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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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If I self host a Lemmy instance for just myself and maybe a few friends are there any risks? (lemmy.world)

submitted 1 year ago by [email protected] to c/[email protected]

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Looking to maybe self host my own instance, I'm still learning about the fediverse. If a different instance that I federate with hosts something illegal are there risks to me? Is anything from other instances hosted on my server like a copy of it? Or would I only end up hosting things my users post? I'm paranoid and sorry if this is a silly question.

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[–] [email protected] 6 points 1 year ago (14 children)

The activity table is also used to deduplicate incoming federation data, so instead of truncating it, I'd suggest deleting rows after a certain amount of time.

For my personal instance, I set up a cron to delete entries older than 3 days, and my db is only ~500MB with a few weeks of content! I also haven't seen any duplicated posts or comments. Even with Lemmy's retries, 3 days seems to be long enough before dropping rows from that table.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (4 children)

Can you help me set this up also or share the script I would run to do this? Many thanks.

[–] [email protected] 1 points 1 year ago (3 children)

Sure! My script will look a little different since I'm hosting Lemmy in Kubernetes, but basically you will want to run the following command hourly. Make sure to replace the values for database, username, and password.

PGPASSWORD=password psql --dbname=database --username=username --command="DELETE FROM activity WHERE published < NOW() - INTERVAL '3 days';"

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