Devuan bug report logs - #633
qemu-guest-agent: Guest agent does not shut down the guest when requested to

Package: sysvinit; Severity: grave; Reported by: Fabio Muzzi <debianbugs@kurgan.org>; Keywords: chimaera; Done: dak@devuan.org; Maintainer for sysvinit is Devuan Developers <devuan-dev@lists.dyne.org>.

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Subject: #633: fixed in src:sysvinit version 2.96-7+devuan2
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Version: 2.96-7+devuan2

Source package sysvinit (2.96-7+devuan2) added to Devuan suite chimaera.

This closes bug report 633.

Thanks

DAK managing the Devuan archive

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Format: 1.8
Date: Fri, 26 Nov 2021 16:21:12 +0000
Source: sysvinit
Architecture: source
Version: 2.96-7+devuan2
Distribution: chimaera
Urgency: medium
Maintainer: Devuan Developers <devuan-dev@lists.dyne.org>
Changed-By: Mark Hindley <mark@hindley.org.uk>
Closes: 633
Changes:
 sysvinit (2.96-7+devuan2) chimaera; urgency=medium
 .
   * Backport upstream patch to fix parsing of shutdown +0 (Closes: #633).
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Notification sent to Fabio Muzzi <debianbugs@kurgan.org>:
bug acknowledged by developer. Full text available.
Reply sent to dak@devuan.org:
You have taken responsibility. Full text available.
Marked as fixed in versions 3.00-1+devuan1. Request was from Mark Hindley <mark@hindley.org.uk> to control@bugs.devuan.org. Full text available.
Marked as found in versions 2.96-7+devuan1. Request was from Mark Hindley <mark@hindley.org.uk> to control@bugs.devuan.org. Full text available.
bug reassigned from package 'src:sysvinit' to 'sysvinit'. Request was from Mark Hindley <mark@hindley.org.uk> to control@bugs.devuan.org. Full text available.

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To: 633@bugs.devuan.org
From: Fabio Muzzi <debianbugs@kurgan.org>
Subject: sysvinit-core from backports works - FIXED
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Thank you very much.

I have enabled backports and installed sysvinit AND SYSVINIT-CORE TOO (otherwise it does not install the actual shutdown binary) from backports, like this:


apt -t chimaera-backports install sysvinit-core sysvinit


And now it works as it should.

Answering to another comment from you, there is no way to fix the agent by configuring it, its shutdown commands are hardcoded.

-- 
Fabio "Kurgan" Muzzi

- IZ4UFQ -

"Il massimo danno con il minimo sforzo"


Acknowledgement sent to Fabio Muzzi <debianbugs@kurgan.org>:
Extra info received and forwarded to list. Copy sent to Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>. Full text available.
Information forwarded to devuan-bugs@lists.dyne.org, Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>:
bug#633; Package src:sysvinit. Full text available.

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To: 633@bugs.devuan.org, Fabio Muzzi <debianbugs@kurgan.org>
Subject: Re: bug#633: Actually sysvinit /sbin/shutdown's fault
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Fabio,

On Sun, Nov 21, 2021 at 12:32:51PM +0000, Mark Hindley wrote:
> I will investigate backporting to chimaera.

I have just added src:sysvinit 3.00-1+devuan1 to chimaera-backports.

Can you try that version, please?

Thanks.

Mark

Information forwarded to devuan-bugs@lists.dyne.org, Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>:
bug#633; Package src:sysvinit. Full text available.

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From: Mark Hindley <mark@hindley.org.uk>
To: Fabio Muzzi <debianbugs@kurgan.org>, 633@bugs.devuan.org
Subject: Re: bug#633: Actually sysvinit /sbin/shutdown's fault
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Control: reassign -1 src:sysvinit
Control: found -1 2.96-7+devuan1
Control: notfount -1 3.00-1+devuan1
Control: tags -1 =chimaera

Fabio,

On Sun, Nov 21, 2021 at 09:27:58AM +0000, Mark Hindley wrote:
> > "-h -P +0 hypervisor initiated shutdown"

As rrq just pointed out on #devuan-infra, this is actually a bug in sysvinit
/sbin/shutdown not parsing the +0 argument.

This was fixed upstream in version 2.98:

sysvinit (2.98) released; urgency=low

    * Fixed time parsing in shutdown when there is a + in front of a 0 time offset.
      Commands with a positive time offset (+1) would work but +0 fails.
      This has been corrected by Arkadiusz Miskiewicz.

Reassigning and setting versions.

I will investigate backporting to chimaera.

Thanks.

Mark

Information forwarded to devuan-bugs@lists.dyne.org, Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>:
bug#633; Package src:sysvinit. Full text available.
Added tag(s) chimaera; removed tag(s) debian. Request was from Mark Hindley <mark@hindley.org.uk> to 633-submit@bugs.devuan.org. Full text available.
No longer marked as found in versions 1:5.2+dfsg-11+deb11u1. Request was from Mark Hindley <mark@hindley.org.uk> to 633-submit@bugs.devuan.org. Full text available.
bug reassigned from package 'qemu-guest-agent' to 'src:sysvinit'. Request was from Mark Hindley <mark@hindley.org.uk> to 633-submit@bugs.devuan.org. Full text available.

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Subject: Re: bug#633: Actually sysvinit /sbin/shutdown's fault
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Fabio,

On Sun, Nov 21, 2021 at 09:27:58AM +0000, Mark Hindley wrote:
> > "-h -P +0 hypervisor initiated shutdown"

As rrq just pointed out on #devuan-infra, this is actually a bug in sysvinit
/sbin/shutdown not parsing the +0 argument.

This was fixed upstream in version 2.98:

sysvinit (2.98) released; urgency=low

    * Fixed time parsing in shutdown when there is a + in front of a 0 time offset.
      Commands with a positive time offset (+1) would work but +0 fails.
      This has been corrected by Arkadiusz Miskiewicz.

Reassigning and setting versions.

I will investigate backporting to chimaera.

Thanks.

Mark

Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#633; Package qemu-guest-agent. Full text available.
Added tag(s) debian. Request was from Mark Hindley <mark@hindley.org.uk> to 633-submit@bugs.devuan.org. Full text available.

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Control: tags -1 debian

Fabio,

Thanks for this and debugging what is going on.

On Sat, Nov 20, 2021 at 11:54:29PM +0100, Fabio Muzzi wrote:
> 
> I have gone further and run gdb.
> 
> It seems that the agent actually tries to call /sbin/shutdown with the following parameters:
> 
> "-h -P +0 hypervisor initiated shutdown"

To me, this is a bug in qemu-agent which is assuming the guest is running
systemd.

qemu-agent is not a forked package and Devuan uses Debian's packages directly
without recompilation. So, in principle, this is an issue that needs reporting
to Debian's BTS to be fixed there. However, if there is a configuration option
to change the shutdown command sent, we might be able to override that in
Devuan.  I don't use the package myself, so it would be helpful if you could
investigate that?

Thanks

Mark

Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#633; Package qemu-guest-agent. Full text available.

Message received at 633@bugs.devuan.org:


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To: 633@bugs.devuan.org
From: Fabio Muzzi <debianbugs@kurgan.org>
Subject: gdb trace - and a workaround
Message-ID: <2089ef48-eb48-7c39-d4d1-2c400d502fbc@kurgan.org>
Date: Sat, 20 Nov 2021 23:54:29 +0100
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I have gone further and run gdb.

It seems that the agent actually tries to call /sbin/shutdown with the following parameters:

"-h -P +0 hypervisor initiated shutdown"


But if I run shutdown manually with  these parameters, I get an error and the help message shows up:



root@fileserver:/sbin# /sbin/shutdown -h -P +0 hypervisor initiated shutdown
Usage:    shutdown [-akrhPHfFnc] [-t sec] time [warning message]
                   -a:      use /etc/shutdown.allow
                   -k:      don't really shutdown, only warn.
                   -r:      reboot after shutdown.
                   -h:      halt after shutdown.
                   -P:      halt action is to turn off power.
                            can only be used along with -h flag.
                   -H:      halt action is to just halt.
                            can only be used along with -h flag.
                   -f:      do a 'fast' reboot (skip fsck).
                   -F:      Force fsck on reboot.
                   -n:      do not go through "init" but go down real fast.
                   -c:      cancel a running shutdown.
                   -q:      quiet mode - display fewer shutdown warnings.
                   -Q:      full quiet mode - display only final shutdown warning.
                   -t secs: delay between warning and kill signal.
                   ** the "time" argument is mandatory! (try "now") **



So it seems that /sbin/shutdown does not like the command line that qemu-agent uses.

It seems that the Devuan shutdown command wants a mandatory "time", so for example

shutdown -h -P now

works.

But the qemu agent uses a syntax that is wrong for the Devuan shutdown binary, while it works fine for the systemd-infested shutdown that is just a link to systemcl (in Debian 11).


A workaroung is to rename /sbin/shutdown and create a script that calls shutdown with a command line that it accepts, like:


/sbin/shutdown -h -P now hypervisor initiated shutdown

Notice the "now" instead of the "+0" in the arguments.


-- 
Fabio "Kurgan" Muzzi

- IZ4UFQ -

"Il massimo danno con il minimo sforzo"


Acknowledgement sent to Fabio Muzzi <debianbugs@kurgan.org>:
Extra info received and forwarded to list. Copy sent to devuan-dev@lists.dyne.org. Full text available.
Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#633; Package qemu-guest-agent. Full text available.

Message received at 633@bugs.devuan.org:


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	for 633@bugs.devuan.org; Sat, 20 Nov 2021 22:30:21 +0100
To: 633@bugs.devuan.org
From: Fabio Muzzi <debianbugs@kurgan.org>
Subject: Adding a debug session...
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Date: Sat, 20 Nov 2021 22:30:21 +0100
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I have tried adding debug to qemu-ga by running it with "-v"


This is the output (quite useless):

....

1637443549.171361: debug: received EOF
1637443549.271676: debug: received EOF
1637443549.371984: debug: received EOF
1637443549.472366: debug: received EOF
1637443549.572709: debug: received EOF
1637443549.672992: debug: received EOF
1637443549.773299: debug: received EOF
1637443549.873531: debug: received EOF
1637443549.973770: debug: received EOF
1637443550.74010: debug: received EOF
1637443550.174254: debug: received EOF
1637443550.274485: debug: received EOF
1637443550.374718: debug: received EOF
1637443550.474979: debug: read data, count: 107, data: {"execute":"guest-sync-delimited","arguments":{"id":14277701}}
{"execute":"guest-shutdown","arguments":{}}

1637443550.475015: debug: process_event: called
1637443550.475017: debug: processing command
1637443550.475033: debug: sending data, count: 22
1637443550.475064: debug: process_event: called
1637443550.475065: debug: processing command
1637443550.475949: debug: sending data, count: 85
1637443550.476270: debug: received EOF
1637443550.576487: debug: received EOF
1637443550.676752: debug: received EOF
1637443550.776995: debug: received EOF
1637443550.877230: debug: received EOF
1637443550.977466: debug: received EOF
1637443551.77712: debug: received EOF
1637443551.177949: debug: received EOF
1637443551.278182: debug: received EOF
1637443551.378414: debug: received EOF
1637443551.478652: debug: received EOF
1637443551.578900: debug: received EOF
1637443551.679143: debug: received EOF
1637443551.779237: debug: received EOF

....


-- 
Fabio "Kurgan" Muzzi

- IZ4UFQ -

"Il massimo danno con il minimo sforzo"


Acknowledgement sent to Fabio Muzzi <debianbugs@kurgan.org>:
Extra info received and forwarded to list. Copy sent to devuan-dev@lists.dyne.org. Full text available.
Information forwarded to devuan-bugs@lists.dyne.org, devuan-dev@lists.dyne.org:
bug#633; Package qemu-guest-agent. Full text available.

Message received at submit@bugs.devuan.org:


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From: Fabio Muzzi <debianbugs@kurgan.org>
To: Devuan Bug Tracking System <submit@bugs.devuan.org>
Subject: qemu-guest-agent: Guest agent does not shut down the guest when requested to
Message-ID: <163743517558.1458.16031504645366650167.reportbug@fileserver.geldue.locale>
Date: Sat, 20 Nov 2021 20:06:15 +0100
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Package: qemu-guest-agent
Version: 1:5.2+dfsg-11+deb11u1
Severity: grave
Justification: renders package unusable
X-Debbugs-Cc: debianbugs@kurgan.org

Dear Maintainer,

I have installed a Devuan 4 guest in a PVE 7.1 host, with Quemu guest
enabled in PVE and the guest agent package installed in the guest.

When commanding a guest shutdown from the host, a shutdown command is
sent to the guest agent (because the host knows the guest has the agent
installed, otherwise it would use an ACPI command to "press the power
button").

The guest gets the command, and writes in the syslog the following line:

Nov 20 18:50:09 fileserver qemu-ga: info: guest-shutdown called, mode:
(null)

Then a shutdown should be initiated, but nothing happens. The guest
keeps running.

I can send multiple shutdown commands from the host, they are all
received by the guest, but nothing happens, they just get logged in the
syslog.

I would expect the guest agent to start a shutdown.


Tried installing a Debian 11 virtual on the same PVE host, and the
shutdown command works as expected, logging the same line and then
immediately commanding a shutdown.


I suppose that this version of qemu-ga requires systemd to actually command a shutdown? 

Qemu-ga is version 5.2.0

It worked in Devuan 3.


Kind regards


-- System Information:
Distributor ID:	Devuan
Description:	Devuan GNU/Linux 4 (chimaera)
Release:	4
Codename:	chimaera
Architecture: x86_64

Kernel: Linux 5.10.0-9-amd64 (SMP w/2 CPU threads)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled

Versions of packages qemu-guest-agent depends on:
ii  init-system-helpers   1.60+devuan1
ii  libc6                 2.31-13+deb11u2
ii  libeudev1 [libudev1]  3.2.9-10~chimaera1
ii  libglib2.0-0          2.66.8-1
ii  liburing1             0.7-3
ii  lsb-base              11.1.0

qemu-guest-agent recommends no packages.

qemu-guest-agent suggests no packages.

-- no debconf information

Acknowledgement sent to Fabio Muzzi <debianbugs@kurgan.org>:
New bug report received and forwarded. Copy sent to debianbugs@kurgan.org, devuan-dev@lists.dyne.org. Full text available.
Report forwarded to devuan-bugs@lists.dyne.org, debianbugs@kurgan.org, devuan-dev@lists.dyne.org:
bug#633; Package qemu-guest-agent. Full text available.

Devuan BTS -- Powered by Debian bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.

Devuan Bugs Owner <owner@bugs.devuan.org>.
Last modified: Mon, 23 May 2022 16:39:01 UTC