49 lines
1.4 KiB
Nix
49 lines
1.4 KiB
Nix
# taken from @jtojnar
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{
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config,
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lib,
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pkgs,
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...
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}: let
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inherit (lib) types mkOption;
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cfg = config.server.infra.postgresql;
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in {
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options = {
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server.infra.postgresql = {
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upgradeTargetPackage = mkOption {
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type = types.nullOr types.package;
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default = null;
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description = "PostgreSQL package that we want to upgrade to. When set, an update script will be installed.";
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};
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};
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};
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config = {
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# https://nixos.org/manual/nixos/unstable/#module-services-postgres-upgrading
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environment.systemPackages = lib.mkIf (cfg.upgradeTargetPackage != null) [
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(pkgs.writeScriptBin "upgrade-pg-cluster" ''
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set -eux
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# XXX it's perhaps advisable to stop all services that depend on postgresql
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systemctl stop postgresql
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export NEWDATA="/var/lib/postgresql/${cfg.upgradeTargetPackage.psqlSchema}"
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export NEWBIN="${cfg.upgradeTargetPackage}/bin"
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export OLDDATA="${config.services.postgresql.dataDir}"
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export OLDBIN="${config.services.postgresql.package}/bin"
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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 $NEWBIN \
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"$@"
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'')
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];
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};
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}
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