Add and run script for upgrading PostgreSQL of matrix host

The script is a modified version of the script shown in the PostgreSQL
Upgrading section of the NixOS manual. Our version is for upgrading
PostgreSQL 14 to 15.
Basically do steps 1-3 of the section.

Link to the section:
https://nixos.org/manual/nixos/stable/#module-services-postgres-upgrading
This commit is contained in:
June 2023-12-06 00:46:47 +01:00
parent 87e6735662
commit 0944a1749c

View file

@ -14,4 +14,33 @@
dataDir = "/mnt/data/postgresql/${config.services.postgresql.package.psqlSchema}";
};
# Modified version of the script for upgrading PostgreSQL from here:
# https://nixos.org/manual/nixos/stable/#module-services-postgres-upgrading
environment.systemPackages = [
(let
newPostgres = pkgs.postgresql_15;
in pkgs.writeScriptBin "upgrade-pg-cluster" ''
set -eux
systemctl stop matrix-synapse.service
systemctl stop postgresql.service
export NEWDATA="/mnt/data/postgresql/${newPostgres.psqlSchema}"
export NEWBIN="${newPostgres}/bin"
export OLDDATA="${config.services.postgresql.dataDir}"
export OLDBIN="${config.services.postgresql.package}/bin"
install -d -m 0700 -o postgres -g postgres "$NEWDATA"
cd "$NEWDATA"
sudo -u postgres $NEWBIN/initdb -D "$NEWDATA"
sudo -u postgres $NEWBIN/pg_upgrade \
--old-datadir "$OLDDATA" --new-datadir "$NEWDATA" \
--old-bindir $OLDBIN --new-bindir $NEWBIN \
"$@"
'')
];
}