From raphael.awadallah at gmail.com Sun Jan 29 15:42:05 2017 Content-Type: multipart/mixed; boundary="===============2075546452421586505==" MIME-Version: 1.0 From: raphael awadallah To: users at ovirt.org Subject: [ovirt-users] oVirt VM backup and restore Date: Sun, 29 Jan 2017 17:42:04 +0200 Message-ID: --===============2075546452421586505== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Dears Engineers, I hope you are doing great, I wish you can help me with a tutorial that shows how to take a scheduled backups for virtual machines running on oVirt node 4 and how to restore them. Best regards --===============2075546452421586505== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+PGRpdj48ZGl2PjxkaXY+RGVhcnMgRW5naW5lZXJzLDxicj48L2Rpdj5J IGhvcGUgeW91IGFyZSBkb2luZyBncmVhdCw8YnI+PC9kaXY+SQogd2lzaCB5b3UgY2FuIGhlbHAg bWUgd2l0aCBhIHR1dG9yaWFsIHRoYXQgc2hvd3MgaG93IHRvIHRha2UgYSBzY2hlZHVsZWQKIGJh Y2t1cHMgZm9yIHZpcnR1YWwgbWFjaGluZXMgcnVubmluZyBvbiBvVmlydCBub2RlIDQgYW5kIGhv dyB0byByZXN0b3JlCiB0aGVtLjxicj48L2Rpdj5CZXN0IHJlZ2FyZHM8L2Rpdj4K --===============2075546452421586505==-- From blanchet at abes.fr Mon Jan 30 09:44:27 2017 Content-Type: multipart/mixed; boundary="===============1865410280245310792==" MIME-Version: 1.0 From: =?utf-8?q?Nathana=C3=ABl_Blanchet_=3Cblanchet_at_abes=2Efr=3E?= To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Mon, 30 Jan 2017 10:44:22 +0100 Message-ID: In-Reply-To: CAGGxq7AkyWx1tkV1KP=gpRPNvRdZOCYf6DNv8bF6EUdJDW-vNg@mail.gmail.com --===============1865410280245310792== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable This is a multi-part message in MIME format. --------------16A7F177EB0A59ABACA4F367 Content-Type: text/plain; charset=3Dwindows-1252; format=3Dflowed Content-Transfer-Encoding: quoted-printable Hello, * With ovirt <=3D3D 4.1 and ovirtsdk3 : https://github.com/wefixit-AT/oVirtBackup This workflow works fine but will be soon deprecated. * With ovirt > 4.0, jhernandez has recently posted a new python script based on the new v4 API : https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/vm= =3D _backup.py I personnally didn't try it, maybe someone could give a feedback. Le 29/01/2017 =3DE0 16:42, raphael awadallah a =3DE9crit : > Dears Engineers, > I hope you are doing great, > I wish you can help me with a tutorial that shows how to take a=3D20 > scheduled backups for virtual machines running on oVirt node 4 and how=3D= 20 > to restore them. > Best regards > > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users --=3D20 Nathana=3DEBl Blanchet Supervision r=3DE9seau P=3DF4le Infrastrutures Informatiques 227 avenue Professeur-Jean-Louis-Viala 34193 MONTPELLIER CEDEX 5 =3D09 T=3DE9l. 33 (0)4 67 54 84 55 Fax 33 (0)4 67 54 84 14 blanchet(a)abes.fr --------------16A7F177EB0A59ABACA4F367 Content-Type: text/html; charset=3Dwindows-1252 Content-Transfer-Encoding: quoted-printable

Hello,

With ovirt <=3D3D 4.1 and ovirtsdk3 : https://github.com/wefixit-AT/oVirtBackup

This workflow works fine but will be soon deprecated.

With ovirt > 4.0, jhernandez has recently posted a new python script based on the new v4 API : https://github.com/oVi= =3D rt/ovirt-engine-sdk/blob/master/sdk/examples/vm_backup.py

I personnally didn't try it, maybe someone could give a feedback.<= =3D br>

Le 29/01/2017 =3DE0 16:42, raphael awadallah a =3DE9crit=3DA0:

Dears Engineers,

I hope you are doing great,

I wish you can help me with a tutorial that shows how to take a scheduled backups for virtual machines running on oVirt node 4 and how to restore them.

Best regards
_______________________________________________
Users mailing list
Use=3D
rs(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users

--=3D20
Nathana=3DEBl Blanchet

Supervision r=3DE9seau
P=3DF4le Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 =3D09
T=3DE9l. 33 (0)4 67 54 84 55
Fax  33 (0)4 67 54 84 14
bl=3D
anchet(a)abes.fr

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great, > I wish you can help me with a tutorial that shows how to take a scheduled > backups for virtual machines running on oVirt node 4 and how to restore > them. >From oVirt's project point of view, we only supply an API for this, no actual end-user tools. See also: https://www.ovirt.org/develop/release-management/features/storage/backup-re= store-api-integration/ If you search the net for e.g. 'ovirt backup vms', you can find lots of stu= ff - actual tools, blog posts, mailing lists/forum discussions, etc. Many of these were also mentioned/discussed on this list over the years, so you can search also the list archives. Personally I do not have experience with any of the tools, so can't comment. If you need help with something specific you are trying to do - such as use one of the existing tools, or use the api directly, etc. - then please prov= ide more details about what you are trying to do and what problems you run into. Best, -- = Didi --===============5062788794708455536==-- From Daniel.Beckman at ingramcontent.com Tue Feb 7 17:05:49 2017 Content-Type: multipart/mixed; boundary="===============2262405082255864175==" MIME-Version: 1.0 From: Beckman, Daniel To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Tue, 07 Feb 2017 17:05:41 +0000 Message-ID: <3077455A-E956-4D36-B705-CA0980B7028E@ingramcontent.com> In-Reply-To: c11c381a-62b3-9bdd-df1e-14d984901b05@abes.fr --===============2262405082255864175== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_3077455AE9564D36B705CA0980B7028Eingramcontentcom_ Content-Type: text/plain; charset=3DUTF-8 Content-Transfer-Encoding: base64 V2XigJlyZSBiZWVuIHVzaW5nIG9WaXJ0QmFja3VwIHdpdGggb3VyIG9WaXJ0IDQuMC41IGVudmly b25tZW50IGFuZCBpdOKAmXMgd29ya2VkIHdlbGwuIEl04oCZcyBub3QgdGhlIG1vc3QgZWZmaWNp ZW50ICggZmlyc3QgY3JlYXRlcyBhIHNuYXBzaG90LCB0aGVuIGNsb25lLCB0aGVuIGJhY2t1cCkg 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In-Reply-To: 3077455A-E956-4D36-B705-CA0980B7028E@ingramcontent.com --===============4038303598028578496== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Tue, Feb 7, 2017 at 6:05 PM, Beckman, Daniel < Daniel.Beckman(a)ingramcontent.com> wrote: > We=E2=80=99re been using oVirtBackup with our oVirt 4.0.5 environment and= it=E2=80=99s > worked well. It=E2=80=99s not the most efficient ( first creates a snapsh= ot, then > clone, then backup) but we can live with it. > > > > Has anyone tested oVirtBackup with oVirt 4.1? Does it still work? I want > to know before we upgrade. I=E2=80=99d like to eventually use the new v4 = API but I > haven=E2=80=99t seen a lot of documentation on how it works in practice. > > > > Thanks, > > Daniel > > > > *From: * on behalf of Nathana=C3=ABl Blanchet < > blanchet(a)abes.fr> > *Date: *Monday, January 30, 2017 at 3:44 AM > *To: *"users(a)ovirt.org" > *Subject: *Re: [ovirt-users] oVirt VM backup and restore > > > > Hello, > > - With ovirt <=3D 4.1 and ovirtsdk3 : https://github.com/wefixit-AT/ > oVirtBackup > > This workflow works fine but will be soon deprecated. > > - With ovirt > 4.0, jhernandez has recently posted a new python script > based on the new v4 API : https://github.com/oVirt/ > ovirt-engine-sdk/blob/master/sdk/examples/vm_backup.py > > > I personnally didn't try it, maybe someone could give a feedback. > > > I'm running some tests in a 4.1 testenvironment. At the moment testing on a Oracle Linux 7.3 VM - using oVirtBackup from master (version is on 3rd of July 2016) $ ./backup.py -c config_test.cfg Mar 08 17:37:08: Start backup for: Oracle7 Mar 08 17:37:09: Snapshot creation started ... Mar 08 17:38:23: Snapshot created Mar 08 17:38:33: Clone into VM started ... Mar 08 17:40:31: Cloning finished Mar 08 17:40:32: Snapshot deletion started ... Mar 08 17:41:53: Snapshots deleted Mar 08 17:41:54: Export started ... Mar 08 17:43:56: Exporting finished Mar 08 17:43:57: Delete cloned VM started ... Mar 08 17:44:01: Cloned VM deleted Mar 08 17:44:01: Duration: 6:54 minutes Mar 08 17:44:01: VM exported as Oracle7_BACKUP_20170308_173708 Mar 08 17:44:01: Backup done for: Oracle7 Mar 08 17:44:01: All backups done 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? Not yet used the vm_backup.py, I;m trying to get sdk4 on Fedora 25 before (see the other thread I opened)... 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L2Rpdj48L2Rpdj48L2Rpdj4K --===============4038303598028578496==-- From gianluca.cecchi at gmail.com Thu Mar 9 09:25:46 2017 Content-Type: multipart/mixed; boundary="===============6949238966698066811==" MIME-Version: 1.0 From: Gianluca Cecchi To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 10:25:44 +0100 Message-ID: In-Reply-To: CAG2kNCy007Chduq-33hc_fYFHhQKJD6s-niuCRfxWKrzMEcOYw@mail.gmail.com --===============6949238966698066811== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi 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 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=3Dconfig.get_snapshot_descript= ion(), vm=3Dvm,persist_memorystate=3DFalse)) --- > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descript= ion(), vm=3Dvm)) 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=3Dconfig.get_snapshot_descript= ion(), vm=3Dvm,persist_memorystate=3Dconfig.get_persist_memorystate())) --- > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descript= ion(), vm=3Dvm)) 2) $ diff config.py config.py.orig 34d33 < self.__persist_memorystate =3D 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=3DFalse It could be further improved if one wants to differentiate save memory for some VMs and not for other ones.... 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state and also not responsive in both console and ssh sessi= on. > 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 > = > 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=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm,persist_memorystate=3DFalse)) > --- >> = > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm)) > = > 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=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm,persist_memorystate=3Dconfig.get_persist_memorystate())) > --- >> = > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm)) > = > = > 2) > $ diff config.py config.py.orig = > 34d33 > < self.__persist_memorystate =3D > 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=3DFalse > = > It could be further improved if one wants to differentiate save memory > for some VMs and not for other ones.... > = > HIH other ones, > Gianluca > = Very good point Gialuca, you are right, the 'persist_memorystate' flag is 'true' by default, and that makes the pause longer. Would you be so kind to add it to the 'vm_backup.py' example that is part of version 4 of the SDK? https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/vm_backu= p.py#L143-L151 (Note that that Gibhub is just a mirror, the change needs to be submited using gerrit.ovirt.org). --===============5931147285983469853==-- From gianluca.cecchi at gmail.com Thu Mar 9 10:11:06 2017 Content-Type: multipart/mixed; boundary="===============6946733897905651852==" MIME-Version: 1.0 From: Gianluca Cecchi To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 11:11:03 +0100 Message-ID: In-Reply-To: 0a16e3ae-861a-da4a-fbde-8d3fe3aa8ec8@redhat.com --===============6946733897905651852== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Mar 9, 2017 at 10:58 AM, Juan Hern=C3=A1ndez wrote: > > > Very good point Gialuca, you are right, the 'persist_memorystate' flag > is 'true' by default, and that makes the pause longer. Would you be so > kind to add it to the 'vm_backup.py' example that is part of version 4 > of the SDK? > > > https://github.com/oVirt/ovirt-engine-sdk/blob/master/ > sdk/examples/vm_backup.py#L143-L151 > > (Note that that Gibhub is just a mirror, the change needs to be submited > using gerrit.ovirt.org). > > > I already verified (on a 4.1 infra) that changing vm_backup.py downloaded yesterday from master this way (apart connection paramters): $ diff vm_backup.py vm_backup.py.orig 150d149 < persist_memorystate=3DFalse, I get the backup result and snapshot is correctly without memory saved (and no pause at VM side) In engine events I get: Mar 9, 2017 10:50:39 AM Snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' deletion for VM 'Oracle7' has been completed. Mar 9, 2017 10:49:48 AM Backup of virtual machine 'Oracle7' using snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' is completed. Mar 9, 2017 10:49:48 AM Snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' deletion for VM 'Oracle7' was initiated by admin(a)internal-authz. Mar 9, 2017 10:49:47 AM Disk Oracle7_Disk1 was successfully detached from VM c7testovn1 by admin(a)internal-authz. Mar 9, 2017 10:49:45 AM Disk Oracle7_Disk1 was successfully attached to VM c7testovn1 by admin(a)internal-authz. Mar 9, 2017 10:49:41 AM Snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' creation for VM 'Oracle7' has been completed. Mar 9, 2017 10:49:29 AM Snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' creation for VM 'Oracle7' was initiated by admin(a)internal-authz. Mar 9, 2017 10:49:28 AM Backup of virtual machine 'Oracle7' using snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' is starting. I have almost no experience in gerrit/github, unfortunately... only a beginner experience in svn ... ;-) If you give me some pointers I can try to apply what you asked... 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03/09/2017 11:11 AM, Gianluca Cecchi wrote: > On Thu, Mar 9, 2017 at 10:58 AM, Juan Hern=C3=A1ndez > wrote: > = > = > = > Very good point Gialuca, you are right, the 'persist_memorystate' flag > is 'true' by default, and that makes the pause longer. Would you be so > kind to add it to the 'vm_backup.py' example that is part of version 4 > of the SDK? > = > = > https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/vm= _backup.py#L143-L151 > > = > (Note that that Gibhub is just a mirror, the change needs to be submi= ted > using gerrit.ovirt.org ). > = > = > = > I already verified (on a 4.1 infra) that changing vm_backup.py > downloaded yesterday from master this way (apart connection paramters): > = > $ diff vm_backup.py vm_backup.py.orig = > 150d149 > < persist_memorystate=3DFalse, > = > I get the backup result and snapshot is correctly without memory saved > (and no pause at VM side) > = > In engine events I get: > = > Mar 9, 2017 10:50:39 AM Snapshot > 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' deletion for VM > 'Oracle7' has been completed. > Mar 9, 2017 10:49:48 AM Backup of virtual machine 'Oracle7' using > snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' is complet= ed. > Mar 9, 2017 10:49:48 AM Snapshot > 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' deletion for VM > 'Oracle7' was initiated by admin(a)internal-authz. > Mar 9, 2017 10:49:47 AM Disk Oracle7_Disk1 was successfully detached > from VM c7testovn1 by admin(a)internal-authz. > Mar 9, 2017 10:49:45 AM Disk Oracle7_Disk1 was successfully attached to > VM c7testovn1 by admin(a)internal-authz. > Mar 9, 2017 10:49:41 AM Snapshot > 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' creation for VM > 'Oracle7' has been completed. > Mar 9, 2017 10:49:29 AM Snapshot > 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' creation for VM > 'Oracle7' was initiated by admin(a)internal-authz. > Mar 9, 2017 10:49:28 AM Backup of virtual machine 'Oracle7' using > snapshot 'Oracle7-backup-c6bf637e-cdeb-4923-a39f-55a14d7bad7b' is startin= g. > = > = > I have almost no experience in gerrit/github, unfortunately... only a > beginner experience in svn ... ;-) > If you give me some pointers I can try to apply what you asked... > = > Gianluca I see that you already have a gerrit.ovirt.org, so it shouldn't be difficult. The initial setup should be like this: $ git config --global user.name youruser $ git config --global user.email your(a)email $ git clone ssh://youruser(a)gerrit.ovirt.org:29418/ovirt-engine-sdk $ gitdir=3D$(git rev-parse --git-dir); scp -p -P 29418 youruser(a)gerrit.ovirt.org:hooks/commit-msg ${gitdir}/hooks/ Then, to submit the patch: $ cd ovirt-engine-sdk $ Edit the vm_backup.py file, and make your changes. $ git commit -a -s $ git push origin HEAD:refs/for/master --===============0548973323330231271==-- From blanchet at abes.fr Thu Mar 9 10:39:40 2017 Content-Type: multipart/mixed; boundary="===============6554393314423803611==" MIME-Version: 1.0 From: =?utf-8?q?Nathana=C3=ABl_Blanchet_=3Cblanchet_at_abes=2Efr=3E?= To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 11:39:35 +0100 Message-ID: <2c00e42b-1a6f-b718-2d3b-7ccc8df7cc78@abes.fr> In-Reply-To: CAG2kNCy-F6KF0ckEbFqWuXYQkroMZRVigPHvuhsrK=EvBBOTpQ@mail.gmail.com --===============6554393314423803611== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable This is a multi-part message in MIME format. --------------DF760123B34BA11C0A26BA44 Content-Type: text/plain; charset=3Dutf-8; format=3Dflowed Content-Transfer-Encoding: quoted-printable Le 09/03/2017 =3DC3=3DA0 10:25, Gianluca Cecchi a =3DC3=3DA9crit : > On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi=3D20 > > 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=3D20 > saves memory and so this implies pause of VM Saving memory is essential in some ap=3DC3=3DA0plications like DB, so you w= on=3D 't=3D20 bypass vm pauses for such a stuff > In the mean time I verified changing backup.py this way solves the=3D20 > problem (the 3.6 api deprecation still in place... ;-): > > $ diff backup.py backup.py.orig > 123c123 > <=3D20 > vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_desc= =3D ription(),=3D20 > vm=3D3Dvm,persist_memorystate=3D3DFalse)) > --- > >=3D20 > vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_desc= =3D ription(),=3D20 > vm=3D3Dvm)) > > 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 > <=3D20 > vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_desc= =3D ription(),=3D20 > vm=3D3Dvm,persist_memorystate=3D3Dconfig.get_persist_memorystate())) > --- > >=3D20 > vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_desc= =3D ription(),=3D20 > vm=3D3Dvm)) > > > 2) > $ diff config.py config.py.orig > 34d33 > < self.__persist_memorystate =3D3D=3D20 > 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=3D3DFalse > > It could be further improved if one wants to differentiate save memory=3D= 20 > for some VMs and not for other ones.... > > HIH other ones, > Gianluca --=3D20 Nathana=3DC3=3DABl Blanchet Supervision r=3DC3=3DA9seau P=3DC3=3DB4le Infrastrutures Informatiques 227 avenue Professeur-Jean-Louis-Viala 34193 MONTPELLIER CEDEX 5 =3D09 T=3DC3=3DA9l. 33 (0)4 67 54 84 55 Fax 33 (0)4 67 54 84 14 blanchet(a)abes.fr --------------DF760123B34BA11C0A26BA44 Content-Type: text/html; charset=3Dutf-8 Content-Transfer-Encoding: quoted-printable

Le 09/03/2017 =3DC3=3DA0 10:25, Gianlu= ca C=3D ecchi a =3DC3=3DA9crit=3DC2=3DA0:

On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi <gianluca.cecchi(a)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 =3DC2=3DA08 17:38:57 T-ORACLE73 chronyd[616]: = Sy=3D stem 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 ap=3DC3=3DA0plications like DB, so y= ou 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=3DC2= =3DA0=3D

123c123

< =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA= 0 =3DC2=3DA0 =3DC2=3D =3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_descri= =3D ption(), vm=3D3Dvm,persist_memorystate=3D3DFalse))

---

> =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA= 0 =3DC2=3DA0 =3DC2=3D =3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_descri= =3D ption(), vm=3D3Dvm))

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=3DC2= =3DA0=3D

123c123

< =3DC2=3DA0 =3DC2=3DA0 =3DC2= =3DA0 =3DC2=3DA0 =3DC2=3D =3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_descri= =3D ption(), vm=3D3Dvm,persist_memorystate=3D3Dconfig.get_persist_memorystate()))

---

> =3DC2=3DA0 =3DC2=3DA0 =3DC2= =3DA0 =3DC2=3DA0 =3DC2=3D =3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 vm.snapshots.add(params.Snapshot(description=3D3Dconfig.get_snapshot_descri= =3D ption(), vm=3D3Dvm))

2)

$ diff config.py config.py.orig=3DC2=3DA0

34d33

< =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2= =3DA0 =3DC2=3DA0 self.__=3D persist_memorystate =3D3D config_parser.getboolean(section, "persist_memorystate")<= =3D /div>
113,116d111

<=3DC2=3DA0

<=3DC2=3DA0

< =3DC2=3DA0 =3DC2=3DA0 def get_persist_memorystate(s= elf):<=3D /div>
< =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 =3DC2=3DA0 return = self.__persist=3D _memorystate

And in config file called add:

# Save Memory in snapshot

persist_memorystate=3D3DFalse

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

HIH other ones,

Gianluca

--=3D20
Nathana=3DC3=3DABl Blanchet

Supervision r=3DC3=3DA9seau
P=3DC3=3DB4le Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 =3D09
T=3DC3=3DA9l. 33 (0)4 67 54 84 55
Fax  33 (0)4 67 54 84 14
bl=3D
anchet(a)abes.fr

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NTQgODQgNTUKRmF4ICAzMyAoMCk0IDY3IDU0IDg0IDE0CjxhIGNsYXNzPTNEIm1vei10eHQtbGlu ay1hYmJyZXZpYXRlZCIgaHJlZj0zRCJtYWlsdG86YmxhbmNoZXRAYWJlcy5mciI+Ymw9CmFuY2hl dEBhYmVzLmZyPC9hPiA8L3ByZT4KICA8L2JvZHk+CjwvaHRtbD4KCi0tLS0tLS0tLS0tLS0tREY3 NjAxMjNCMzRCQTExQzBBMjZCQTQ0LS0K --===============6554393314423803611==-- From ykaul at redhat.com Thu Mar 9 10:56:29 2017 Content-Type: multipart/mixed; boundary="===============0579616544108354692==" MIME-Version: 1.0 From: Yaniv Kaul To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 10:56:17 +0000 Message-ID: In-Reply-To: 2c00e42b-1a6f-b718-2d3b-7ccc8df7cc78@abes.fr --===============0579616544108354692== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Mar 9, 2017 at 12:40 PM Nathana=C3=ABl Blanchet wrote: > > > Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : > > On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi > 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 ap=C3=A0plications like DB, so you won= 't > bypass vm pauses for such a stuff > In a database, you actually want to ensure all transactions are complete for an application-complete snapshot. I don't think memory is needed. Y. > > 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=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm,persist_memorystate=3DFalse)) > --- > > > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm)) > > 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=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm,persist_memorystate=3Dconfig.get_persist_memorystate())) > --- > > > vm.snapshots.add(params.Snapshot(description=3Dconfig.get_snapshot_descri= ption(), > vm=3Dvm)) > > > 2) > $ diff config.py config.py.orig > 34d33 > < self.__persist_memorystate =3D > 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=3DFalse > > It could be further improved if one wants to differentiate save memory for > some VMs and not for other ones.... > > HIH other ones, > Gianluca > > > -- > Nathana=C3=ABl Blanchet > > Supervision r=C3=A9seau > P=C3=B4le Infrastrutures Informatiques > 227 avenue Professeur-Jean-Louis-Viala > 34193 MONTPELLIER CEDEX 5 = > T=C3=A9l. 33 (0)4 67 54 84 55 > Fax 33 (0)4 67 54 84 14blanchet(a)abes.fr > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > --===============0579616544108354692== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" 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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 ap=C3=A0plications like DB, so you won= 't > bypass vm pauses for such a stuff > > Yes, indeed, the important thing is to have an option so that you can set it True or False, depending on the VM you are saving, the application that is running isnide it and the way you want to do backup of the application. Nevertheless, RDBMS and also other applications often have some mechanism to be "frozen in a consistent state" so that you can save what you have on disk without need to save memory to have a consistent backup. Oracle for example has functionality to be put in "backup mode" where you issue "begin backup" before the snapshot and "end backup" right after snapshot completion. I see that POstgreSQL has similar functionality (not tested myself): https://www.postgresql.org/docs/9.4/static/continuous-archiving.html#BACKUP= -LOWLEVEL-BASE-BACKUP and the same for other ones. 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think it would be very handy to be able to choose to save the memory state or not. As for anything requiring the memory state depends very much on what your recovery procedure is. Gianluca, PostgreSQL pg_start / end backup works very well. I can't remember exactly how it works but it's something along the lines of stopping (disk) writes to the database and storing change in WAL (redo in oracle speak) until the backup is complete then applying any changes to the database files on disk. Basically means that the database files won't change during the backup process. On 9 March 2017 at 10:57, Gianluca Cecchi wro= te: > On Thu, Mar 9, 2017 at 11:39 AM, Nathana=C3=ABl Blanchet > wrote: > >> >> >> Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : >> >> On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi < >> gianluca.cecchi(a)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 ap=C3=A0plications like DB, so you wo= n't >> bypass vm pauses for such a stuff >> >> > Yes, indeed, the important thing is to have an option so that you can set > it True or False, depending on the VM you are saving, the application that > is running isnide it and the way you want to do backup of the application. > Nevertheless, RDBMS and also other applications often have some mechanism > to be "frozen in a consistent state" so that you can save what you have on > disk without need to save memory to have a consistent backup. > Oracle for example has functionality to be put in "backup mode" where you > issue "begin backup" before the snapshot and "end backup" right after > snapshot completion. > I see that POstgreSQL has similar functionality (not tested myself): > https://www.postgresql.org/docs/9.4/static/continuous- > archiving.html#BACKUP-LOWLEVEL-BASE-BACKUP > and the same for other ones. > > Gianluca > > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > --===============7846907753157189516== Content-Type: text/html MIME-Version: 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Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On 03/09/2017 11:57 AM, Gianluca Cecchi wrote: > On Thu, Mar 9, 2017 at 11:39 AM, Nathana=C3=ABl Blanchet > wrote: > = > = > = > Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : >> On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi >> > w= rote: >> >> >> >> 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 ap=C3=A0plications like DB, so you > won't bypass vm pauses for such a stuff > = > = > Yes, indeed, the important thing is to have an option so that you can > set it True or False, depending on the VM you are saving, the > application that is running isnide it and the way you want to do backup > of the application. > Nevertheless, RDBMS and also other applications often have some > mechanism to be "frozen in a consistent state" so that you can save what > you have on disk without need to save memory to have a consistent backup. > Oracle for example has functionality to be put in "backup mode" where > you issue "begin backup" before the snapshot and "end backup" right > after snapshot completion. > I see that POstgreSQL has similar functionality (not tested myself): > https://www.postgresql.org/docs/9.4/static/continuous-archiving.html#BACK= UP-LOWLEVEL-BASE-BACKUP > and the same for other ones. > = > Gianluca = > = Just wanted to add that freezing activity is not only important for databases, but also for plain file systems. In order to do a consistent backup it is important to freeze the file systems before creating a live snapshot, and thaw it afterwards. oVirt does that automatically, but only if the guest agent is installed and running. So, remember to have the guest agent installed and running in the virtual machines that you plan to backup using this mechanism. --===============2555879803689549096==-- From matonb at ltresources.co.uk Thu Mar 9 11:12:00 2017 Content-Type: multipart/mixed; boundary="===============8505252931391705128==" MIME-Version: 1.0 From: Maton, Brett To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 11:11:57 +0000 Message-ID: In-Reply-To: 20f43574-db1e-1a64-92b5-00a0dd557374@redhat.com --===============8505252931391705128== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Good point On 9 March 2017 at 11:10, Juan Hern=C3=A1ndez wrote: > On 03/09/2017 11:57 AM, Gianluca Cecchi wrote: > > On Thu, Mar 9, 2017 at 11:39 AM, Nathana=C3=ABl Blanchet > > wrote: > > > > > > > > Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : > >> On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi > >> > > 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 ap=C3=A0plications like DB, so y= ou > > won't bypass vm pauses for such a stuff > > > > > > Yes, indeed, the important thing is to have an option so that you can > > set it True or False, depending on the VM you are saving, the > > application that is running isnide it and the way you want to do backup > > of the application. > > Nevertheless, RDBMS and also other applications often have some > > mechanism to be "frozen in a consistent state" so that you can save what > > you have on disk without need to save memory to have a consistent backu= p. > > Oracle for example has functionality to be put in "backup mode" where > > you issue "begin backup" before the snapshot and "end backup" right > > after snapshot completion. > > I see that POstgreSQL has similar functionality (not tested myself): > > https://www.postgresql.org/docs/9.4/static/continuous- > archiving.html#BACKUP-LOWLEVEL-BASE-BACKUP > > and the same for other ones. > > > > Gianluca > > > > Just wanted to add that freezing activity is not only important for > databases, but also for plain file systems. In order to do a consistent > backup it is important to freeze the file systems before creating a live > snapshot, and thaw it afterwards. oVirt does that automatically, but > only if the guest agent is installed and running. So, remember to have > the guest agent installed and running in the virtual machines that you > plan to backup using this mechanism. > > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > --===============8505252931391705128== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+R29vZCBwb2ludDxicj48L2Rpdj48ZGl2IGNsYXNzPSJnbWFpbF9leHRy YSI+PGJyPjxkaXYgY2xhc3M9ImdtYWlsX3F1b3RlIj5PbiA5IE1hcmNoIDIwMTcgYXQgMTE6MTAs IEp1YW4gSGVybsOhbmRleiA8c3BhbiBkaXI9Imx0ciI+Jmx0OzxhIGhyZWY9Im1haWx0bzpqaGVy bmFuZEByZWRoYXQuY29tIiB0YXJnZXQ9Il9ibGFuayI+amhlcm5hbmRAcmVkaGF0LmNvbTwvYT4m Z3Q7PC9zcGFuPiB3cm90ZTo8YnI+PGJsb2NrcXVvdGUgY2xhc3M9ImdtYWlsX3F1b3RlIiBzdHls ZT0ibWFyZ2luOjAgMCAwIC44ZXg7Ym9yZGVyLWxlZnQ6MXB4ICNjY2Mgc29saWQ7cGFkZGluZy1s ZWZ0OjFleCI+PHNwYW4gY2xhc3M9IiI+T24gMDMvMDkvMjAxNyAxMTo1NyBBTSwgR2lhbmx1Y2Eg 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at gmail.com Thu Mar 9 11:22:28 2017 Content-Type: multipart/mixed; boundary="===============7397576195365331248==" MIME-Version: 1.0 From: Gianluca Cecchi To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 12:22:26 +0100 Message-ID: In-Reply-To: CAAn8SBEpAcwrRCc=osiVrqVFjPMK_=7m9wbV7JuPC7E+25JVKA@mail.gmail.com --===============7397576195365331248== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Mar 9, 2017 at 12:11 PM, Maton, Brett wrote: > Good point > > >> Just wanted to add that freezing activity is not only important for >> databases, but also for plain file systems. In order to do a consistent >> backup it is important to freeze the file systems before creating a live >> snapshot, and thaw it afterwards. oVirt does that automatically, but >> only if the guest agent is installed and running. So, remember to have >> the guest agent installed and running in the virtual machines that you >> plan to backup using this mechanism. >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> > > Yes, indeed. I forgot to write it before, but I did verify that my VM with guest agent installed had this inside its /var/log/messages file: Mar 9 10:49:36 T-ORACLE73 qemu-ga: info: guest-fsfreeze called Mar 9 10:49:36 T-ORACLE73 qemu-ga: info: executing fsfreeze hook with arg 'freeze' Mar 9 10:49:37 T-ORACLE73 qemu-ga: info: executing fsfreeze hook with arg 'thaw' Also, with vm_backup.py utility, I verified that inside the VM where the snapshotted disk was attached (c7testovn1), I got this: Mar 9 10:49:42 c7testovn1 kernel: pci 0000:00:09.0: BAR 4: assigned [mem 0x40000000-0x40003fff 64bit pref] Mar 9 10:49:42 c7testovn1 kernel: pci 0000:00:09.0: BAR 1: assigned [mem 0x40004000-0x40004fff] Mar 9 10:49:42 c7testovn1 kernel: pci 0000:00:09.0: BAR 0: assigned [io 0x1000-0x103f] Mar 9 10:49:42 c7testovn1 kernel: virtio-pci 0000:00:09.0: enabling device (0000 -> 0003) Mar 9 10:49:42 c7testovn1 kernel: vdb: vdb1 vdb2 Mar 9 10:49:42 c7testovn1 systemd: Starting LVM2 PV scan on device 252:18... Mar 9 10:49:42 c7testovn1 lvm: 2 logical volume(s) in volume group "mainvg" now active Mar 9 10:49:42 c7testovn1 systemd: Started LVM2 PV scan on device 252:18. Mar 9 10:49:44 c7testovn1 systemd: Stopping LVM2 PV scan on device 252:18... Mar 9 10:49:44 c7testovn1 lvm: Device 252:18 not found. Cleared from lvmetad cache. Mar 9 10:49:44 c7testovn1 systemd: Stopped LVM2 PV scan on device 252:18. 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c2NhbiBvbiBkZXZpY2UgMjUyOjE4Li4uPC9kaXY+PGRpdiBjbGFzcz0iZ21haWxfZXh0cmEiPk1h ciDCoDkgMTA6NDk6NDQgYzd0ZXN0b3ZuMSBsdm06IERldmljZSAyNTI6MTggbm90IGZvdW5kLiBD bGVhcmVkIGZyb20gbHZtZXRhZCBjYWNoZS48L2Rpdj48ZGl2IGNsYXNzPSJnbWFpbF9leHRyYSI+ TWFyIMKgOSAxMDo0OTo0NCBjN3Rlc3Rvdm4xIHN5c3RlbWQ6IFN0b3BwZWQgTFZNMiBQViBzY2Fu IG9uIGRldmljZSAyNTI6MTguPC9kaXY+PGRpdj48YnI+PC9kaXY+PGRpdj5HaWFubHVjYTwvZGl2 PjwvZGl2PjxkaXY+PGJyPjwvZGl2PjwvZGl2PjwvZGl2Pgo= --===============7397576195365331248==-- From blanchet at abes.fr Thu Mar 9 13:10:20 2017 Content-Type: multipart/mixed; boundary="===============5832029283529377107==" MIME-Version: 1.0 From: =?utf-8?q?Nathana=C3=ABl_Blanchet_=3Cblanchet_at_abes=2Efr=3E?= To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 14:10:15 +0100 Message-ID: In-Reply-To: 20f43574-db1e-1a64-92b5-00a0dd557374@redhat.com --===============5832029283529377107== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Le 09/03/2017 =C3=A0 12:10, Juan Hern=C3=A1ndez a =C3=A9crit : > On 03/09/2017 11:57 AM, Gianluca Cecchi wrote: >> On Thu, Mar 9, 2017 at 11:39 AM, Nathana=C3=ABl Blanchet > > wrote: >> >> >> >> Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : >>> On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi >>> >= 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 ap=C3=A0plications like DB, so y= ou >> won't bypass vm pauses for such a stuff >> >> >> Yes, indeed, the important thing is to have an option so that you can >> set it True or False, depending on the VM you are saving, the >> application that is running isnide it and the way you want to do backup >> of the application. >> Nevertheless, RDBMS and also other applications often have some >> mechanism to be "frozen in a consistent state" so that you can save what >> you have on disk without need to save memory to have a consistent backup. >> Oracle for example has functionality to be put in "backup mode" where >> you issue "begin backup" before the snapshot and "end backup" right >> after snapshot completion. >> I see that POstgreSQL has similar functionality (not tested myself): >> https://www.postgresql.org/docs/9.4/static/continuous-archiving.html#BAC= KUP-LOWLEVEL-BASE-BACKUP >> and the same for other ones. >> >> Gianluca >> > Just wanted to add that freezing activity is not only important for > databases, but also for plain file systems. In order to do a consistent > backup it is important to freeze the file systems before creating a live > snapshot, and thaw it afterwards. oVirt does that automatically, but > only if the guest agent is installed and running. So, remember to have > the guest agent installed and running in the virtual machines that you > plan to backup using this mechanism. Very useful piece of information, so does that mean memory save feature = not to be really useful? if so, it shouldn't be the default, so that vm = never go into pause state unusefully. > -- = Nathana=C3=ABl Blanchet Supervision r=C3=A9seau P=C3=B4le Infrastrutures Informatiques 227 avenue Professeur-Jean-Louis-Viala 34193 MONTPELLIER CEDEX 5 = T=C3=A9l. 33 (0)4 67 54 84 55 Fax 33 (0)4 67 54 84 14 blanchet(a)abes.fr --===============5832029283529377107==-- From jhernand at redhat.com Thu Mar 9 13:44:05 2017 Content-Type: multipart/mixed; boundary="===============1690079059219755400==" MIME-Version: 1.0 From: =?utf-8?q?Juan_Hern=C3=A1ndez_=3Cjhernand_at_redhat=2Ecom=3E?= To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Thu, 09 Mar 2017 14:44:01 +0100 Message-ID: <0ea3e217-ed17-caa6-592f-e2086f0306f2@redhat.com> In-Reply-To: df6fca7e-3084-051f-6a99-35ad6584ee09@abes.fr --===============1690079059219755400== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On 03/09/2017 02:10 PM, Nathana=C3=ABl Blanchet wrote: > = > = > Le 09/03/2017 =C3=A0 12:10, Juan Hern=C3=A1ndez a =C3=A9crit : >> On 03/09/2017 11:57 AM, Gianluca Cecchi wrote: >>> On Thu, Mar 9, 2017 at 11:39 AM, Nathana=C3=ABl Blanchet >> > wrote: >>> >>> >>> >>> Le 09/03/2017 =C3=A0 10:25, Gianluca Cecchi a =C3=A9crit : >>>> On Wed, Mar 8, 2017 at 6:05 PM, Gianluca Cecchi >>>> > >>>> 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 ap=C3=A0plications like DB, so = you >>> won't bypass vm pauses for such a stuff >>> >>> >>> Yes, indeed, the important thing is to have an option so that you can >>> set it True or False, depending on the VM you are saving, the >>> application that is running isnide it and the way you want to do backup >>> of the application. >>> Nevertheless, RDBMS and also other applications often have some >>> mechanism to be "frozen in a consistent state" so that you can save what >>> you have on disk without need to save memory to have a consistent >>> backup. >>> Oracle for example has functionality to be put in "backup mode" where >>> you issue "begin backup" before the snapshot and "end backup" right >>> after snapshot completion. >>> I see that POstgreSQL has similar functionality (not tested myself): >>> https://www.postgresql.org/docs/9.4/static/continuous-archiving.html#BA= CKUP-LOWLEVEL-BASE-BACKUP >>> >>> and the same for other ones. >>> >>> Gianluca >>> >> Just wanted to add that freezing activity is not only important for >> databases, but also for plain file systems. In order to do a consistent >> backup it is important to freeze the file systems before creating a live >> snapshot, and thaw it afterwards. oVirt does that automatically, but >> only if the guest agent is installed and running. So, remember to have >> the guest agent installed and running in the virtual machines that you >> plan to backup using this mechanism. > Very useful piece of information, so does that mean memory save feature > not to be really useful? if so, it shouldn't be the default, so that vm > never go into pause state unusefully. I didn't mean that saving memory isn't useful. It is very useful, for certain use cases. For the backup use case I think it is better to disable it. --===============1690079059219755400==-- From gianluca.cecchi at gmail.com Fri Mar 10 12:52:36 2017 Content-Type: multipart/mixed; boundary="===============7968253869853126930==" MIME-Version: 1.0 From: Gianluca Cecchi To: users at ovirt.org Subject: Re: [ovirt-users] oVirt VM backup and restore Date: Fri, 10 Mar 2017 13:52:35 +0100 Message-ID: In-Reply-To: 9fd89a1d-4d96-4f8d-78a6-2562e96bfae6@redhat.com --===============7968253869853126930== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Thu, Mar 9, 2017 at 11:23 AM, Juan Hern=C3=A1ndez wrote: > > > Very good point Gialuca, you are right, the 'persist_memorystate' > flag > > is 'true' by default, and that makes the pause longer. Would you be > so > > kind to add it to the 'vm_backup.py' example that is part of version > 4 > > of the SDK? > > > > > > https://github.com/oVirt/ovirt-engine-sdk/blob/master/ > sdk/examples/vm_backup.py#L143-L151 > > sdk/examples/vm_backup.py#L143-L151> > > > > (Note that that Gibhub is just a mirror, the change needs to be > submited > > using gerrit.ovirt.org ). > > > > > > > > I already verified (on a 4.1 infra) that changing vm_backup.py > > downloaded yesterday from master this way (apart connection paramters): > > > > $ diff vm_backup.py vm_backup.py.orig > > 150d149 > > < persist_memorystate=3DFalse, > > > > I get the backup result and snapshot is correctly without memory saved > > (and no pause at VM side) > > > > [snip] > > I see that you already have a gerrit.ovirt.org, so it shouldn't be > difficult. The initial setup should be like this: > > $ git config --global user.name youruser > $ git config --global user.email your(a)email > $ git clone ssh://youruser(a)gerrit.ovirt.org:29418/ovirt-engine-sdk > $ gitdir=3D$(git rev-parse --git-dir); scp -p -P 29418 > youruser(a)gerrit.ovirt.org:hooks/commit-msg ${gitdir}/hooks/ > > Then, to submit the patch: > > $ cd ovirt-engine-sdk > $ Edit the vm_backup.py file, and make your changes. > $ git commit -a -s > $ git push origin HEAD:refs/for/master > > Ok. I found the time to try and apparently it worked as expected. The master (you? jenkins CI? ;-) should see my change... 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