mirror of https://github.com/LemmyNet/lemmy.git
45 lines
1.4 KiB
Markdown
45 lines
1.4 KiB
Markdown
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# Backup and Restore Guide
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## Docker and Ansible
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When using docker or ansible, there should be a `volumes` folder, which contains both the database, and all the pictures. Copy this folder to the new instance to restore your data.
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### Incremental Database backup
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To incrementally backup the DB to an `.sql` file, you can run:
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```bash
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docker exec -t FOLDERNAME_postgres_1 pg_dumpall -c -U lemmy > lemmy_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql
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```
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### A Sample backup script
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```bash
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#!/bin/sh
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# DB Backup
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ssh MY_USER@MY_IP "docker exec -t FOLDERNAME_postgres_1 pg_dumpall -c -U lemmy" > ~/BACKUP_LOCATION/INSTANCE_NAME_dump_`date +%Y-%m-%d"_"%H_%M_%S`.sql
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# Volumes folder Backup
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rsync -avP -zz --rsync-path="sudo rsync" MY_USER@MY_IP:/LEMMY_LOCATION/volumes ~/BACKUP_LOCATION/FOLDERNAME
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```
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### Restoring the DB
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If you need to restore from a `pg_dumpall` file, you need to first clear out your existing database
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```bash
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# Drop the existing DB
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docker exec -i FOLDERNAME_postgres_1 psql -U lemmy -c "DROP SCHEMA public CASCADE; CREATE SCHEMA public;"
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# Restore from the .sql backup
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cat db_dump.sql | docker exec -i FOLDERNAME_postgres_1 psql -U lemmy # restores the db
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# This also might be necessary when doing a db import with a different password.
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docker exec -i FOLDERNAME_postgres_1 psql -U lemmy -c "alter user lemmy with password 'bleh'"
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```
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## More resources
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- https://stackoverflow.com/questions/24718706/backup-restore-a-dockerized-postgresql-database
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