** Description changed:
Sysadmin reported in #ubuntu (later #ubuntu-kernel) the 16.04 ubuntu-
- server failed due to being unable to configure linux-
+ server ISO installer failed due to being unable to configure linux-
image-4.4.0-21-generic.
Lots of diagnostics and one SSH remote session later we seem to have
narrowed it down to the installer.
At the installer's boot menu the F6 option "Expert mode" is chosen.
During initial ram file-system creation (after the kernel image is installed)
the /dev/ file-system is not mounted in /target/ and therefore
the initramfs-tools/hook-functions::dep_add_modules_mount() cannot match
the mount device of "/" (in this case /dev/sda3) with any node under /dev/
which only contains static entries.
Cause appears to be that live-installer.postinst has the crucial step
calling library.sh:setup_dev() commented out:
#waypoint 1 setup_dev
OS=linux
setup_dev() calls setup_dev_${OS}
setup_dev_linux() mounts procfs and devtmpfs into /target/
-
----
Originally the cause of the error message appeared to be that the
symlink names in /dev/disk/by-uuid/ haven't been updated after the
partitioning stage if there were pre-existing partitions and file-
systems on the install device, *and* the sysadmin chose to format the
existing partitions when selecting mountpoints.
In this case a hardware RAID device presents:
/dev/sda1 (/boot/)
/dev/sda2 (swap)
/dev/sda3 (/)
From the shell I noticed:
root@tmpstorage:/# ll /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 May 17 19:39 130e4419-4bfd-46d2-87f9-62e5379bf591
-> ../../sda1
lrwxrwxrwx 1 root root 10 May 17 19:39 127d3fa1-c07c-48e4-9e26-1b926d37625c
-> ../../sda3
lrwxrwxrwx 1 root root 10 May 17 19:39 78b88456-2b0b-4265-9ed2-5db61522d887
-> ../../sda2
lrwxrwxrwx 1 root root 9 May 17 19:39 2016-04-20-22-45-29-00 -> ../../sr1
drwxr-xr-x 6 root root 120 May 17 19:39 ..
drwxr-xr-x 2 root root 120 May 17 19:39 .
root@tmpstorage:/# blkid /dev/sda*
/dev/sda: PTUUID="a84e60fd" PTTYPE="dos"
/dev/sda1: UUID="61365714-8ff7-47a2-8035-8aed9e3191a6" TYPE="ext4"
PARTUUID="a84e60fd-01"
/dev/sda2: UUID="78b88456-2b0b-4265-9ed2-5db61522d887" TYPE="swap"
PARTUUID="a84e60fd-02"
/dev/sda3: UUID="75f68451-9472-47c7-9efc-ed032bfa9987" TYPE="ext4"
PARTUUID="a84e60fd-03"
More details to follow.
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https://bugs.launchpad.net/bugs/1582899
Title:
in-target: mkinitramfs: failed to determine device for /
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