Le 09/03/2017 à 10:25, Gianluca Cecchi a écrit :

On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:

NOTE: during the snapshot creation I see in web admin console the VM in paused state and also not responsive in both console and ssh session.

After a couple of seconds it comes back and as a confirmation I see this in its messages:

Mar  8 17:38:57 T-ORACLE73 chronyd[616]: System clock wrong by 19.077230 seconds, adjustment started

Is this expected?

Possibly the default changed at some point in time, so that now it saves memory and so this implies pause of VM

Saving memory is essential in some apàplications like DB, so you won't bypass vm pauses for such a stuff

In the mean time I verified changing backup.py this way solves the problem (the 3.6 api deprecation still in place... ;-):

$ diff backup.py backup.py.orig 

123c123

<                     vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(), vm=vm,persist_memorystate=False))

---

>                     vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(), vm=vm))

The snapshot doesn't include memory and no problem at VM OS side now

Tested also getting the parameter from config file

Modifications needed in this case:

1)

$ diff backup.py backup.py.orig 

123c123

<                     vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(), vm=vm,persist_memorystate=config.get_persist_memorystate()))

---

>                     vm.snapshots.add(params.Snapshot(description=config.get_snapshot_description(), vm=vm))

2)

$ diff config.py config.py.orig 

34d33

<             self.__persist_memorystate = config_parser.getboolean(section, "persist_memorystate")

113,116d111

< 

< 

<     def get_persist_memorystate(self):

<         return self.__persist_memorystate

And in config file called add:

# Save Memory in snapshot

persist_memorystate=False

It could be further improved if one wants to differentiate save memory for some VMs and not for other ones....

HIH other ones,

Gianluca

-- 
Nathanaël Blanchet

Supervision réseau
Pôle Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 	
Tél. 33 (0)4 67 54 84 55
Fax  33 (0)4 67 54 84 14
blanchet@abes.fr 

_______________________________________________
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users