Pkg xen devel - Aug 2015 - Bug#500047: xen-utils-3.0.3-1: domU reboot fails when using DRBD as vbd

Package: xen-utils-3.0.3-1
Version: 3.0.3-0-4
Severity: normal


Rebooting from inside domU hangs in initrd:

  Begin: Waiting for root file system... ...

Root file system is not available because underlying DRBD device
got deactivated during reboot:

  $ cat /proc/drbd 
  version: 8.0.13 (api:86/proto:86)
  GIT-hash: ee3ad77563d2e87171a3da17cc002ddfd1677dbe build by phil at fat-tyre,
2008-08-04 15:28:07
   1: cs:Connected st:Secondary/Secondary ds:UpToDate/UpToDate C r---
      ns:46440 nr:0 dw:46440 dr:427691 al:25 bm:717 lo:0 pe:0 ua:0 ap:0
          resync: used:0/61 hits:0 misses:0 starving:0 dirty:0 changed:0
          act_log: used:0/127 hits:6821 misses:25 starving:0 dirty:0 changed:25

Destroying/creating the old/new domain generates the udev remove/add 
events in correct order and cause a parallel execution of xen block scripts:

  Sep 24 16:59:32 srv logger: /etc/xen/scripts/block: remove
XENBUS_PATH=backend/vbd/39/2049
  Sep 24 16:59:32 srv logger: /etc/xen/scripts/block: add
XENBUS_PATH=backend/vbd/40/2049
  Sep 24 16:59:32 srv logger: /etc/xen/scripts/block-drbd: add
XENBUS_PATH=backend/vbd/40/2049
  Sep 24 16:59:33 srv logger: /etc/xen/scripts/block-drbd: remove
XENBUS_PATH=backend/vbd/39/2049
  Sep 24 16:59:33 srv logger: /etc/xen/scripts/block-drbd: Writing
backend/vbd/40/2049/physical-device 93:1 to xenstore.
  Sep 24 16:59:33 srv logger: /etc/xen/scripts/block-drbd: Writing
backend/vbd/40/2049/hotplug-status connected to xenstore.

Quite often the block(add) script runs first leaving the device in Primary
state,
but then the block(remove) script causes it to go from Primary to Secondary.

Attached patch causes xend to wait for devices to get removed before creating
the new domain.

-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-6-xen-amd64
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages xen-utils-3.0.3-1 depends on:
ii  iproute                20061002-3        Professional tools to control the 
ii  libc6                  2.3.6.ds1-13etch7 GNU C Library: Shared libraries
ii  libncurses5            5.5-5             Shared libraries for terminal hand
ii  python                 2.4.4-2           An interactive high-level object-o
ii  python-central         0.5.12            register and build utility for Pyt
ii  udev                   0.105-4           /dev/ and hotplug management daemo
ii  xen-utils-common       3.0.3-0-2         XEN administrative tools - common 
ii  zlib1g                 1:1.2.3-13        compression library - runtime

Versions of packages xen-utils-3.0.3-1 recommends:
ii  bridge-utils                  1.2-1      Utilities for configuring the Linu
ii  xen-hypervisor-3.0.3-1-amd64  3.0.3-0-4  The Xen Hypervisor on AMD64

-- no debconf information
-------------- next part --------------
--- /usr/lib/xen-3.0.3-1/lib/python/xen/xend/XendDomainInfo.py.dist    
2008-09-24 16:37:28.000000000 +0200
+++ /usr/lib/xen-3.0.3-1/lib/python/xen/xend/XendDomainInfo.py  2008-09-24
16:38:16.000000000 +0200
@@ -1670,6 +1670,7 @@
             else:
                 self.unwatchVm()
                 self.destroyDomain()
+                self.testDeviceComplete()
 
             # new_dom's VM will be the same as this domain's VM, except
where
             # the rename flag has instructed us to call preserveForRestart.

Control: tags -1 +moreinfo
On Wed, 24 Sep 2008 17:19:08 +0200 Valentin Vidic <vvidic at carnet.hr>
wrote:
> Package: xen-utils-3.0.3-1
> Version: 3.0.3-0-4
> Severity: normal
> 
> 
> Rebooting from inside domU hangs in initrd:
> 
>   Begin: Waiting for root file system... ...
> 
> Root file system is not available because underlying DRBD device
> got deactivated during reboot:
Sorry this bug seems to have fallen through the cracks.

I've heard of people using drdb fairly recently so I think there is a g
ood chance that this issue has been fixed in either recent Xen or DRDB
packages (I'm not sure where block-drdb comes from these days).

Please can you confirm whether or not you are still seeing this issue,
thanks.

Ian.

Processing control commands:
> tags -1 +moreinfo
Bug #500047 [src:xen] xen-utils-3.0.3-1: domU reboot fails when using DRBD as
vbd
Added tag(s) moreinfo.

-- 
500047: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=500047
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems

Processing control commands:
> tags -1 +moreinfo
Bug #500047 [src:xen] xen-utils-3.0.3-1: domU reboot fails when using DRBD as
vbd
Ignoring request to alter tags of bug #500047 to the same tags previously set

-- 
500047: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=500047
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems

On Fri, Aug 21, 2015 at 04:19:05PM +0100, Ian Campbell
wrote:
> Sorry this bug seems to have fallen through the cracks.
> 
> I've heard of people using drdb fairly recently so I think there is a g
> ood chance that this issue has been fixed in either recent Xen or DRDB
> packages (I'm not sure where block-drdb comes from these days).
> 
> Please can you confirm whether or not you are still seeing this issue,
> thanks.
We are still using Xen on DRBD and reboot works fine so you can
definitely close this one too.

-- 
Valentin

Your message dated Fri, 04 Sep 2015 14:08:35 +0100
with message-id <1441372115.26292.493.camel at debian.org>
and subject line Re: [Pkg-xen-devel] Bug#500047: xen-utils-3.0.3-1: domU reboot
fails when using DRBD as vbd
has caused the Debian Bug report #500047,
regarding xen-utils-3.0.3-1: domU reboot fails when using DRBD as vbd
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner at bugs.debian.org
immediately.)


-- 
500047: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=500047
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems
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