113 lines
3.1 KiB
ReStructuredText
113 lines
3.1 KiB
ReStructuredText
.. highlight:: sh
|
|
|
|
Preparation
|
|
======================
|
|
|
|
.. contents:: Table of Contents
|
|
:local:
|
|
|
|
#. Download `Minimal ISO image
|
|
<https://channels.nixos.org/nixos-21.11/latest-nixos-minimal-x86_64-linux.iso>`__ and boot from it.
|
|
|
|
#. Connect to network. See `NixOS manual <https://nixos.org/manual/nixos/stable/index.html#sec-installation-booting>`__.
|
|
|
|
#. SSH server is enabled by default. To connect, set root password with::
|
|
|
|
sudo passwd
|
|
|
|
#. Connect from another computer::
|
|
|
|
ssh root@192.168.1.19
|
|
|
|
#. Unique pool suffix. ZFS expects pool names to be
|
|
unique, therefore it's recommended to create
|
|
pools with a unique suffix::
|
|
|
|
INST_UUID=$(dd if=/dev/urandom bs=1 count=100 2>/dev/null | tr -dc 'a-z0-9' | cut -c-6)
|
|
|
|
#. Identify this installation in ZFS filesystem path::
|
|
|
|
INST_ID=nixos
|
|
|
|
#. Root on ZFS configuration file name::
|
|
|
|
INST_CONFIG_FILE='zfs.nix'
|
|
|
|
#. Target disk
|
|
|
|
List available disks with::
|
|
|
|
ls /dev/disk/by-id/*
|
|
|
|
If using virtio as disk bus, use
|
|
``/dev/disk/by-path/*``.
|
|
|
|
Declare disk array::
|
|
|
|
DISK='/dev/disk/by-id/ata-FOO /dev/disk/by-id/nvme-BAR'
|
|
|
|
For single disk installation, use::
|
|
|
|
DISK='/dev/disk/by-id/disk1'
|
|
|
|
#. Choose a primary disk. This disk will be used
|
|
for primary EFI partition, default to
|
|
first disk in the array::
|
|
|
|
INST_PRIMARY_DISK=$(echo $DISK | cut -f1 -d\ )
|
|
|
|
#. Set vdev topology, possible values are:
|
|
|
|
- (not set, single disk or striped; no redundancy)
|
|
- mirror
|
|
- raidz1
|
|
- raidz2
|
|
- raidz3
|
|
|
|
::
|
|
|
|
INST_VDEV=
|
|
|
|
This will create a single vdev with the topology of your choice.
|
|
It is also possible to manually create a pool with multiple vdevs, such as::
|
|
|
|
zpool create --options \
|
|
poolName \
|
|
mirror sda sdb \
|
|
raidz2 sdc ... \
|
|
raidz3 sde ... \
|
|
spare sdf ...
|
|
|
|
Notice the cost of parity when using RAID-Z. See
|
|
`here <https://www.delphix.com/blog/delphix-engineering/zfs-raidz-stripe-width-or-how-i-learned-stop-worrying-and-love-raidz>`__
|
|
and `here <https://docs.google.com/spreadsheets/d/1tf4qx1aMJp8Lo_R6gpT689wTjHv6CGVElrPqTA0w_ZY/>`__.
|
|
|
|
For boot pool, which must be readable by GRUB, mirrored vdev should always be used for maximum redundancy.
|
|
This guide will use mirrored bpool for multi-disk setup.
|
|
|
|
Refer to `zpoolconcepts <https://openzfs.github.io/openzfs-docs/man/7/zpoolconcepts.7.html>`__
|
|
and `zpool-create <https://openzfs.github.io/openzfs-docs/man/8/zpool-create.8.html>`__
|
|
man pages for details.
|
|
|
|
#. Set partition size:
|
|
|
|
Set ESP size::
|
|
|
|
INST_PARTSIZE_ESP=2 # in GB
|
|
|
|
Set boot pool size. To avoid running out of space while using
|
|
boot environments, the minimum is 4GB. Adjust the size if you
|
|
intend to use multiple kernel/distros::
|
|
|
|
INST_PARTSIZE_BPOOL=4
|
|
|
|
Set swap size. It's `recommended <https://chrisdown.name/2018/01/02/in-defence-of-swap.html>`__
|
|
to setup a swap partition. If you intend to use hibernation,
|
|
the minimum should be no less than RAM size. Skip if swap is not needed::
|
|
|
|
INST_PARTSIZE_SWAP=8
|
|
|
|
Root pool size, use all remaining disk space if not set::
|
|
|
|
INST_PARTSIZE_RPOOL=
|