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Restoring the Database from SQL Dump

We generally load a database backup from a JSON file by using the following command.

docker-compose -f local.yml run --rm django python manage.py loaddata backup.json

However, if the JSON file is particularly large (>1.5GB), Docker might struggle with this method. In such cases, you can use SQL dump and restore commands as an alternative.

Steps for Using SQL Dump and Restore

  1. Begin by starting only the PostgreSQL container. This prevents the Django container from making changes while the PostgreSQL container is starting up.
docker-compose -f local.yml up postgres
  1. Find the container ID using docker ps, then enter the PostgreSQL container to execute commands.
$ docker ps
CONTAINER ID   IMAGE                                     COMMAND
23d33f22cc43   sde_indexing_helper_production_postgres   "docker-entrypoint.s…"

$ docker exec -it 23d33f22cc43 bash
  1. Create a connection to the database.
psql -U <POSTGRES_USER> -d <POSTGRES_DB>

Note:

  • For local deployment, refer to the .envs/.local/.postgres file for the POSTGRES_USER and POSTGRES_DB variables.
  • For production deployment, refer to the .envs/.production/.postgres file.
  1. Ensure that the database <POSTGRES_DB> is empty. Here's an example:
sde_indexing_helper-# \c
You are now connected to database "sde_indexing_helper" as user "VnUvMKBSdk...".
sde_indexing_helper-# \dt
Did not find any relations.

If the database is not empty, delete its contents to create a fresh database:

sde_indexing_helper=# \c postgres      //connect to a different database before dropping
You are now connected to database "postgres" as user "VnUvMKBSdk....".
postgres=# DROP DATABASE sde_indexing_helper;
DROP DATABASE
postgres=# CREATE DATABASE sde_indexing_helper;
CREATE DATABASE
  1. Transfer the backup SQL dump (backup.sql) from your local machine to the PostgreSQL container.
docker cp /local/path/backup.sql 23d33f22cc43:/
  1. Import the SQL dump into the PostgreSQL container.
psql -U <POSTGRES_USER> -d <POSTGRES_DB> -f backup.sql

Note: To create a SQL dump of your PostgreSQL database, use the following command:

pg_dump -U <POSTGRES_USER> -W -F p -f backup.sql <POSTGRES_DB>
  1. Bring up all containers at once, and create a superuser account for logging in.
docker-compose -f local.yml up
docker-compose -f local.yml run --rm django python manage.py createsuperuser
  1. Log in to the SDE Indexing Helper frontend to ensure that all data has been correctly populated in the UI.