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Saverio Miroddi 2020-04-26 22:46:10 +02:00
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@ -28,14 +28,22 @@ RAID-1 (mirroring) is supported, with any arbitrary number of disks; the boot an
It's fairly easy to extend the program to support other Debian-based operating systems (e.g. older/newer Ubuntu's, etc.) - the project is (very) open to feature requests.
## Advantages over the Ubuntu built-in installer
## Comparison with Ubuntu built-in installer
With Ubuntu 19.10, Canonical released an experimental ZFS installer. The advantages of this project over this installer are:
As of 20.04, Canonical makes available an experimental ZFS installer on Ubuntu Desktop.
1. on production systems, it's undesirable to use a non-LTS version;
2. the experimental Ubuntu installer is unconfigurable; it generates a fixed setup.
The advantages of this project over the Ubuntu installer are:
additionally, as explained in the previous section, the script can be easily adapted for other operating systems.
1. it supports pools configuration;
2. it allows customization of the disks setup (including mirroring);
3. it supports additional features (e.g. encryption);
4. it supports many more operating systems;
5. it supports unattended installations, via custom scripts;
6. it's easy to extend.
The disadvantages are:
1. the Ubuntu installer has a more sophisticated filesystem layout - it separates base directories into different ZFS filesystems (this is planned to be implemented in the ZFS installer as well).
## Instructions
@ -56,12 +64,12 @@ Ubuntu Server requires a slightly different execution procedure:
the rest is the same as the generic procedure.
### Issues/unsupported systems
Due to a current problem with the zpool expansion, 12 GiB of empty space are left at the end of each disk.
### Unsupported systems/Issues
The Ubuntu Server alternate (non-live) version is not supported, as it's based on the Busybox environment, which lacks several tools used in the installer (apt, rsync...).
The installer itself can run over SSH (\[S\]Ubiquity of course needs to be still run in the desktop environment, unless a custom script is provided), however, GNU Screen sessions may break, due to the virtual filesystems rebinding/chrooting. This is not an issue with the ZFS installer; it's a necessary step of the destination configuration.
### Unattended installations
The program supports unattended installation, via environment variables. The program built-in help explains all the options: