159
From reddit selfhosted: What do you wish you knew from the start
(www.reddit.com)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 30 Jul 2024
159 points (92.5% liked)
Selfhosted
40708 readers
459 users here now
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.
Rules:
-
Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.
-
No spam posting.
-
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.
-
Don't duplicate the full text of your blog or github here. Just post the link for folks to click.
-
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
-
No trolling.
Resources:
- selfh.st Newsletter and index of selfhosted software and apps
- awesome-selfhosted software
- awesome-sysadmin resources
- Self-Hosted Podcast from Jupiter Broadcasting
Any issues on the community? Report it using the report flag.
Questions? DM the mods!
founded 2 years ago
MODERATORS
The big thing for #2 would be to seperate out what you actually need vs what people keep recommending.
General guidance is useful, but there's a lot of 'You need ZFS!' and 'You should use K8s!' and 'Use X software!'
My life got immensely easier when I figured out I did not need any features ZFS brought to the table, and I did not need any of the features K8s brought to the table, and that less is absolutely more. I ended up doing MergerFS with a proper offsite backup method because, well, it's shockingly low-complexity.
And I ended up doing Docker with a bunch of compose files and bind mounts, because it's shockingly low-complexity. And it's just running on Debian, instead of some OS that has a couple of layers of additional software to make things "easier" because, again, it's low-complexity.
I can re-deploy the entire stack on new hardware in about ~10 minutes (I've tested this a few times just to make sure my backup scripts work), and there's basically zero vendor tie-in or dependencies that you'd have to get working first since it's just a pile of tarballs and packages from the distro's package manager on, well, ANY distro.
IMO a homelab for learning and a server that you're self-hosting services on really aren't the same thing and maybe shouldn't be treated that way, if you can swing it.
I'd rather my password manager or jellyfin or my peertube instance or whatever not be relying on a tech stack I don't entirely understand and might not be able to easily fix if it breaks.
I guess a lot of it is new to doing this vs greybeard split, since the longer I've done sysadmin work the less I care about the cool new thing and have a preference for the old, stable, documented, bugfixed, supported, and with a clear roadmap software.
I should probably get a job doing sysadmin work for a bank, lmao.
This is going to be a bit of my grumpy-greybeard, but again: if you're learning, then something like Docker and docker-compose is much simpler and less prone to fuckups than a bunch of K8s.
If you don't know ANYTHING about what you're doing, starting with the simplest tools and then deciding if you want to learn the more complicated ones is probably a less insane path than jumping right into the configuration-as-code DevOps pipeline.
And, at that point, you should have your "production" and "testing" environments set up in such a way they won't eat each other when you do an oops.
I have made that migration myself going from a Raspberry PI 4 to a n100 based NAS. It was 10 minutes for the software stack as you said This not taking into account media migration which was done on the background over a few hours on WiFi (I had everything on an external hard drive at the time).
That last part is the only thing I would change about my self hosting solution. Yes, the NAS has a nice form factor, is power efficient and has so far been very optimal for my needs (no lag like rpi4), however I have seen they don’t really sell motherboard or parts to repair them. They want you to replace it with another one. Reason 2 on the same is vendor lock in. Depending on the options you select when creating the storage groups/pools (whatever they are called), you could be stuck needing to get something from the same vendor to read your data if the device stops working but the disks are salvageable. Reason 3 is they’ve had security incidents so a lot of the “features” I would not recommend using ever to avoid exposing your data to ransomware over the internet. I don’t trust their competitors either. I know how commercial software is made with the smallest amount of care for security best practices.
Yeah, I just use plain boring desktop hardware. (Oh no! I'm experiencing data corruption due to the lack of ECC!) It's cheap, it's available, it's trivial to upgrade and expand, and there's very few little gotchas in there: you get pretty much exactly what it looks like you get.
Also nice is that that you can have a Ship of Theseus NAS by upgrading what needs upgrading as you go along and aren't tied into entire platform swaps unless it makes sense - my last big rebuild was 3 years ago, but this is basically a 10 year old NAS at this point.
So did you buy ecc ram?
Can you elaborate on how your backup script re-deploys on new hardware? Sounds very nice to have.
It's a really simple script.
Everything is deployed with a docker compose, and all the docker volume data are bind mounts and, for example, a Jellyfin install would have everything in /stacks/jellyfin.
The backup script makes a tarball of each service individually (and stops the stack if there's anything in there doing database things or anything else that might end up being inconsistent by just archiving the filesystem), and uploads them to a S3 storage provider AND burns them to a BluRay.
The recovery script does the opposite: it downloads and unarchives the data.
As long as you're on Linux and have Docker, it should just magically work.
I see! Thanks, will try to back up my docker compose services this way.
If you write the script yourself, just make sure you test it a couple of times, and preferably with different datasets from different runs.
I found some edgecase stuff that would have prevented a restore even after I had tested it successfully (some permission issues due to changes in containers and whatnot were resulting in less than the expected data being archived and restored) a couple of times.
btrfs with its send/receive (incremental fs-level backups) is already stable enough for mostly everything (just has some issues with raid 5/6), and is much more performant than zfs. And it is also in the linux kernel tree (quite hugely useful). Of course, if more zfs-like functionality is what you look for.
"Already stable enough"
My only experience with btrfs was when trying out Opensuse Tumbleweed. Within a couple days my home partition was busted, next time it was another partition. No idea if the problems could be fixed as these were fairly new installations to give Opensuse a try and I couldn't be bothered to fix a system that's troubling me from the very beginning.
Between all the options that just work (TM), btrfs is the one I've learned to stay away from.
EDIT: that was four or five years ago
And I’ve been using it for ~~eight~~ six of those 15 in RAID 5/6 with zero issues, so YMMW I guess. Sorry you experienced problems.
Honestly it's not; BTRFS has been in my 'that's neat, but it's still got a non-zero chance of deciding to light everything on fire because it's bored' list for, uh, a decade now?
The NAS build is old enough to more or less predate BTRFS being usable (closing in on a decade since I did the initial OS install, jeez) and none of the features matter for what I'm storing: if every drive in my NAS died today, I'd be very annoyed for a couple of hours during the rebuild, and would lose terrabytes of linux ISOs that I can just download again, if I wanted to use Jellyfin to install them a 2nd time. (Any data I care about is pulled offsite at least once a day, so I've got pretty comprehensive backups minus the ISOs.)
I know EXT4 and mergerfs and snapraid are not cool, or have shiny features, but I've also had zero problems with them over the last decade, even between Ubuntu upgrades (16.04, 18.04, 20.04, 22.04) and hardware platform upgrades (6600k, 8700k, 10950k) and the entire replacement of all the system drives (hdd -> ssd -> nvme) and the expansion of and replacement of dead HDDs, of varying sizes (4tb drives to 8tb drives to 16tb drives to some 20tb drives).
It all just... worked, and at no point was I concerned about the filesystem not working if I replaced or upgraded or changed something, which is not something ZFS or BTRFS would have guaranteed during that same time window.
IMHO 99% of the time btrfs features are used as a band-aid for things that would be much better done otherwise. Generally by using a stable distro and a decent backup solution (like Debian + Borg). And you get to use a truly stable, proven, boring fs ike ext4 or xfs.
Stable yes, but no protection from bitrot, and the journal of ext4 is the band aid, instead of a cow fs like zfs or btrfs.
You can protect important data with backups, which you should do anyway, and in practice I feel like the added complexity of BTRFS and ZFS is not worth the COW.
BTRFS is cool but they tried to cram way too much too fast into it and it added a ton of complexity and it's still not 100% done after all these years. A COW mode for ext4 would have been adopted much faster.