[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[bugproxy]

** Tags removed: verification-needed
** Tags added: verification-done

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[bugproxy]

--- Comment From mauri...@br.ibm.com 2016-03-03 09:46 EDT---
Excellent, Manju. Thanks. Marking verification-done.

** Tags removed: verification-done
** Tags added: verification-needed

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mauricio Faria de Oliveira]

** Tags removed: verification-needed
** Tags added: verification-done

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Brian Murray]

Hello bugproxy, or anyone else affected,

Accepted multipath-tools into trusty-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/multipath-
tools/0.4.9-3ubuntu7.10 in a few hours, and then in the -proposed
repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: multipath-tools (Ubuntu Trusty)
   Status: Triaged => Fix Committed

** Tags added: verification-needed

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mathieu Trudel-Lapierre]

It's on my list, yes.

The idea however is that I haven't uploaded it because it is so annoying
to test these patches from a PPA, I uploaded the changes for xenial to
the archive for further testing since it looked like it worked
sufficiently to not break too many use cases.

** Also affects: multipath-tools (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Changed in: multipath-tools (Ubuntu Trusty)
   Status: New => Triaged

** Changed in: multipath-tools (Ubuntu Trusty)
   Importance: Undecided => Critical

** Changed in: multipath-tools (Ubuntu Trusty)
 Assignee: (unassigned) => Mathieu Trudel-Lapierre (mathieu-tl)

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Launchpad Bug Tracker]

This bug was fixed in the package multipath-tools - 0.5.0-7ubuntu15

---
multipath-tools (0.5.0-7ubuntu15) xenial; urgency=medium

  [ Mauricio Faria de Oliveira ]
  * Remove partition device nodes of individual paths (for LVM on multipath)
(LP: #1540401)
- debian/multipath-tools.dm-mpath-lvm.udev: udev rule for that.
- debian/initramfs/hooks: copy the udev rule and partx to the initramfs.
- debian/initramfs/init-top: load the dm-multipath module for 'multipath 
-c'.
- debian/rules: install the udev rule (priority 56: after 55-scsi-sg3_id)
  * debian/rules: don't ship 95-multipath.rules udev rules anymore; they are
not necessary with multipath-tools listening for udev events directly.

 -- Mathieu Trudel-Lapierre   Thu, 11 Feb 2016
19:08:14 -0500

** Changed in: multipath-tools (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mauricio Faria de Oliveira]

Hi @mathieu-tl,

Here is the patch for Xenial.

Differences from the patch for Trusty:
1) install udev rule with priority 56, so it's run after 55-scsi-sg3_id; this 
way the paths actually have scsi id udev attributes defined by the time 
'multipath -c' runs, and now it works fine (fixes the issue you mentioned on 
IRC).
2) remove the old multipath discovery udev rule (just like you applied for 
trusty, on multipath-tools 0.4.9-3ubuntu7.5)
3) debian/initramfs/init-top already exists, so just insert the snippet to load 
the module (rather than create the file).

Test-case:

1) Boot a qemu-kvm guest [1] w/ xenial (LVM on top of multipath) w/ the 
break=pre-multipath boot option 
2) exit all 3 initramfs prompts
3) this should make LVM scan run before multipath discovery; the latter fails 
to create the devmap, thus mpartX-part2 (for /boot) is not present, and the 
boot is interrupted.

...
(initramfs) exit
...
(initramfs) exit
...
(initramfs) exit
...
[   82.361944] device-mapper: table: 252:3: multipath: error getting 
device
[   82.362292] device-mapper: table: 252:2: multipath: error getting 
device
[   82.399493] device-mapper: table: 252:3: multipath: error getting 
device
[  OK  ] Found device /dev/mapper/mauricfo4--vg-swap_1.
 Activating swap /dev/mapper/mauricfo4--vg-swap_1...
[  OK  ] Activated swap /dev/mapper/mauricfo4--vg-swap_1.
[  OK  ] Reached target Swap.
[ TIME ] Timed out waiting for device dev-mapper-mpatha\x2dpart2.device.
[DEPEND] Dependency failed for /boot.
[DEPEND] Dependency failed for Local File Systems.
[DEPEND] Dependency failed for Clean up any mess left by 0dns-up.
[DEPEND] Dependency failed for File System Check on 
/dev/mapper/mpatha-part2.
...
Welcome to emergency mode! After logging in, type "journalctl -xb" to 
view
system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to
try again to boot into default mode.
Press Enter for maintenance
(or press Control-D to continue):

root@mauricfo4:~# lvm pvdisplay | grep Name
  Found duplicate PV hWoIFGkvc0iVrbZnzhhqxud6QTeotfmQ: using /dev/sda3 
not /dev/sdb3
  Using duplicate PV /dev/sda3 without holders, ignoring /dev/sdb3
  Found duplicate PV hWoIFGkvc0iVrbZnzhhqxud6QTeotfmQ: using /dev/sda3 
not /dev/sdb3
  Using duplicate PV /dev/sda3 without holders, ignoring /dev/sdb3
  PV Name   /dev/sda3
  VG Name   mauricfo4-vg

With the patch applied, the partition nodes are removed, LVM only scans
the multipath devices, and the boot finishes successfully:

...
(initramfs) exit
...
(initramfs) ls -l /dev/sd*
brw---18,  16 /dev/sdb
brw---18,   0 /dev/sda

initramfs) dmsetup table
No devices found

(initramfs) exit
...
(initramfs) dmsetup table | sort
mauricfo4--vg-root: 0 63750144 linear 252:3 2048
mauricfo4--vg-swap_1: 0 2834432 linear 252:3 63752192
mpatha-part1: 0 14336 linear 252:0 2048
mpatha-part2: 0 499712 linear 252:0 16384
mpatha-part3: 0 66590720 linear 252:0 516096
mpatha: 0 67108864 multipath 0 0 2 1 round-robin 0 1 1 8:0 1 
round-robin 0 1 1 8:16 1 

(initramfs) lvm pvdisplay | grep Name
  ...
  PV Name   /dev/mapper/mpatha-part3
  VG Name   mauricfo4-vg

(initramfs) exit
...

# lsb_release -c
Codename:   xenial

# mount | grep ' / '
/dev/mapper/mauricfo4--vg-root on / type ext4 
(rw,relatime,errors=remount-ro,data=ordered)

# lvm pvdisplay | grep Name
  PV Name   /dev/mapper/mpatha-part3
  VG Name   mauricfo4-vg

# dmsetup ls --tree -o blkdevname
mauricfo4--vg-swap_1  (252:5)
 └─mpatha-part3  (252:3)
└─mpatha  (252:0)
   ├─  (8:16)
   └─  (8:0)
mpatha-part2  (252:2)
 └─mpatha  (252:0)
├─  (8:16)
└─  (8:0)
mpatha-part1  (252:1)
 └─mpatha  (252:0)
├─  (8:16)
└─  (8:0)
mauricfo4--vg-root  (252:4)
 └─mpatha-part3  (252:3)
└─mpatha  (252:0)
   ├─  (8:16)
   └─  (8:0)

[1] qemu command line: commandline: qemu-system-ppc64 -enable-kvm
-nographic -nodefaults -monitor stdio -serial pty -M pseries -smp
1,cores=1,threads=1 -m 8G -drive file=disk.qcow2,serial=xenialroot
-drive file=disk.qcow2,serial=xenialroot -S

** Patch added: "Patch for Xenial"
   
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1540401/+attachment/4569667/+files/multipath-tools_dm-mpath-lvm_xenial.debdiff

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mathew Hodson]

** Package changed: ubuntu => multipath-tools (Ubuntu)

** Changed in: multipath-tools (Ubuntu)
   Importance: Undecided => Critical

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mathieu Trudel-Lapierre]

** Changed in: multipath-tools (Ubuntu)
   Status: Confirmed => In Progress

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mauricio Faria de Oliveira]

Hi @mathew-hodson,

In case it helps,
I believe this bug is likely to be assigned to @mathieu-tl.

We've been working on these sort of problems, and talked about a tentative 
14.04.4 milestone.
Thanks!

PS. Deleted previous attachment/patch version.


** Patch removed: "Patch for booting with LVM on multipath devices"
   
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1540401/+attachment/4563337/+files/multipath-tools_dm-mpath-lvm.debdiff

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Steve Langasek]

** Changed in: multipath-tools (Ubuntu)
 Assignee: Taco Screen team (taco-screen-team) => Mathieu Trudel-Lapierre 
(mathieu-tl)

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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[Bug 1540401] Re: ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The disk drive for /boot is not ready yet or not present"

[Mathieu Trudel-Lapierre]

This isn't obvious to reproduce. So far, I haven't had the system fail
to boot or fail to mount all partitions. I have been testing *without*
multipath-tools 0.4.9-3ubuntu7.8; so not using multipathd in the
initramfs.

I suppose it may be that I'm using a partitioning that happens to work?

Could you please add the output of: sudo dmsetup ls --tree -o blkdevname

No failure after 20 reboots:

mpath0-part1  (252:2)
 └─mpath0  (252:0)
├─  (8:16)
└─  (8:0)
mpath1  (252:1)
 ├─  (8:48)
 └─  (8:32)
trusty-boot  (252:6)
 └─mpath0-part2  (252:3)
└─mpath0  (252:0)
   ├─  (8:16)
   └─  (8:0)
trusty-swap  (252:5)
 └─mpath0-part2  (252:3)
└─mpath0  (252:0)
   ├─  (8:16)
   └─  (8:0)
trusty-root  (252:4)
 └─mpath0-part2  (252:3)
└─mpath0  (252:0)
   ├─  (8:16)
   └─  (8:0)

My test system is indeed a ppc64el qemu VM using spapr-vscsi.

Will setup a new system using snapshot to test with multipath-tools
0.4.9-3ubuntu7.8.

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Title:
  ISST-LTE: Ubuntu14.04.4 lpar fails to boot after installation: "The
  disk drive for /boot is not ready yet or not present"

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