97 lines
3.5 KiB
Nix
97 lines
3.5 KiB
Nix
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{ config, lib, libS, pkgs, ... }:
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# NOTE: requires https://github.com/NixOS/nixpkgs/pull/257503 because of new usage of extraPlugins
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let
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cfg = config.services.postgresql;
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cfgu = config.services.postgresql.upgrade;
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in
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{
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options.services.postgresql = {
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upgrade = {
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enable = libS.mkOpinionatedOption "install the upgrade-pg-cluster script to update postgres.";
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extraArgs = lib.mkOption {
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type = with lib.types; listOf str;
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default = [ "--link" "--jobs=$(nproc)" ];
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description = lib.mdDoc "Extra arguments to pass to pg_upgrade. See https://www.postgresql.org/docs/current/pgupgrade.html for doc.";
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};
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newPackage = (lib.mkPackageOptionMD pkgs "postgresql" {
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default = [ "postgresql_16" ];
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}) // {
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description = lib.mdDoc ''
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The postgres package to which should be updated.
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After running upgrade-pg-cluster this must be set to services.postgresql.package to complete the update.
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'';
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};
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stopServices = lib.mkOption {
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type = with lib.types; listOf str;
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default = [ ];
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example = [ "hedgedoc" "hydra" "nginx" ];
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description = lib.mdDoc "Systemd services to stop when upgrade is started.";
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};
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};
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recommendedDefaults = libS.mkOpinionatedOption "set recommended default settings";
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};
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config = lib.mkIf cfg.enable {
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environment.systemPackages = lib.optional cfgu.enable (
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let
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# conditions copied from nixos/modules/services/databases/postgresql.nix
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newPackage = if cfg.enableJIT && !cfgu.newPackage.jitSupport then cfgu.newPackage.withJIT else cfg.newPackage;
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newData = "/var/lib/postgresql/${cfgu.newPackage.psqlSchema}";
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newBin = "${if cfg.extraPlugins == [] then cfgu.newPackage else cfgu.newPackage.withPackages cfg.extraPlugins}/bin";
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oldPackage = if cfg.enableJIT && !cfg.package.jitSupport then cfg.package.withJIT else cfg.package;
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oldData = config.services.postgresql.dataDir;
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oldBin = "${if cfg.extraPlugins == [] then oldPackage else oldPackage.withPackages cfg.extraPlugins}/bin";
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in
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pkgs.writeScriptBin "upgrade-pg-cluster" /* bash */ ''
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set -eu
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echo "Current version: ${cfg.package.version}"
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echo "Update version: ${cfgu.newPackage.version}"
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if [[ ${cfgu.newPackage.version} == ${cfg.package.version} ]]; then
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echo "There is no major postgres update available."
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exit 2
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fi
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systemctl stop postgresql ${lib.concatStringsSep " " cfgu.stopServices}
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install -d -m 0700 -o postgres -g postgres "${newData}"
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cd "${newData}"
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sudo -u postgres "${newBin}/initdb" -D "${newData}"
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sudo -u postgres "${newBin}/pg_upgrade" \
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--old-datadir "${oldData}" --new-datadir "${newData}" \
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--old-bindir ${oldBin} --new-bindir ${newBin} \
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${lib.concatStringsSep " " cfgu.extraArgs} \
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"$@"
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echo "
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Run the following commands after setting:
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services.postgresql.package = pkgs.postgresql_${lib.versions.major cfgu.newPackage.version}
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sudo -u postgres vacuumdb --all --analyze-in-stages
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${newData}/delete_old_cluster.sh
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"
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''
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);
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services = {
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postgresql.enableJIT = lib.mkIf cfg.recommendedDefaults true;
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postgresqlBackup = lib.mkIf cfg.recommendedDefaults {
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compression = "zstd";
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compressionLevel = 9;
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pgdumpOptions = "--create --clean";
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};
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};
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};
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}
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