33 lines
1.5 KiB
Markdown
33 lines
1.5 KiB
Markdown
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# NixOS server
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This is my homeserver running NixOS. It makes heavy use of containers in order to organize processes.
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## Containers
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The file `host.nix` has a whole load of code which basically allows one to specify services in the `service/` directiory, which are then ran in seperate NixOS containers.
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## Disk setup
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* root filesystem
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- The root FS is on a 128GB SATA SSD running EXT4. (also used for vfat boot partiotion)
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- Nothing fancy, just reliable and slightly faster root.
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* container storage
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- The container storage is a ZFS pool
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- Its running on a mirror configuration with 1TB disk pairs (currently one pair)
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- It has a blocksize of 1M to accomodate serving large media files (FLAC music, 4K movies, series, etc). This is deemed more important than DB performance in this application
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- It is compressed using ZFS standard LZ4 compression to save space
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- A 7 day window of snapshots are kept on the drive
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- A lot of inspiration where taken from the following sources
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- Official OpenZFS docs
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- https://jrs-s.net/2018/08/17/zfs-tuning-cheat-sheet/
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- https://wiki.nixos.org/wiki/ZFS
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- https://jrs-s.net/2015/02/06/zfs-you-should-use-mirror-vdevs-not-raidz/
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- https://openzfs.github.io/openzfs-docs/Getting%20Started/NixOS/index.html
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* backups
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- Backups are made to a second pool on an external drive
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- All snapshots are sent over to this drive, and they are not deleted
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- It runs slower GZ based compression to minimize space taken
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- TODO: what do I do when this is full?
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