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Adding a compressed / gzip version for backup and restore. (#156)

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Dessalines 2023-01-19 21:28:36 -05:00 committed by GitHub
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15
src/en/administration/backup_and_restore.md
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@ -6,17 +6,18 @@ When using docker or ansible, there should be a `volumes` folder, which contains
### Incremental Database backup
To incrementally backup the DB to an `.sql` file, you can run:
To incrementally backup the DB to an `.sql.gz` file, you can run:
```bash
docker-compose exec postgres pg_dumpall -c -U lemmy > lemmy_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql
docker-compose exec postgres pg_dumpall -c -U lemmy | gzip > lemmy_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql.gz
```
### A Sample backup script
```bash
#!/bin/sh
# DB Backup
ssh MY_USER@MY_IP "docker-compose exec postgres pg_dumpall -c -U lemmy" > ~/BACKUP_LOCATION/INSTANCE_NAME_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql
ssh MY_USER@MY_IP "docker-compose exec postgres pg_dumpall -c -U lemmy" | gzip > ~/BACKUP_LOCATION/INSTANCE_NAME_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql.gz
# Volumes folder Backup
rsync -avP -zz --rsync-path="sudo rsync" MY_USER@MY_IP:/LEMMY_LOCATION/volumes ~/BACKUP_LOCATION/FOLDERNAME
@ -30,8 +31,8 @@ If you need to restore from a `pg_dumpall` file, you need to first clear out you
# Drop the existing DB
docker exec -i FOLDERNAME_postgres_1 psql -U lemmy -c "DROP SCHEMA public CASCADE; CREATE SCHEMA public;"
# Restore from the .sql backup
cat db_dump.sql | docker exec -i FOLDERNAME_postgres_1 psql -U lemmy # restores the db
# Restore from the .sql.gz backup
gunzip < db_dump.sql | docker exec -i FOLDERNAME_postgres_1 psql -U lemmy # restores the db
# This also might be necessary when doing a db import with a different password.
docker exec -i FOLDERNAME_postgres_1 psql -U lemmy -c "alter user lemmy with password 'bleh'"
@ -41,7 +42,7 @@ docker exec -i FOLDERNAME_postgres_1 psql -U lemmy -c "alter user lemmy with pas
If you haven't federated yet, you can change your domain name in the DB. **Warning: do not do this after you've federated, or it will break federation.**
Get into `psql` for your docker:
Get into `psql` for your docker:
`docker-compose exec postgres psql -U lemmy`
@ -73,5 +74,3 @@ update community set shared_inbox_url = replace (shared_inbox_url, 'old_domain',
## More resources
- https://stackoverflow.com/questions/24718706/backup-restore-a-dockerized-postgresql-database