out of the box install crashes. works fine on developer's machine. nice QA as usual.

[Andrey Lelikov]

hello,world

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.3
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CasperVersion: 1.376.2
Date: Tue Jun 6 10:15:26 2017
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu-gnome.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu-GNOME 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Phillip Susi (psusi)]

Please run the following commands and post the output:

sudo mdadm -D /dev/md0
sudo grub-probe -vvv -d /dev/md0

[Andrey Lelikov (lagnchpad)]

this is likely not your bug. apparently ubiquity does not install mdadm into target install dir at all.

[Andrey Lelikov (lagnchpad)]

this is ubiquity not installing mdadm onto target

[Andrey Lelikov (lagnchpad)]

confirmed. a true dup of #880766 from 2011. Today is 2017 and installing ubuntu on software raid is still unsupported scenario. this is ubuntu...

workaround:

1. install w/o the bootloader (undocumented switch!)
sudo ubiquity -b

2. chroot into target system, install mdadm, switch grub-pc to grub-efi, profit.

root@ubuntu-gnome:/root/tsta# mount /dev/mapper/root_crypt /tgt
root@ubuntu-gnome:/root/tsta# mount -o bind /dev /tgt/dev
root@ubuntu-gnome:/root/tsta# mount -o bind /dev/pts /tgt/dev/pts
root@ubuntu-gnome:/root/tsta# mount -o bind /sys /tgt/sys
root@ubuntu-gnome:/root/tsta# mount -o bind /proc /tgt/proc
root@ubuntu-gnome:/root/tsta# cat /etc/resolv.conf > /tgt/etc/resolv.conf
root@ubuntu-gnome:/root/tsta# mount /dev/md0 /tgt/boot
root@ubuntu-gnome:/root/tsta# chroot /tgt
root@ubuntu-gnome:/# mount /dev/sda1 /boot/efi

root@ubuntu-gnome:/# apt-get install mdadm
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  default-mta | mail-transport-agent
The following NEW packages will be installed:
  mdadm
0 upgraded, 1 newly installed, 0 to remove and 194 not upgraded.
Need to get 393 kB of archives.
After this operation, 1,203 kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 mdadm amd64 3.3-2ubuntu7.2 [393 kB]
Fetched 393 kB in 0s (778 kB/s)
Preconfiguring packages ...
Selecting previously unselected package mdadm.
(Reading database ... 188668 files and directories currently installed.)
Preparing to unpack .../mdadm_3.3-2ubuntu7.2_amd64.deb ...
Unpacking mdadm (3.3-2ubuntu7.2) ...
Processing triggers for systemd (229-4ubuntu16) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up mdadm (3.3-2ubuntu7.2) ...
Generating mdadm.conf... done.
update-initramfs: deferring update (trigger activated)
/usr/sbin/grub-mkconfig: 250: /usr/sbin/grub-mkconfig: cannot create /boot/grub/grub.cfg.new: Directory nonexistent
Running in chroot, ignoring request.
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
Processing triggers for systemd (229-4ubuntu16) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for initramfs-tools (0.122ubuntu8.8) ...
update-initramfs: Generating /boot/initrd.img-4.8.0-54-generic

root@ubuntu-gnome:/# grub-install /dev/sda
Installing for i386-pc platform.
grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
grub-install: error: embedding is not possible, but this is required for RAID and LVM install.

root@ubuntu-gnome:/# apt-get install grub-efi
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  grub-common grub-efi-amd64 grub-efi-amd64-bin grub-pc-bin grub2-common
Suggested packages:
  multiboot-doc grub-emu xorriso desktop-base
The following packages will be REMOVED:
  grub-gfxpayload-lists grub-pc
The following NEW packages will be installed:
  grub-efi grub-efi-amd64 grub-efi-amd64-bin
The following packages will be upgr...

[Phillip Susi (psusi)]

Grub should not need mdadm for grub-probe to work. Whenever I install on raid, I never have the boot loader fail to install; just have to remember to chroot in after and install mdadm before rebooting or the installed system won't boot past the initramfs.

[Phillip Susi (psusi)]

It looks like it is finding the array, but doesn't find anything inside it. What does blkid say is in /dev/md0?

[Andrey Lelikov (lagnchpad)]

root@lelikusa:~# blkid /dev/md0
/dev/md0: UUID="35233d76-cfd5-4608-a347-adc92b104f78" TYPE="ext2"
root@lelikusa:~# cat /proc/mounts | grep md0
/dev/md0 /boot ext2 rw,relatime,block_validity,barrier,user_xattr,acl 0 0

I'm pretty sure blkid was working on md0 from rescue disc.

[Phillip Susi (psusi)]

Oh, I missed it in the log the first time; grub-probe did detect ext2 on /dev/md0. But that was on the installed system right? Can you run it from the livecd?