host_ed25519_key"];
};
script = let
deployDerivationsStr = builtins.concatStringsSep " " deployDerivations;
in ''
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set -x
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export PATH=$PATH:${pkgs.git}/bin:${pkgs.openssh}/bin:${pkgs.nix}/bin
export GIT_SSH_COMMAND="ssh -i ''${CREDENTIALS_DIRECTORY}/ssh-key"
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if [[ ! -d config ]]; then
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git clone ${repo} config
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cd config
else
cd config
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git fetch origin
git reset --hard origin/main
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fi
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nix flake update --accept-flake-config --commit-lock-file
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nix run .#deploy-rs -- \
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--ssh-opts="-i ''${CREDENTIALS_DIRECTORY}/ssh-key" \
--ssh-user=deployerbot-follower \
--targets ${deployDerivationsStr}
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git push origin main
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'';
};
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systemd.timers.deployerbot = {
description = "deployerbot-main timer";
wantedBy = ["timers.target"];
# 15:38 UTC was the latest merge that I have observed since
# making the commit by looking at 3 commits of this repo.
# Let's try to be optimistic.
timerConfig.OnCalendar = "*-*-* 16:00:00 UTC";
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};
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mj.base.unitstatus.units = ["deployerbot"];
nix.settings.trusted-users = ["deployerbot-main"];
})
(with config.mj.services.deployerbot.follower;
lib.mkIf enable {
users.users = {
deployerbot-follower = {
description = "Deployerbot Follower";
home = "/var/lib/deployerbot-follower";
useDefaultShell = true;
group = "deployerbot-follower";
extraGroups = ["wheel"];
isSystemUser = true;
createHome = true;
uid = uidgid;
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openssh.authorizedKeys.keys = let
restrictedPubKey = "from=\"${myData.tailscale_subnet.pattern}\" " + publicKey;
in [restrictedPubKey];
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};
};
users.groups.deployerbot-follower.gid = uidgid;
nix.settings.trusted-users = ["deployerbot-follower"];
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})
];
}