Ubuntu: Add instructions for mirroring GRUB
Richard Laager
parent
c9e6eb7531
commit
78b3a1e417
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@ -123,7 +123,7 @@ Choose one of the following options:
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* Your passphrase will likely be the weakest link. Choose wisely. See [section 5 of the cryptsetup FAQ](https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions#5-security-aspects) for guidance.
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**Hints:**
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* The root pool does not have to be a single disk; it can have a mirror or raidz topology. In that case, repeat the partitioning commands for all the disks which will be part of the pool. Then, create the pool using `zpool create ... rpool mirror /dev/disk/by-id/scsi-SATA_disk1-part1 /dev/disk/by-id/scsi-SATA_disk2-part1` (or replace `mirror` with `raidz`, `raidz2`, or `raidz3` and list the partitions from additional disks). Later, install GRUB to all the disks. This is trivial for MBR booting; the UEFI equivalent is currently left as an exercise for the reader.
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* The root pool does not have to be a single disk; it can have a mirror or raidz topology. In that case, repeat the partitioning commands for all the disks which will be part of the pool. Then, create the pool using `zpool create ... rpool mirror /dev/disk/by-id/scsi-SATA_disk1-part1 /dev/disk/by-id/scsi-SATA_disk2-part1` (or replace `mirror` with `raidz`, `raidz2`, or `raidz3` and list the partitions from additional disks).
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* The pool name is arbitrary. On systems that can automatically install to ZFS, the root pool is named `rpool` by default. If you work with multiple systems, it might be wise to use `hostname`, `hostname0`, or `hostname-1` instead.
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## Step 3: System Installation
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@ -287,7 +287,7 @@ Install GRUB to the disk(s), not the partition(s).
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# mkdir /boot/efi
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# echo PARTUUID=$(blkid -s PARTUUID -o value \
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/dev/disk/by-id/scsi-SATA_disk1-part3) \
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/boot/efi vfat defaults 0 1 >> /etc/fstab
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/boot/efi vfat nofail,x-systemd.device-timeout=1 0 1 >> /etc/fstab
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# mount /boot/efi
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# apt install --yes grub-efi-amd64
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@ -415,6 +415,28 @@ The temporary name for the dataset is required to work-around [a bug in ecryptfs
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# usermod -a -G adm,cdrom,dip,lpadmin,plugdev,sambashare,sudo YOURUSERNAME
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6.8 Mirror GRUB
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If you installed to multiple disks, install GRUB on the additional disks:
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6.8a For legacy (MBR) booting:
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# dpkg-reconfigure grub-pc
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Hit enter until you get to the device selection screen.
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Select (using the space bar) all of the disks (not partitions) in your pool.
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6.8b UEFI
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# umount /boot/efi
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For the second and subsequent disks (increment ubuntu-2 to -3, etc.):
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# dd if=/dev/disk/by-id/scsi-SATA_disk1-part3 \
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of=/dev/disk/by-id/scsi-SATA_disk2-part3
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# efibootmgr -c -g -d /dev/disk/by-id/scsi-SATA_disk2 \
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-p 3 -L "ubuntu-2" -l '\EFI\Ubuntu\grubx64.efi'
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# mount /boot/efi
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## Step 7: Configure Swap
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7.1 Create a volume dataset (zvol) for use as a swap device:
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@ -121,7 +121,7 @@ Choose one of the following options:
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* Your passphrase will likely be the weakest link. Choose wisely. See [section 5 of the cryptsetup FAQ](https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions#5-security-aspects) for guidance.
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**Hints:**
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* The root pool does not have to be a single disk; it can have a mirror or raidz topology. In that case, repeat the partitioning commands for all the disks which will be part of the pool. Then, create the pool using `zpool create ... rpool mirror /dev/disk/by-id/scsi-SATA_disk1-part1 /dev/disk/by-id/scsi-SATA_disk2-part1` (or replace `mirror` with `raidz`, `raidz2`, or `raidz3` and list the partitions from additional disks). Later, install GRUB to all the disks. This is trivial for MBR booting; the UEFI equivalent is currently left as an exercise for the reader.
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* The root pool does not have to be a single disk; it can have a mirror or raidz topology. In that case, repeat the partitioning commands for all the disks which will be part of the pool. Then, create the pool using `zpool create ... rpool mirror /dev/disk/by-id/scsi-SATA_disk1-part1 /dev/disk/by-id/scsi-SATA_disk2-part1` (or replace `mirror` with `raidz`, `raidz2`, or `raidz3` and list the partitions from additional disks).
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* The pool name is arbitrary. On systems that can automatically install to ZFS, the root pool is named `rpool` by default. If you work with multiple systems, it might be wise to use `hostname`, `hostname0`, or `hostname-1` instead.
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## Step 3: System Installation
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@ -278,7 +278,7 @@ Install GRUB to the disk(s), not the partition(s).
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# mkdir /boot/efi
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# echo PARTUUID=$(blkid -s PARTUUID -o value \
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/dev/disk/by-id/scsi-SATA_disk1-part3) \
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/boot/efi vfat defaults 0 1 >> /etc/fstab
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/boot/efi vfat nofail,x-systemd.device-timeout=1 0 1 >> /etc/fstab
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# mount /boot/efi
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# apt install --yes grub-efi-amd64
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@ -406,6 +406,28 @@ The temporary name for the dataset is required to work-around [a bug in ecryptfs
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# usermod -a -G adm,cdrom,dip,lpadmin,plugdev,sambashare,sudo YOURUSERNAME
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6.8 Mirror GRUB
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If you installed to multiple disks, install GRUB on the additional disks:
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6.8a For legacy (MBR) booting:
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# dpkg-reconfigure grub-pc
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Hit enter until you get to the device selection screen.
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Select (using the space bar) all of the disks (not partitions) in your pool.
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6.8b UEFI
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# umount /boot/efi
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For the second and subsequent disks (increment ubuntu-2 to -3, etc.):
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# dd if=/dev/disk/by-id/scsi-SATA_disk1-part3 \
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of=/dev/disk/by-id/scsi-SATA_disk2-part3
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# efibootmgr -c -g -d /dev/disk/by-id/scsi-SATA_disk2 \
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-p 3 -L "ubuntu-2" -l '\EFI\Ubuntu\grubx64.efi'
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# mount /boot/efi
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## Step 7: Configure Swap
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7.1 Create a volume dataset (zvol) for use as a swap device:
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