Re: [ovirt-users] Ovirt backups lead to unresponsive VM

Are there any examples on using ovirt-imageio to backup a VM or where I could find details of RESTAPI for this functionality? I might attempt to write a python script for this purpose.

Thanx, Alex On Tue, Feb 13, 2018 at 8:59 PM, Alex K <rightkicktech(a)gmail.com&gt; wrote: > Thank you Nir for the below. > > I am putting some comments inline in blue. > > > On Tue, Feb 13, 2018 at 7:33 PM, Nir Soffer <nsoffer(a)redhat.com&gt; wrote: > >> On Wed, Jan 24, 2018 at 3:19 PM Alex K <rightkicktech(a)gmail.com&gt; wrote: >> >>> Hi all, >>> >>> I have a cluster with 3 nodes, using ovirt 4.1 in a self hosted setup >>> on top glusterfs. >>> On some VMs (especially one Windows server 2016 64bit with 500 GB of >>> disk). Guest agents are installed at VMs. i almost always observe that >>> during the backup of the VM the VM is rendered unresponsive (dashboard >>> shows a question mark at the VM status and VM does not respond to ping or >>> to anything). >>> >>> For scheduled backups I use: >>> >>> https://github.com/wefixit-AT/oVirtBackup >>> >>> The script does the following: >>> >>> 1. snapshot VM (this is done ok without any failure) >>> >> >> This is a very cheap operation >> >> >>> 2. Clone snapshot (this steps renders the VM unresponsive) >>> >> >> This copy 500g of data. In gluster case, it copies 1500g of data, since >> in glusterfs, the client >> is doing the replication. >> >> Maybe your network or gluster server is too slow? Can you describe the >> network topology? >> >> Please attach also the volume info for the gluster volume, maybe it is >> not configured in the >> best way? >> > > The network is 1Gbit. The hosts (3 hosts) are decent ones and new > hardware with each host having: 32GB RAM, 16 CPU cores and 2 TB of storage > in RAID10. > The VMS hosted (7 VMs) exhibit high performance. The VMs are Windows 2016 > and Windows10. > The network topology is: two networks defined at ovirt: ovirtmgmt is for > the managment and access network and "storage" is a separate network, where > each server is connected with two network cables at a managed switch with > mode 6 load balancing. this storage network is used for gluster traffic. > Attached the volume configuration. > >> 3. Export Clone >>> >> >> This copy 500g to the export domain. If the export domain is on >> glusterfs as well, you >> copy now another 1500g of data. >> >> > Export domain a Synology NAS with NFS share. If the cloning succeeds > then export is completed ok. > >> 4. Delete clone >>> >>> 5. Delete snapshot >>> >> >> Not clear why do you need to clone the vm before you export it, you can >> save half of >> the data copies. >> > Because I cannot export the VM while it is running. It does not provide > such option. > >> >> If you 4.2, you can backup the vm *while the vm is running* by: >> - Take a snapshot >> - Get the vm ovf from the engine api >> - Download the vm disks using ovirt-imageio and store the snaphosts in >> your backup >> storage >> - Delete a snapshot >> >> In this flow, you would copy 500g. >> >> I am not aware about this option. checking quickly at site this seems > that it is still half implemented? Is there any script that I may use and > test this? I am interested to have these backups scheduled. > > >> Daniel, please correct me if I'm wrong regarding doing this online. >> >> Regardless, a vm should not become non-responsive while cloning. Please >> file a bug >> for this and attach engine, vdsm, and glusterfs logs. >> >> > Nir >> >> Do you have any similar experience? Any suggestions to address this? >>> >>> I have never seen such issue with hosted Linux VMs. >>> >>> The cluster has enough storage to accommodate the clone. >>> >>> >>> Thanx, >>> >>> Alex >>> >>> >>> >>> _______________________________________________ >>> Users mailing list >>> Users(a)ovirt.org >>> http://lists.ovirt.org/mailman/listinfo/users >>> >> >