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nixos/deploy-rs: Delete old generations on deployment

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This commit is contained in:
Jack O'Sullivan 2022-06-06 13:09:31 +01:00
parent d2826ec1f4
commit 88d0701689
1 changed files with 25 additions and 8 deletions
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33
nixos/modules/deploy-rs.nix
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@ -6,17 +6,25 @@ let
cfg = config.my.deploy;
keepGensOpt = with lib.types; mkOpt' ints.unsigned 10
"Number of generations to keep when cleaning up old deployments (0 to disable deletion on deployment).";
keepGensSnippet = p: n: optionalString (n > 0) ''
${pkgs.nix}/bin/nix-env -p "${p}" --delete-generations +${toString n}
'';
# Based on https://github.com/serokell/deploy-rs/blob/master/flake.nix
nixosActivate = mode: base: (pkgs.deploy-rs.lib.activate.custom // { dryActivate = "$PROFILE/bin/switch-to-configuration dry-activate"; }) base.config.system.build.toplevel ''
nixosActivate = cfg': base: (pkgs.deploy-rs.lib.activate.custom // { dryActivate = "$PROFILE/bin/switch-to-configuration dry-activate"; }) base.config.system.build.toplevel ''
# work around https://github.com/NixOS/nixpkgs/issues/73404
cd /tmp
$PROFILE/bin/switch-to-configuration ${mode}
"$PROFILE"/bin/switch-to-configuration ${cfg'.mode}
# https://github.com/serokell/deploy-rs/issues/31
${with base.config.boot.loader;
optionalString ((mode == "switch" || mode == "boot") && systemd-boot.enable)
optionalString ((cfg'.mode == "switch" || cfg'.mode == "boot") && systemd-boot.enable)
"sed -i '/^default /d' ${efi.efiSysMountPoint}/loader/loader.conf"}
${keepGensSnippet "$PROFILE" cfg'.keepGenerations}
'';
ctrProfiles = optionalAttrs cfg.generate.containers.enable (mapAttrs' (n: c:
@ -26,8 +34,8 @@ let
{
name = "container-${n}";
value = {
path = pkgs.deploy-rs.lib.activate.custom ctrConfig.my.buildAs.container
(if c.hotReload then ''
path = pkgs.deploy-rs.lib.activate.custom ctrConfig.my.buildAs.container ''
${if c.hotReload then ''
if systemctl show -p StatusText systemd-nspawn@${n} | grep -q "Dummy container"; then
action=restart
else
@ -35,7 +43,12 @@ let
fi
systemctl "$action" systemd-nspawn@${n}
'' else "systemctl restart systemd-nspawn@${n}");
'' else ''
systemctl restart systemd-nspawn@${n}
''}
${keepGensSnippet "$PROFILE" cfg.generate.containers.keepGenerations}
'';
profilePath = "/nix/var/nix/profiles/per-container/${n}/system";
user = "root";
@ -56,8 +69,12 @@ in
system = {
enable = mkBoolOpt' true "Whether to generate a deploy-rs profile for this system's config.";
mode = mkOpt' str "switch" "switch-to-configuration mode.";
keepGenerations = keepGensOpt;
};
containers = {
enable = mkBoolOpt' true "Whether to generate deploy-rs profiles for this system's containers.";
keepGenerations = keepGensOpt;
};
containers.enable = mkBoolOpt' true "Whether to generate deploy-rs profiles for this system's containers.";
};
};
@ -71,7 +88,7 @@ in
profilesOrder = [ "system" ] ++ (attrNames ctrProfiles);
profiles = {
system = mkIf cfg.generate.system.enable {
path = nixosActivate cfg.generate.system.mode { inherit config; };
path = nixosActivate cfg.generate.system { inherit config; };
user = "root";
};