lemmy/scripts/postgres_12_to_14_upgrade.sh

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##!/bin/sh
set -e
## This script upgrades the postgres from version 12 to 14
## Make sure everything is started
sudo docker-compose start
# Export the DB
echo "Exporting the Database to 12_14.dump.sql ..."
sudo docker-compose exec -T postgres pg_dumpall -c -U lemmy > 12_14_dump.sql
echo "Done."
# Stop everything
sudo docker-compose stop
sleep 10s
# Delete the folder
echo "Removing the old postgres folder"
sudo rm -rf volumes/postgres
# Change the version in your docker-compose.yml
echo "Updating docker-compose to use postgres version 14."
sed -i "s/postgres:12-alpine/postgres:14-alpine/" ./docker-compose.yml
# Start up postgres
echo "Starting up new postgres..."
sudo docker-compose up -d postgres
# Sleep for a bit so it can start up, build the new folders
sleep 20s
# Import the DB
echo "Importing the database...."
cat 12_14_dump.sql | sudo docker-compose exec -T postgres psql -U lemmy
echo "Done."
POSTGRES_PASSWORD=$(grep "POSTGRES_PASSWORD" ./docker-compose.yml | cut -d"=" -f2)
# Fix weird password issue with postgres 14
echo "Fixing a weird password issue with postgres 14"
sudo docker-compose exec -T postgres psql -U lemmy -c "alter user lemmy with password '$POSTGRES_PASSWORD'"
sudo docker-compose restart postgres
# Just in case
sudo chown -R 991:991 volumes/pictrs
# Start up the rest of lemmy
echo "Starting up lemmy"
sudo docker-compose up -d
# Delete the DB Dump? Probably safe to keep it
echo "A copy of your old database is at 12_14.dump.sql . You can delete this file if the upgrade went smoothly."