So, I moved my nextcloud directory from a local SATA drive to a NFS mount from a nvme array on a 10G network

“I just need to change /docker/nextcloud to /mnt/nfs/nextcloud in the docker-compose.yml, what’s the issue, i do it live” - i tell myself

So i stop the container, copy /docker/nextcloud to /mnt/nfs/nextcloud, then edit the docker-compose.yml… and… because I’m doing it during a phone call without paying too much attention i change the main directory to /docker

I rebuild the container and I immediately hear a flood of telegram notifications from my uptime-kuma bot… oh oh…

Looks like the nextcloud docker image has an initialization script that if it doesn’t find the files in the directory, it will delete everything and install a fresh copy of nextcloud… so it deleted everything on my server

Luckily i had a very recent full borg backup and i’m restoring it (i kinda love-hate borg, i always forget the restore commands when in panic and the docs are a bit cryptic for me)

Lessons learned:

  1. always double check everything

  2. offsite backups are a must (if i accidentally wrote / as path, i would have lost also the borg backups!)

  3. offsite backups should not be permanently mounted, otherwise they would have been wiped as well

  4. learn how to use and schedule filesystem snapshots, so the recovery wouldn’t take ages like it’s taking right now (2+ hours and i’m not even half way…)

  • 4am@lemm.eeEnglish
    81·
    1 year ago
    1. Always run prod services in a VM or LXC
    2. Snapshot before touching anything

    Fucking up in EZ mode just becomes an hour wasted.

    Having full backups is good too, of course.

    • Pete90@feddit.deEnglish
      1·
      1 year ago

      I’m currently setting up proxmox just for that. Since I’m still quite new to self hosting, I fuck up from time to time. Deleted my root file system once. Updated Nginx proxy manager and took down my services with it. I once fucked up iptables, scary stuff.

      In the future, it’ll be one click and everything works again. It’s so easy on novices, once you get everything going.

    • Nik282000@lemmy.caEnglish
      1·
      1 year ago

      I ham-fistedly use LXC to keep my services separate and out of dependancy hell, but would you go as far as putting docker run services in them as well just to keep them away from the host?