Re: [ovirt-users] Live VM Backups
Thanks, Soeren. I'll give it a look. On 07/08/2015 03:36 PM, Soeren Malchow wrote: Dear Chris, It is not true, you can snapshot a machine, then clone the snapshot and export it for backup purposes after that you can remove the snapshot, all on the live VM. However, you need newer versions of libvirt to do that, right now we are using CentOS 7.1 and the libvirt that comes with it is capable of doing live merge which is necessary to achieve this. But i have to warn you, we are experiencing a problem when removing the snapshots (the part is commented in the attached script) it sometimes kills virtual machines in a way that makes it necessary to put the hypervisor to maintenance and then restart vdsmd and libvirtd before you can start that VM again. There is a bug filed already and it is in progress https://bugzilla.redhat.com/show_bug.cgi?id=1231754 I also have to add that i newer version of libvirt (on Fedora 20 with the libvirt preview repo) did not have that problem, so i am confident that this will be solved soon. Last but not least there is a plan to be able to export snapshots right away for backup without having to clone them first, this is a huge step forward for the backup procedure in terms of time that is needed and the load on the storage and hypervisor systems. I would really appreciate if you would help improving that script (we are not python developers), i will see that i make this a github project or something like that Cheers Soeren ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
[ovirt-users] Live VM Backups
From what I can tell, you can only backup a VM to an export domain if the VM is shut down. Is a live VM backup not possible through oVirt? If not, why not? Most other virtualization tools can handle this. If it is possible, how do I do it through the backup API? api.vms.myvm.export requires it to be shutdown so what would the alternative be? Thanks. -- This email was Virus checked by UTM 9. For issues please contact the Windows Systems Admin. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Re: [ovirt-users] Live VM Backups
Dear Chris, It is not true, you can snapshot a machine, then clone the snapshot and export it for backup purposes after that you can remove the snapshot, all on the live VM. However, you need newer versions of libvirt to do that, right now we are using CentOS 7.1 and the libvirt that comes with it is capable of doing live merge which is necessary to achieve this. But i have to warn you, we are experiencing a problem when removing the snapshots (the part is commented in the attached script) it sometimes kills virtual machines in a way that makes it necessary to put the hypervisor to maintenance and then restart vdsmd and libvirtd before you can start that VM again. There is a bug filed already and it is in progress https://bugzilla.redhat.com/show_bug.cgi?id=1231754 I also have to add that i newer version of libvirt (on Fedora 20 with the libvirt preview repo) did not have that problem, so i am confident that this will be solved soon. Last but not least there is a plan to be able to export snapshots right away for backup without having to clone them first, this is a huge step forward for the backup procedure in terms of time that is needed and the load on the storage and hypervisor systems. I would really appreciate if you would help improving that script (we are not python developers), i will see that i make this a github project or something like that Cheers Soeren On 08/07/15 17:13, users-boun...@ovirt.org on behalf of Chris Jones - BookIt.com Systems Administrator users-boun...@ovirt.org on behalf of chris.jo...@bookit.com wrote: From what I can tell, you can only backup a VM to an export domain if the VM is shut down. Is a live VM backup not possible through oVirt? If not, why not? Most other virtualization tools can handle this. If it is possible, how do I do it through the backup API? api.vms.myvm.export requires it to be shutdown so what would the alternative be? Thanks. -- This email was Virus checked by UTM 9. For issues please contact the Windows Systems Admin. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users #!/usr/bin/python import Queue import threading import time from ovirtsdk.api import API from ovirtsdk.xml import params import sys import datetime import smtplib from email.mime.text import MIMEText global SNAPSHOT_NAME VERSION = params.Version(major='3', minor='0') ENGINE_SERVER = '' ENGINE_USER = '' ENGINE_PASSWORD = '' ENGINE_CERT = '' NOW = datetime.datetime.now() SNAPSHOT_NAME = 'BACKUP_' + NOW.strftime(%Y-%m-%d-%H%M) DAY_OF_WEEK = NOW.strftime(%w) BACKUP = FULL exitFlag = 0 class myThread (threading.Thread): def __init__(self, threadID, name, q): threading.Thread.__init__(self) self.threadID = threadID self.name = name self.q = q self.api = api global message def run(self): print Starting + self.name process_data(self.name, self.q) print Exiting + self.name def process_data(threadName, q): while not exitFlag: queueLock.acquire() if not workQueue.empty(): data = q.get() queueLock.release() print %s processing %s % (threadName, data.name) vm = api.vms.get(name=data.name) vmname = data.name +_ newvmname = vmname + SNAPSHOT_NAME cluster = api.clusters.get(id=vm.cluster.id) dc = api.datacenters.get(id=cluster.data_center.id) export = None for sd in dc.storagedomains.list(): if sd.type_ == export: export = sd if not export: print(Export domain required, and none found, exitting...\n) sys.exit(1) if (data.name != 'HostedEngine' and cluster.name == 'CC-01'): vm.snapshots.add(params.Snapshot(description=SNAPSHOT_NAME, vm=vm )) snap = vm.snapshots.list(description=SNAPSHOT_NAME)[0] while vm.snapshots.get(id=snap.id).snapshot_status == locked: print(%s Waiting for snapshot of %s to finish) % (threadName, vm.name) time.sleep(60) print(%s Snapshotting %s is done) % (threadName,vm.name) try: snapshots = params.Snapshots(snapshot=[params.Snapshot(id=snap.id)]) api.vms.add(params.VM(name=newvmname, snapshots=snapshots, cluster=cluster, template=api.templates.get(name=Blank))) while api.vms.get(name=newvmname).status.state == image_locked: print(%s Waiting for clone of %s to finish) % (threadName, vm.name) time.sleep(300) print(%s Cloning of %s done) % (threadName, vm.name)
Re: [ovirt-users] Live VM Backups
Hi Soeren, thanks for sharing! I will look on this script right after upgrading to 7.1. It looks really useful. cheers, Jiri On 07/08/2015 09:36 PM, Soeren Malchow wrote: Dear Chris, It is not true, you can snapshot a machine, then clone the snapshot and export it for backup purposes after that you can remove the snapshot, all on the live VM. However, you need newer versions of libvirt to do that, right now we are using CentOS 7.1 and the libvirt that comes with it is capable of doing live merge which is necessary to achieve this. But i have to warn you, we are experiencing a problem when removing the snapshots (the part is commented in the attached script) it sometimes kills virtual machines in a way that makes it necessary to put the hypervisor to maintenance and then restart vdsmd and libvirtd before you can start that VM again. There is a bug filed already and it is in progress https://bugzilla.redhat.com/show_bug.cgi?id=1231754 I also have to add that i newer version of libvirt (on Fedora 20 with the libvirt preview repo) did not have that problem, so i am confident that this will be solved soon. Last but not least there is a plan to be able to export snapshots right away for backup without having to clone them first, this is a huge step forward for the backup procedure in terms of time that is needed and the load on the storage and hypervisor systems. I would really appreciate if you would help improving that script (we are not python developers), i will see that i make this a github project or something like that Cheers Soeren On 08/07/15 17:13, users-boun...@ovirt.org on behalf of Chris Jones - BookIt.com Systems Administrator users-boun...@ovirt.org on behalf of chris.jo...@bookit.com wrote: From what I can tell, you can only backup a VM to an export domain if the VM is shut down. Is a live VM backup not possible through oVirt? If not, why not? Most other virtualization tools can handle this. If it is possible, how do I do it through the backup API? api.vms.myvm.export requires it to be shutdown so what would the alternative be? Thanks. -- This email was Virus checked by UTM 9. For issues please contact the Windows Systems Admin. ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users smime.p7s Description: S/MIME Cryptographic Signature ___ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
