docker/scripts/postgres-migrate

57 lines
1.9 KiB
Bash
Executable File

#!/bin/bash -e
OLD_DATA_DIR=$(realpath "$1")
NEW_DATA_DIR=$(realpath "$2")
NEW_POSTGRES_VERSION=$3
if [ -d "$NEW_DATA_DIR" ]; then
echo "new postgres data directory $2 already exists. this is not expected"
exit 1
fi
OLD_PG_VERSION=$(cat "$OLD_DATA_DIR/PG_VERSION")
echo spin up a temporary postgres instance on $OLD_DATA_DIR
TEMP_CONTAINER_ID=$(docker run --detach --rm "-v=$OLD_DATA_DIR:/var/lib/postgresql/data" -e POSTGRES_HOST_AUTH_METHOD=trust postgres:$OLD_PG_VERSION-alpine)
until docker exec $TEMP_CONTAINER_ID psql -U postgres -c "select 1" > /dev/null 2>&1; do
echo "Waiting for postgres server..."
sleep 1
done
echo "find old greenlight database..."
if docker exec $TEMP_CONTAINER_ID psql -U postgres -lqt | cut -d \| -f 1 | grep greenlight-v3; then
OLD_DATABASE=greenlight-v3
elif docker exec $TEMP_CONTAINER_ID psql -U postgres -lqt | cut -d \| -f 1 | grep greenlight; then
OLD_DATABASE=greenlight
fi
echo "old database is called $OLD_DATABASE"
echo ""
echo "dumping data from old databse..."
GREENLIGHT_DUMP=$(mktemp)
docker exec $TEMP_CONTAINER_ID pg_dump -U postgres $OLD_DATABASE > $GREENLIGHT_DUMP
docker stop $TEMP_CONTAINER_ID
echo spin up a temporary postgres instance on $NEW_DATA_DIR
TEMP_CONTAINER_ID=$(docker run --detach --rm "-v=$NEW_DATA_DIR:/var/lib/postgresql/data" -e POSTGRES_HOST_AUTH_METHOD=trust postgres:$NEW_POSTGRES_VERSION-alpine)
until docker exec $TEMP_CONTAINER_ID psql -U postgres -c "select 1" > /dev/null 2>&1; do
echo "Waiting for postgres server..."
sleep 1
done
echo "create all databases..."
for database in "bbb_graphql" "hasura_app" "greenlight"; do
echo "creating $database"
docker exec $TEMP_CONTAINER_ID psql -U postgres -c "CREATE DATABASE $database;" -c "GRANT ALL PRIVILEGES ON DATABASE $database TO postgres;"
done
echo "restoring greenlight from dump..."
cat $GREENLIGHT_DUMP | docker exec -i $TEMP_CONTAINER_ID psql -U postgres greenlight
docker stop $TEMP_CONTAINER_ID