Everything lost on powering down

Henry Wright

Here's an interesting one: I have NodeBB set up on localhost mainly to test some minor things. (using Redis, Nginx on Ubuntu 14.04). It's a brand new install I've had running for a couple of days.

I powered off my laptop, went to have dinner and just fired everything up again to find all of my admin settings gone along with all posts, topics and categories I created.

I just run ./nodebb setup again so am back up again (minus all my test data) but any idea why this might have happened?

Arc

Well, that's terrifying.

Excuse me while I never reboot my server again.

Henry Wright

@Arc had it have been production, I'd have had backups. Being this was my dev site, nothing really lost.

drew

No Redis persistence
It's an in-memory key:value store. If you don't persist it with dumps or AOF or both you'll nuke everything on reboot of redis.

Hope that helps.

Henry Wright

@drew Thanks for the heads up! Glad this happened now. I can read up on it and hopefully put something in place.

julian

Now technically, by default, Redis will persist to disk, but any number of reasons might cause it to stop working:

Redis installed manually with custom config file that turns persistence off
Not enough memory (!!)
Dump file set to or located in file/directory that is non-writable

Either way, Redis will output warnings on startup if it cannot write to the dump.rdb file, so check Redis logs!