thr3ads.net - libvirt users - Re: [libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot? [Dec 2018]

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Peter Kukla

2018-Dec-11 14:39 UTC

[libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot?

Hello,
I have a CentOS 7 client running on a CentOS 7 server.  "virsh
--version" reports that 3.9.0 is being used.
I'm issuing a "virsh shutdown" command to shutdown the client.  I
then confirm that the client has actually shutdown using "virsh list
--all".
Lately I've been seeing instances where I shutdown the client, turn away to
work on something else, and then turn back to find that the client has booted
again.
Initially I thought I was mistaken, and that I somehow hadn't properly
shutdown the client, but further experimentation shows that's definitely not
the case.  I've been able to reproduce this repeatedly using the following
steps.
1.  Run "virsh shutdown CLIENT"2.  Wait ~30-60 seconds3.  Run
"virsh list --all; virsh console CLIENT"
If I run "virsh console CLIENT" on its own when the client is in a
shutdown state, I get the expected "error: The domain is not running"
message.  If I omit step #2 and run step #3 immediately after shutting down the
client, virsh also complains that the client's not started and refuses to
open a console.
However, if I add a pause -- step 2, above -- between the shutdown and the
"list --all" commands, then "list --all" shows that the
client is running, and a console is opened to the VM.
I have confirmed that the client boot is definitely being started by the
"list --all" command (and not being started by something else while
I'm not looking) by combining the "list --all" and
"console" commands in step 3.  This is ensuring that the console is
started as soon as the "list --all" is complete, and the resulting
screen output shows the BIOS boot options quickly followed by the kernel boot
messages being dumped to the console.  I can watch the entire boot process from
start to finish.
That pause between the shutdown and the "list --all" is critical. 
I've shutdown the client and then immediately followed it up with the
command:
        watch virsh list --all
...which will run the "list --all" command every 2 seconds.  This will
run indefinitely without triggering the boot, which eliminates the possibility
of the boot occurring due to the amount of time since the shutdown.
It may be that other virsh commands are also causing the client to boot, but
thus far I've only reproduced it using the list --all command.
Can anyone tell me why this is happening?  A bug?  Something in my config? 
Something else?
Thanks in advance,

-peter

.

Jiri Denemark

2018-Dec-12 07:19 UTC

head link

Re: [libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot?

On Tue, Dec 11, 2018 at 14:39:40 +0000, Peter Kukla
wrote:> Hello,
> I have a CentOS 7 client running on a CentOS 7 server.  "virsh
--version" reports that 3.9.0 is being used.
> I'm issuing a "virsh shutdown" command to shutdown the
client.  I then confirm that the client has actually shutdown using "virsh
list --all".
> Lately I've been seeing instances where I shutdown the client, turn
away to work on something else, and then turn back to find that the client has
booted again.
> Initially I thought I was mistaken, and that I somehow hadn't properly
shutdown the client, but further experimentation shows that's definitely not
the case.  I've been able to reproduce this repeatedly using the following
steps.
> 1.  Run "virsh shutdown CLIENT"2.  Wait ~30-60 seconds3.  Run
"virsh list --all; virsh console CLIENT"
> If I run "virsh console CLIENT" on its own when the client is in
a shutdown state, I get the expected "error: The domain is not
running" message.  If I omit step #2 and run step #3 immediately after
shutting down the client, virsh also complains that the client's not started
and refuses to open a console.
> However, if I add a pause -- step 2, above -- between the shutdown and the
"list --all" commands, then "list --all" shows that the
client is running, and a console is opened to the VM.
> I have confirmed that the client boot is definitely being started by the
"list --all" command (and not being started by something else while
I'm not looking) by combining the "list --all" and
"console" commands in step 3.  This is ensuring that the console is
started as soon as the "list --all" is complete, and the resulting
screen output shows the BIOS boot options quickly followed by the kernel boot
messages being dumped to the console.  I can watch the entire boot process from
start to finish.
> That pause between the shutdown and the "list --all" is
critical.  I've shutdown the client and then immediately followed it up with
the command:
>         watch virsh list --all
> ...which will run the "list --all" command every 2 seconds.  This
will run indefinitely without triggering the boot, which eliminates the
possibility of the boot occurring due to the amount of time since the shutdown.
> It may be that other virsh commands are also causing the client to boot,
but thus far I've only reproduced it using the list --all command.
> Can anyone tell me why this is happening?  A bug?  Something in my config? 
Something else?
> Thanks in advance,
This is indeed very strange and we would need to look at the logs to
check what's going on. Could you follow the steps in
https://wiki.libvirt.org/page/DebugLogs#Runtime_setting to enable debug
logs for libvirtd and share the (compressed) libvirtd.log somewhere?

Jirka

Peter Kukla

2018-Dec-13 13:34 UTC

head link

Re: [libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot?

The /etc/libvirt/libvirtd.conf file was modified to include the following:
   log_level = 1   log_filters="3:remote 4:event 3:json 3:rpc" 
 log_outputs="1:file:/var/log/libvirt/libvirtd.log"
The service was then restarted, and I ran "tail -f" against the log to
determine exactly which entries were being created as a result of specific
actions on my part.
I then reproduced the error.
I ran "virsh console proxy2" expecting it to tell me whether the VM
was running, and that resulted in the VM booting.  (So it's not just
"list --all" that's causing the unexpected boots.)  That resulted
in the following chunk of data being written to the log:

2018-12-12 18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:707 :
dispatching to max 0 clients, called from event watch 72018-12-12
18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
18:47:57.361+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:47:57.373+0000: 21323: debug : udevHandleOneDevice:1677 :
udev action: 'add'2018-12-12 18:47:57.373+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'tap3'2018-12-12
18:47:57.374+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'net' for device with sysname
'tap3'2018-12-12 18:47:57.374+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'INTERFACE' value
'tap3' for device with sysname 'tap3'2018-12-12
18:47:57.374+0000: 21323: debug : udevGetDeviceSysfsAttr:217 : Found sysfs
attribute 'address' value 'fe:52:16:f6:1a:8d' for device with
sysname 'tap3'2018-12-12 18:47:57.374+0000: 21323: debug :
udevGetDeviceSysfsAttr:217 : Found sysfs attribute 'addr_len' value
'6' for device with sysname 'tap3'2018-12-12 18:47:57.374+0000:
21323: debug : virFileClose:110 : Closed fd 292018-12-12 18:47:57.375+0000:
21323: debug : virPCIGetDeviceAddressFromSysfsLink:2624 :
'/sys/class/net/tap3/device' does not exist2018-12-12 18:47:57.375+0000:
21323: debug : virFileClose:110 : Closed fd 292018-12-12 18:47:57.375+0000:
21323: info : virObjectNew:254 : OBJECT_NEW: obj=0x7f39f8001f70
classname=virNodeDeviceObj2018-12-12 18:47:57.375+0000: 21323: info :
virObjectRef:388 : OBJECT_REF: obj=0x7f39f8001f702018-12-12 18:47:57.375+0000:
21323: info : virObjectNew:254 : OBJECT_NEW: obj=0x7f39f8002030
classname=virNodeDeviceEventLifecycle2018-12-12 18:47:57.375+0000: 21323: info :
virObjectUnref:350 : OBJECT_UNREF: obj=0x7f39f8001f702018-12-12
18:47:57.375+0000: 21323: info : virObjectUnref:350 : OBJECT_UNREF:
obj=0x7f39f80020302018-12-12 18:47:57.375+0000: 21323: info : virObjectUnref:352
: OBJECT_DISPOSE: obj=0x7f39f80020302018-12-12 18:47:57.375+0000: 21323: debug :
udevHandleOneDevice:1677 : udev action: 'add'2018-12-12
18:47:57.375+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'DRIVER' value '<null>' for device with sysname
'rx-0'2018-12-12 18:47:57.375+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'SUBSYSTEM' value
'queues' for device with sysname 'rx-0'2018-12-12
18:47:57.375+0000: 21323: debug : udevGetDeviceType:1349 : Could not determine
device type for device with sysfs name 'rx-0'2018-12-12
18:47:57.375+0000: 21323: debug : udevAddOneDevice:1541 : Discarding device -1
0x7f39f8001900 /sys/devices/virtual/net/tap3/queues/rx-02018-12-12
18:47:57.375+0000: 21323: debug : udevHandleOneDevice:1677 : udev action:
'add'2018-12-12 18:47:57.375+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'tx-0'2018-12-12
18:47:57.375+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'queues' for device with sysname
'tx-0'2018-12-12 18:47:57.375+0000: 21323: debug :
udevGetDeviceType:1349 : Could not determine device type for device with sysfs
name 'tx-0'2018-12-12 18:47:57.375+0000: 21323: debug :
udevAddOneDevice:1541 : Discarding device -1 0x7f39f8001900
/sys/devices/virtual/net/tap3/queues/tx-02018-12-12 18:47:57.460+0000: 21264:
debug : virNetlinkEventCallback:707 : dispatching to max 0 clients, called from
event watch 72018-12-12 18:47:57.460+0000: 21264: debug :
virNetlinkEventCallback:720 : event not handled.2018-12-12 18:47:57.464+0000:
21323: debug : udevHandleOneDevice:1677 : udev action:
'change'2018-12-12 18:47:57.464+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'kvm'2018-12-12
18:47:57.464+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'misc' for device with sysname
'kvm'2018-12-12 18:47:57.464+0000: 21323: debug : udevGetDeviceType:1349
: Could not determine device type for device with sysfs name
'kvm'2018-12-12 18:47:57.464+0000: 21323: debug : udevAddOneDevice:1541
: Discarding device -1 0x7f39f8001900 /sys/devices/virtual/misc/kvm


I then ran "virsh shutdown proxy2" to stop the VM, resulting in the
following log output:
2018-12-12 18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:707 :
dispatching to max 0 clients, called from event watch 72018-12-12
18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
18:49:24.556+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 18:49:24.561+0000: 21323: debug : udevHandleOneDevice:1677 :
udev action: 'remove'2018-12-12 18:49:24.561+0000: 21323: debug :
udevRemoveOneDevice:1409 : Failed to find device to remove that has udev name
'/sys/devices/virtual/net/tap3/queues/tx-0'2018-12-12 18:49:24.561+0000:
21323: debug : udevHandleOneDevice:1677 : udev action:
'remove'2018-12-12 18:49:24.562+0000: 21323: debug :
udevRemoveOneDevice:1409 : Failed to find device to remove that has udev name
'/sys/devices/virtual/net/tap3/queues/rx-0'2018-12-12 18:49:24.562+0000:
21323: debug : udevHandleOneDevice:1677 : udev action:
'remove'2018-12-12 18:49:24.562+0000: 21323: info : virObjectRef:388 :
OBJECT_REF: obj=0x7f39f8001f702018-12-12 18:49:24.562+0000: 21323: info :
virObjectNew:254 : OBJECT_NEW: obj=0x7f39f80016f0
classname=virNodeDeviceEventLifecycle2018-12-12 18:49:24.562+0000: 21323: debug
: udevRemoveOneDevice:1419 : Removing device
'net_tap3_fe_52_16_f6_1a_8d' with sysfs path
'/sys/devices/virtual/net/tap3'2018-12-12 18:49:24.562+0000: 21323: info
: virObjectRef:388 : OBJECT_REF: obj=0x7f39f8001f702018-12-12 18:49:24.562+0000:
21323: info : virObjectUnref:350 : OBJECT_UNREF: obj=0x7f39f8001f702018-12-12
18:49:24.563+0000: 21323: info : virObjectUnref:350 : OBJECT_UNREF:
obj=0x7f39f8001f702018-12-12 18:49:24.563+0000: 21323: info : virObjectUnref:350
: OBJECT_UNREF: obj=0x7f39f8001f702018-12-12 18:49:24.563+0000: 21323: info :
virObjectUnref:352 : OBJECT_DISPOSE: obj=0x7f39f8001f702018-12-12
18:49:24.563+0000: 21323: info : virObjectUnref:350 : OBJECT_UNREF:
obj=0x7f39f80016f02018-12-12 18:49:24.563+0000: 21323: info : virObjectUnref:352
: OBJECT_DISPOSE: obj=0x7f39f80016f02018-12-12 18:49:24.633+0000: 21264: debug :
virNetlinkEventCallback:707 : dispatching to max 0 clients, called from event
watch 72018-12-12 18:49:24.633+0000: 21264: debug : virNetlinkEventCallback:720
: event not handled.2018-12-12 18:49:24.646+0000: 21323: debug :
udevHandleOneDevice:1677 : udev action: 'change'2018-12-12
18:49:24.646+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'DRIVER' value '<null>' for device with sysname
'kvm'2018-12-12 18:49:24.648+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'SUBSYSTEM' value
'misc' for device with sysname 'kvm'2018-12-12
18:49:24.648+0000: 21323: debug : udevGetDeviceType:1349 : Could not determine
device type for device with sysfs name 'kvm'2018-12-12
18:49:24.648+0000: 21323: debug : udevAddOneDevice:1541 : Discarding device -1
0x7f39f8001560 /sys/devices/virtual/misc/kvm
I then ran "watch virsh list --all" for 10 minutes, and it
continuously showed the VM in a "shut off" state.  Next I ran
"virsh console proxy2" and "virsh list --all" immediately
after killing the "watch" process, and it dumped the following output
to the screen:
[pkukla@vs2 ~]$ virsh console proxy2error: The domain is not running
[pkukla@vs2 ~]$ virsh list --all Id    Name                         
 State---------------------------------------------------- -     proxy2         
               shut off -     proxy2-clone                   shut off

Then I waited ~2-3 minutes and ran "virsh list --all" again, and it
caused the VM to boot:

[pkukla@vs2 ~]$ virsh list --all Id    Name                         
 State---------------------------------------------------- 1     proxy2         
               running -     proxy2-clone                   shut off

The debug output from the log corresponding to this boot sequence:

2018-12-12 19:03:53.712+0000: 21264: debug : virNetlinkEventCallback:707 :
dispatching to max 0 clients, called from event watch 72018-12-12
19:03:53.712+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 19:03:53.712+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
19:03:53.712+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 19:03:53.713+0000: 21264: debug : virNetlinkEventCallback:707
: dispatching to max 0 clients, called from event watch 72018-12-12
19:03:53.713+0000: 21264: debug : virNetlinkEventCallback:720 : event not
handled.2018-12-12 19:03:53.723+0000: 21323: debug : udevHandleOneDevice:1677 :
udev action: 'add'2018-12-12 19:03:53.723+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'tap3'2018-12-12
19:03:53.724+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'net' for device with sysname
'tap3'2018-12-12 19:03:53.724+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'INTERFACE' value
'tap3' for device with sysname 'tap3'2018-12-12
19:03:53.724+0000: 21323: debug : udevGetDeviceSysfsAttr:217 : Found sysfs
attribute 'address' value 'fe:c9:eb:76:37:d8' for device with
sysname 'tap3'2018-12-12 19:03:53.724+0000: 21323: debug :
udevGetDeviceSysfsAttr:217 : Found sysfs attribute 'addr_len' value
'6' for device with sysname 'tap3'2018-12-12 19:03:53.724+0000:
21323: debug : virFileClose:110 : Closed fd 292018-12-12 19:03:53.725+0000:
21323: debug : virPCIGetDeviceAddressFromSysfsLink:2624 :
'/sys/class/net/tap3/device' does not exist2018-12-12 19:03:53.725+0000:
21323: debug : virFileClose:110 : Closed fd 292018-12-12 19:03:53.725+0000:
21323: info : virObjectNew:254 : OBJECT_NEW: obj=0x7f39f8001760
classname=virNodeDeviceObj2018-12-12 19:03:53.725+0000: 21323: info :
virObjectRef:388 : OBJECT_REF: obj=0x7f39f80017602018-12-12 19:03:53.725+0000:
21323: info : virObjectNew:254 : OBJECT_NEW: obj=0x7f39f80017d0
classname=virNodeDeviceEventLifecycle2018-12-12 19:03:53.725+0000: 21323: info :
virObjectUnref:350 : OBJECT_UNREF: obj=0x7f39f80017602018-12-12
19:03:53.725+0000: 21323: info : virObjectUnref:350 : OBJECT_UNREF:
obj=0x7f39f80017d02018-12-12 19:03:53.725+0000: 21323: info : virObjectUnref:352
: OBJECT_DISPOSE: obj=0x7f39f80017d02018-12-12 19:03:53.725+0000: 21323: debug :
udevHandleOneDevice:1677 : udev action: 'add'2018-12-12
19:03:53.725+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'DRIVER' value '<null>' for device with sysname
'tx-0'2018-12-12 19:03:53.725+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'SUBSYSTEM' value
'queues' for device with sysname 'tx-0'2018-12-12
19:03:53.725+0000: 21323: debug : udevGetDeviceType:1349 : Could not determine
device type for device with sysfs name 'tx-0'2018-12-12
19:03:53.725+0000: 21323: debug : udevAddOneDevice:1541 : Discarding device -1
0x7f39f8001f60 /sys/devices/virtual/net/tap3/queues/tx-02018-12-12
19:03:53.725+0000: 21323: debug : udevHandleOneDevice:1677 : udev action:
'add'2018-12-12 19:03:53.725+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'rx-0'2018-12-12
19:03:53.725+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'queues' for device with sysname
'rx-0'2018-12-12 19:03:53.725+0000: 21323: debug :
udevGetDeviceType:1349 : Could not determine device type for device with sysfs
name 'rx-0'2018-12-12 19:03:53.725+0000: 21323: debug :
udevAddOneDevice:1541 : Discarding device -1 0x7f39f8001f60
/sys/devices/virtual/net/tap3/queues/rx-02018-12-12 19:03:53.800+0000: 21264:
debug : virNetlinkEventCallback:707 : dispatching to max 0 clients, called from
event watch 72018-12-12 19:03:53.800+0000: 21264: debug :
virNetlinkEventCallback:720 : event not handled.2018-12-12 19:03:53.804+0000:
21323: debug : udevHandleOneDevice:1677 : udev action:
'change'2018-12-12 19:03:53.804+0000: 21323: debug :
udevGetDeviceProperty:149 : Found property key 'DRIVER' value
'<null>' for device with sysname 'kvm'2018-12-12
19:03:53.804+0000: 21323: debug : udevGetDeviceProperty:149 : Found property key
'SUBSYSTEM' value 'misc' for device with sysname
'kvm'2018-12-12 19:03:53.804+0000: 21323: debug : udevGetDeviceType:1349
: Could not determine device type for device with sysfs name
'kvm'2018-12-12 19:03:53.804+0000: 21323: debug : udevAddOneDevice:1541
: Discarding device -1 0x7f39f8001f60 /sys/devices/virtual/misc/kvm

I then disabled logging and restarted the service.

I've been doing has been under my personal account ("pkukla") on
the server.  The "root" account has production instances, so I have
not been working under that account because I don't want to break anything. 
In fact, I had only noticed this and reproduced it while working in my personal
account, and I originally wasn't sure that it was happening with any other
user accounts.
While collecting this data, however, I am reasonably sure that I managed to boot
one of the VMs in the "root" account with this bug.  I didn't
monitor the VM in the same way that I've been monitoring the bug in my own
account, but a server that shouldn't have been booted did boot around the
time that I was working on the server as "root", and I've
confirmed with the other people with the appropriate privileges to login as
"root", and none of them started the VM.  The VM in the
"root" userspace that was booted was the "slo_redmine" VM. 
I do not know whether it was booted during the time that logging was enabled, so
maybe that is reflected in the log, also?
If I *did* managed to repro the bug while working as "root", then this
implies something else:  This is apparently only affecting VM's in the
user's on environment.  For example, I've been reproducing the trigger
conditions frequently over the past few days to diagnose this, but all of my
testing as user "pkukla" does NOT seem to have affected the VMs in the
"root" user space.  I'm not willing to guarantee that the effects
of this are only confined to a user's own VMs because I haven't
exhaustively tested the theory, but it seems likely that's the case.
The full log has been provided to you as a link in another email.
Please let me know if you have any questions, and thanks again for looking at
this!

Peter Kukla

    On Wednesday, December 12, 2018, 2:19:10 AM EST, Jiri Denemark
<jdenemar@redhat.com> wrote:
 
 On Tue, Dec 11, 2018 at 14:39:40 +0000, Peter Kukla
wrote:> Hello,
> I have a CentOS 7 client running on a CentOS 7 server.  "virsh
--version" reports that 3.9.0 is being used.
> I'm issuing a "virsh shutdown" command to shutdown the
client.  I then confirm that the client has actually shutdown using "virsh
list --all".
> Lately I've been seeing instances where I shutdown the client, turn
away to work on something else, and then turn back to find that the client has
booted again.
> Initially I thought I was mistaken, and that I somehow hadn't properly
shutdown the client, but further experimentation shows that's definitely not
the case.  I've been able to reproduce this repeatedly using the following
steps.
> 1.  Run "virsh shutdown CLIENT"2.  Wait ~30-60 seconds3.  Run
"virsh list --all; virsh console CLIENT"
> If I run "virsh console CLIENT" on its own when the client is in
a shutdown state, I get the expected "error: The domain is not
running" message.  If I omit step #2 and run step #3 immediately after
shutting down the client, virsh also complains that the client's not started
and refuses to open a console.
> However, if I add a pause -- step 2, above -- between the shutdown and the
"list --all" commands, then "list --all" shows that the
client is running, and a console is opened to the VM.
> I have confirmed that the client boot is definitely being started by the
"list --all" command (and not being started by something else while
I'm not looking) by combining the "list --all" and
"console" commands in step 3.  This is ensuring that the console is
started as soon as the "list --all" is complete, and the resulting
screen output shows the BIOS boot options quickly followed by the kernel boot
messages being dumped to the console.  I can watch the entire boot process from
start to finish.
> That pause between the shutdown and the "list --all" is
critical.  I've shutdown the client and then immediately followed it up with
the command:
>         watch virsh list --all
> ...which will run the "list --all" command every 2 seconds.  This
will run indefinitely without triggering the boot, which eliminates the
possibility of the boot occurring due to the amount of time since the shutdown.
> It may be that other virsh commands are also causing the client to boot,
but thus far I've only reproduced it using the list --all command.
> Can anyone tell me why this is happening?  A bug?  Something in my config? 
Something else?
> Thanks in advance,
This is indeed very strange and we would need to look at the logs to
check what's going on. Could you follow the steps in
https://wiki.libvirt.org/page/DebugLogs#Runtime_setting to enable debug
logs for libvirtd and share the (compressed) libvirtd.log somewhere?

Jirka

Michal Privoznik

2018-Dec-13 16:20 UTC

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Re: [libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot?

On 12/11/18 3:39 PM, Peter Kukla wrote:> Hello,
> <snip/>
Could it be that the domain is set as "autostart"? The session daemon
is
slightly different to system daemon. The former come and go if there is
no activity for (by default) 30 seconds. And if the domain would be
marked as 'autostart' (meaning start the domain automatically when the
daemon is being started) the I could imagine this happening.

`virsh dominfo $domain' should tell you that.

Michal

Peter Kukla

2018-Dec-14 15:31 UTC

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Re: [libvirt-users] "virsh list --all" is intermittently causing a shutdown client to boot?

Autostart is set to "enable" for this domain, but I wouldn't
expect autostart to be invoked when a simple "read-only" command is
run.  I'd expect the "list --all" command to only display details
about the domain...not change the status of the domain by booting it.  Maybe
I'm misunderstanding things...



    On Thursday, December 13, 2018, 11:20:30 AM EST, Michal Privoznik
<mprivozn@redhat.com> wrote:
 
 On 12/11/18 3:39 PM, Peter Kukla wrote:> Hello,
> <snip/>
Could it be that the domain is set as "autostart"? The session daemon
is
slightly different to system daemon. The former come and go if there is
no activity for (by default) 30 seconds. And if the domain would be
marked as 'autostart' (meaning start the domain automatically when the
daemon is being started) the I could imagine this happening.

`virsh dominfo $domain' should tell you that.

Michal

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