Bug#613235: : Re: Bug#613235: release-notes: Watchdog during upgrade

[Duncan]

I posted the report referenced above at nas-central.org

This is a bad bug in the squeeze->wheezy upgrade procedure in that it 
will leave the Linkstation unbootable with no easy repair option if a 
pre-upgrade backup of the root file system is not available.



The simplest solution would be to update the squeeze version of 
micro-evtd so that it behaves the same way as the wheezy one when 
stopped, so upgrading to wheezy from a fully-updated squeeze would not  
kill the system!



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Bug#613235: release-notes: Watchdog during upgrade

[Julien Cristau]

On Sat, Mar 30, 2013 at 17:11:25 -0400, David Prévot wrote:

> Hi Ryan,
> 
> Le 30/03/2013 16:55, Ryan Tandy a écrit :
> 
> > In micro-evtd in wheezy, the init script's "stop" action disables the
> > watchdog, so the box won't be killed.
> 
> Thanks for your input. So nothing needs to be added in that regards for
> the Wheezy release notes, right?
> 
Wrong.  The squeeze package's init script will be called during the
upgrade to stop the daemon.

> > I had forgotten that the version
> > in squeeze doesn't have that behaviour.
> > 
> > I guess it's too late to make that change in squeeze.
> 
> It’s also too late to edit the Squeeze release notes, so I assume we
> should close this issue.
> 
Disagree.  We can still edit the squeeze release notes if necessary...

Cheers,
Julien


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Bug#613235: release-notes: Watchdog during upgrade

[Ryan Tandy]

On 13-03-30 02:11 PM, David Prévot wrote:

Le 30/03/2013 16:55, Ryan Tandy a écrit :


In micro-evtd in wheezy, the init script's "stop" action disables the
watchdog, so the box won't be killed.


Thanks for your input. So nothing needs to be added in that regards for
the Wheezy release notes, right?


This does concern the squeeze->wheezy upgrade. Before the daemon is 
upgraded, it is stopped using the init script from squeeze, which does 
not disable the watchdog. The change I added in wheezy only fixes the 
bug for future upgrades (wheezy->jessie and beyond).



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Bug#613235: release-notes: Watchdog during upgrade

[David Prévot]

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Hi Ryan,

Le 30/03/2013 16:55, Ryan Tandy a écrit :

> In micro-evtd in wheezy, the init script's "stop" action disables the
> watchdog, so the box won't be killed.

Thanks for your input. So nothing needs to be added in that regards for
the Wheezy release notes, right?

> I had forgotten that the version
> in squeeze doesn't have that behaviour.
> 
> I guess it's too late to make that change in squeeze.

It’s also too late to edit the Squeeze release notes, so I assume we
should close this issue.

Regards

David

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Bug#613235: release-notes: Watchdog during upgrade

[Ryan Tandy]

On 13-03-30 12:15 PM, Anders Montonen wrote:

Going by this  
there may still be some problems with the watchdog daemon, but I don't know if it is the 
same problem I had (ie. the new daemon not being started right away). I have not tried 
upgrading to Wheezy myself yet.


Thank you for bringing my attention to this bug.

In micro-evtd in wheezy, the init script's "stop" action disables the 
watchdog, so the box won't be killed. I had forgotten that the version 
in squeeze doesn't have that behaviour.


I guess it's too late to make that change in squeeze. I think adding a 
note in the release-notes would be useful, to the effect that users 
should run before upgrading:


# stop the daemon from resetting the watchdog timer
/etc/init.d/micro-evtd stop
# disable the watchdog timer
/usr/sbin/microapl -a system_set_watchdog off

I'm afraid my Linkstation is in storage right now, so I can't test the 
upgrade myself soon. Still, please let me know if there's anything else 
I can help with.


I'll post this in the thread you linked, as well.


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Bug#613235: release-notes: Watchdog during upgrade

[Anders Montonen]

On Mar 30, 2013, at 21:37, David Prévot wrote:

> Are you actually referring to avr-evtd, or another package (if so, witch
> one)?



Regards,
Anders Montonen

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Bug#613235: release-notes: Watchdog during upgrade

[David Prévot]

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Hi

Le 30/03/2013 15:15, Anders Montonen a écrit :
> On Mar 30, 2013, at 20:51, David Prévot wrote:
>> On Sun, Feb 13, 2011 at 06:51:58PM +0200, Anders Montonen wrote:
>>>
>>> The upgrade instructions should include a section on system watchdog daemons
>>> (eg. micro-evtd). Following the current instructions means the daemon will 
>>> be
>>> stopped in the middle of the upgrade when its replacement is unpacked, 
>>> meaning
>>> the watchdog will be tripped a short while after.
>>
>> Is this issue still relevant for Wheezy? I suspect it isn’t
> 
> there may still be some problems with the watchdog daemon,

$ apt-cache search micro evtd
avr-evtd - AVR watchdog daemon for Linkstation/Kuroboxes

Are you actually referring to avr-evtd, or another package (if so, witch
one)?

$ apt-cache policy avr-evtd
avr-evtd:
  Installed: (none)
  Candidate: 1.7.7-2
  Version table:
 1.7.7-2 0
500 http://ftp.us.debian.org/debian/ squeeze/main amd64 Packages
500 http://ftp.us.debian.org/debian/ wheezy/main amd64 Packages
500 http://ftp.us.debian.org/debian/ sid/main amd64 Packages

I hardly understand how an upgrade from Squeeze to Wheezy would affect a
non upgraded package (thus a priori a not restarded demon). If you are
referring to a third party package, the release note is not the place to
document its upgrade.

Regards

David

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Bug#613235: release-notes: Watchdog during upgrade

[Anders Montonen]

Hello,

On Mar 30, 2013, at 20:51, David Prévot wrote:

> Control: tags -1 moreinfo
> 
> Hi,
> 
> On Sun, Feb 13, 2011 at 06:51:58PM +0200, Anders Montonen wrote:
>> 
>> The upgrade instructions should include a section on system watchdog daemons
>> (eg. micro-evtd). Following the current instructions means the daemon will be
>> stopped in the middle of the upgrade when its replacement is unpacked, 
>> meaning
>> the watchdog will be tripped a short while after.
> 
> Is this issue still relevant for Wheezy? I suspect it isn’t and advise
> the RN wizard to close it (I may do so myself next time I come across
> this bug report unless more information is provided).

Going by this  
there may still be some problems with the watchdog daemon, but I don't know if 
it is the same problem I had (ie. the new daemon not being started right away). 
I have not tried upgrading to Wheezy myself yet.

Regards,
Anders Montonen

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Bug#613235: release-notes: Watchdog during upgrade

[David Prévot]

Control: tags -1 moreinfo

Hi,

On Sun, Feb 13, 2011 at 06:51:58PM +0200, Anders Montonen wrote:
> 
> The upgrade instructions should include a section on system watchdog daemons
> (eg. micro-evtd). Following the current instructions means the daemon will be
> stopped in the middle of the upgrade when its replacement is unpacked, meaning
> the watchdog will be tripped a short while after.

Is this issue still relevant for Wheezy? I suspect it isn’t and advise
the RN wizard to close it (I may do so myself next time I come across
this bug report unless more information is provided).

Regards

David



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Bug#613235: release-notes: Watchdog during upgrade

[Anders Montonen]

Package: release-notes
Severity: normal

The upgrade instructions should include a section on system watchdog daemons
(eg. micro-evtd). Following the current instructions means the daemon will be
stopped in the middle of the upgrade when its replacement is unpacked, meaning
the watchdog will be tripped a short while after.

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