Ubuntu On a ZFS Root File System for Ubuntu 14.04
This is an update post to making an Ubuntu 14.04 (Trusty Tahr) OS work with ZFS root volume. Mostly the instructions remains the same as a previous post so this is a shortened version:
http://blog.ls-al.com/booting-ubuntu-on-a-zfs-root-file-system/
Small warning I did this 4 times. It worked the first time but of course I did not document it well the first time and when I tried again I had grub issues.
Step 1:
$ sudo -i # apt-add-repository --yes ppa:zfs-native/stable
** Don't need grub ppa as per github instructions???
# apt-get update # apt-get install debootstrap ubuntu-zfs
** Will take quite a while kernel modules compiles!!
# modprobe zfs # dmesg | grep ZFS: [ 1327.346821] ZFS: Loaded module v0.6.2-2~trusty, ZFS pool version 5000, ZFS filesystem version 5
Step 2:
# ls /dev/disk/by-id ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419 ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part2 # fdisk /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419
** Make partitions as follow
# fdisk -l /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419
Device Boot Start End Blocks Id System
/dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 * 2048 206847 102400 be Solaris boot
/dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part2 206848 16777215 8285184 bf Solaris
Step 3:
# mke2fs -m 0 -L /boot/grub -j /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 # zpool create -o ashift=9 rpool /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part2 # zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT rpool 7.88G 117K 7.87G 0% 1.00x ONLINE - # zfs create rpool/ROOT # zfs create rpool/ROOT/ubuntu-1 # zfs umount -a # zfs set mountpoint=/ rpool/ROOT/ubuntu-1 # zpool export rpool
Step 4:
# zpool import -d /dev/disk/by-id -R /mnt rpool # mkdir -p /mnt/boot/grub # mount /dev/disk/by-id/scsi-SATA_disk1-part1 /mnt/boot/grub # debootstrap trusty /mnt
WTF: ** System seems hung. I see on a different terminal there was a messages system restart required. Weird. If you get this after debootstrap you have to redo Step 1 and Step 4.1 then...Is this because of only 2G RAM?
Step 5:
# cp /etc/hostname /mnt/etc/ # cp /etc/hosts /mnt/etc/ # tail -1 /mnt/etc/fstab /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 /boot/grub auto defaults 0 1 # mount --bind /dev /mnt/dev # mount --bind /proc /mnt/proc # mount --bind /sys /mnt/sys # chroot /mnt /bin/bash --login # locale-gen en_US.UTF-8 # apt-get update # apt-get install ubuntu-minimal software-properties-common # apt-add-repository --yes ppa:zfs-native/stable # apt-add-repository --yes ppa:zfs-native/grub < - See below note on this command # apt-get update # apt-get install --no-install-recommends linux-image-generic linux-headers-generic # apt-get install ubuntu-zfs # apt-get install grub2-common grub-pc
Quick note on grub issues. During the install I had to create soft links since I could not figure out the grub-probe failures. From memory I think I created soft links as follow and purged grub2-common grub-pc and re-installed:
/dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419 >>>> /dev/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419 /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 >>>> /dev/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part1 /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part2 >>>> /dev/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419-part2
Update 5.6.14: After I had time to look at it closer I see my grub issues all came from the fact that there is no trusty grub ppa and the apt-add-repository command above is setting up a trusty repo. Quickest way to fix this is after the apt-add-repository --yes ppa:zfs-native/grub command fix the file manually to use raring. As follow:
# more /etc/apt/sources.list.d/zfs-native-grub-trusty.list deb http://ppa.launchpad.net/zfs-native/grub/ubuntu raring main
Now ready to continue on.
# apt-get install zfs-initramfs # apt-get dist-upgrade # passwd root
Step 6:
# grub-probe / zfs # ls /boot/grub/i386-pc/zfs* /boot/grub/i386-pc/zfs.mod /boot/grub/i386-pc/zfsinfo.mod # update-initramfs -c -k all update-initramfs: Generating /boot/initrd.img-3.13.0-24-generic # grep "boot=zfs" /boot/grub/grub.cfg linux /ROOT/ubuntu-1@/boot/vmlinuz-3.13.0-24-generic root=ZFS=rpool/ROOT/ubuntu-1 ro boot=zfs linux /ROOT/ubuntu-1@/boot/vmlinuz-3.13.0-24-generic root=ZFS=rpool/ROOT/ubuntu-1 ro boot=zfs # grep zfs /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="boot=zfs" # update-grub # grub-install $(readlink -f /dev/disk/by-id/ata-VBOX_HARDDISK_VBb4fe25f7-8f14d419) Installation finished. No error reported. # exit
Step 7:
# umount /mnt/boot/grub # umount /mnt/dev # umount /mnt/proc # umount /mnt/sys # zfs umount -a # zpool export rpool # reboot
Post First Reboot:
- Made a VB snapshot of course
- apt-get install ubuntu-desktop
** grub issues again so I remade the link again. Later fixed with the grub ppa repo pointing to raring instead.
- create a user
- install VB Guest Additions
TODO:
- Check into grub issue and having to create soft links. Something to do with grub not following soft links.
