VM Live Backup
by Prof. Dr. Michael Schefczyk
Dear All,
One feature that I am really missing in oVirt is a foolproof (i.e., in a way that even I will be able to implement) scheduled (cron would be good) live VM backup that outputs ideally qcow2 files per disk plus an xml-configuration file that one could upload to a regular KVM host, in case that should be required. As far as I understand, that is not yet on the roadmap, correct? For my plain SOHO KVM hosts, I am using a script to do just that. While I almost never need the backups - files with a human readable text name which I know how to use on any freshly installed KVM host in case of a crash emergency -, I feel better keeping them available for some time period.
Regards,
Michael
8 years, 8 months
Testing Ovirt 3.6
by wodel youchi
Hi,
I have installed ovirt 3.6 hosted-engine on Fedora22 for test.
using NFS4 as storage for the vm engine, vms, iso and export.
I am using ovirt-release-master repository
I have some problems
1 - the VM engine is not showing up on the webgui.
2 - I cannot start a VM after it's creation, I get an error about a failed
connection to DB, in the engine's error log I have an exception about a
none existant function 'gethostnetworksbycluster'.
3 - I couldn't import my old export domain
4 - I couldn't import my old vm domain.
thanks in advance.
8 years, 8 months
Data Center becomes Non Responsive when I reboot a host
by Konstantinos Christidis
Hello ovirt users,
I have 4 hosts with a distributed replicated 2x2 GlusterFS storage.
(oVirt3.5/CentOS7)
When I reboot a host (in maintenance mode and not my SPM host) my Data
Center becomes "Non Responsive", my storage becomes red and inactive,
and many VMs become "paused due to unknown storage error". The same
happens if I administratively set ovirtmgmt network down (to a host in
maintenance mode and not my SPM host) with ifconfig ovirtmgmt down.
I know that management network (ovirtmgmt) is required by default and is
part of oVirt monitoring process but is there anything I can do in order
to reboot a host without causing this mess?
Thanks,
K.
8 years, 8 months
Poor guest write speeds
by Alan Murrell
This is a multi-part message in MIME format.
--------------080005030803050104080801
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Hello,
I am running oVirt 3.5 on a single server (hosted engine). I have two
Western Digital WD20EZRX drives in a hardware RAID1 configuration. My
storage is actually on the single server, but I am attaching to it via NFS.
I created a Windows 7 guest, and I am finding its write speeds to be
horrible. It is a VirtIO-SCSI drive and the guest additions are installed.
The installation of the OS took way longer than bare metal or even
VMware. When I ran Windows updates, it again took a *lot* longer than
on bar metal or on VMware.
The read speeds seem to be fine. The guest is responsive when I click
on programs and they open about as fast as bare metal or VMware.
I downloaded and ran "Parkdale" HDD tester and ran a test with the
following settings:
- File size: 4000
- Block Size: 1 MByte
The results are as follows:
- Seq. Write Speed: 10.7 MByte/sec (Random Q32D: )
- Seq. Read Speed: 237.3 MByte/sec (Random Q32D: )
I ran another test, but this time changing the "Block Size" to "64 kByte
[Windows Default]". Results are as follows:
- Seq. Write Speed: 10.7 MByte/sec (Random Q32D: )
- Seq. Read Speed: 237.3 MByte/sec (Random Q32D: )
On the host, running '|dd bs=1M count=256 if=/dev/zero of=test
conv=fdatasync|' on my data mount via NFS rsuled in the following:
256+0 records in
256+0 records out
268435456 bytes (268 MB) copied, 3.59431 s, 74.7 MB/s
I got this <https://romanrm.net/dd-benchmark> and measures the write
speed of a disk. As you can see, it is significantly higher than what I
am getting in the Windows guest VM.
Running that same "dd" test on an Ubuntu guest VM gives me 24MB/s.
Any ideas why I have such poor write performance? Is this normal with
oVirt guests? Any ideas on what I might be able to do to improve them?
I don't expect to get close to the "bare metal" results, but maybe
something in the 40-60 MB/s range would be nice.
Thanks, in advance, for your help and advice.
-Alan
--------------080005030803050104080801
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: 8bit
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hello,<br>
<br>
I am running oVirt 3.5 on a single server (hosted engine). I have
two Western Digital WD20EZRX drives in a hardware RAID1
configuration. My storage is actually on the single server, but I
am attaching to it via NFS.<br>
<br>
I created a Windows 7 guest, and I am finding its write speeds to be
horrible. It is a VirtIO-SCSI drive and the guest additions are
installed.<br>
<br>
The installation of the OS took way longer than bare metal or even
VMware. When I ran Windows updates, it again took a *lot* longer
than on bar metal or on VMware.<br>
<br>
The read speeds seem to be fine. The guest is responsive when I
click on programs and they open about as fast as bare metal or
VMware.<br>
<br>
I downloaded and ran "Parkdale" HDD tester and ran a test with the
following settings:<br>
<br>
- File size: 4000<br>
- Block Size: 1 MByte<br>
<br>
The results are as follows:<br>
<br>
- Seq. Write Speed: 10.7 MByte/sec (Random Q32D: )<br>
- Seq. Read Speed: 237.3 MByte/sec (Random Q32D: )<br>
<br>
I ran another test, but this time changing the "Block Size" to "64
kByte [Windows Default]". Results are as follows:<br>
<br>
- Seq. Write Speed: 10.7 MByte/sec (Random Q32D: )<br>
- Seq. Read Speed: 237.3 MByte/sec (Random Q32D: )<br>
<br>
On the host, running '<code>dd bs=1M count=256 if=/dev/zero of=test
conv=fdatasync</code>' on my data mount via NFS rsuled in the
following:<br>
<br>
256+0 records in<br>
256+0 records out<br>
268435456 bytes (268 MB) copied, 3.59431 s, 74.7 MB/s<br>
<br>
I got this <a class="moz-txt-link-rfc2396E" href="https://romanrm.net/dd-benchmark"><https://romanrm.net/dd-benchmark></a> and measures the
write speed of a disk. As you can see, it is significantly higher
than what I am getting in the Windows guest VM.<br>
<br>
Running that same "dd" test on an Ubuntu guest VM gives me 24MB/s.<br>
<br>
Any ideas why I have such poor write performance? Is this normal
with oVirt guests? Any ideas on what I might be able to do to
improve them? I don't expect to get close to the "bare metal"
results, but maybe something in the 40-60 MB/s range would be nice.<br>
<br>
Thanks, in advance, for your help and advice.<br>
<br>
-Alan<br>
<br>
</body>
</html>
--------------080005030803050104080801--
8 years, 8 months
can't add Datastorge | 'Sanlock lockspace add failure', 'Message too long'
by Punit Dambiwal
Hi,
I have one testing ovirt cluster with one glusterfs storage (Distributed
replicated) and 3 HV nodes...it's all working fine...but when i try to add
another glusterfs datastorage (replicateX3),i am not able to add the
datastore to ovirt and it failed with the following error :-
2015-07-29 10:05:55,194 ERROR
[org.ovirt.engine.core.vdsbroker.irsbroker.IrsBrokerCommand]
(org.ovirt.thread.pool-8-thread-32) [751c5f25]
IrsBroker::Failed::AttachStorageDomainVDS due to: IRSErrorException:
IRSGenericException: IRSErrorException: Failed to AttachStorageDomainVDS,
error = Cannot acquire host id: (u'd0e76dd4-c34a-456e-b7f6-02dc173a3cc1',
SanlockException(90, 'Sanlock lockspace add failure', 'Message too long')),
code = 661
Engine logs :- http://paste.ubuntu.com/11957076/
Screen shots attached...
Thanks,
Punit
8 years, 8 months
Hanging Tasks
by Arsène Gschwind
Hi,
I've searched around but couldn't find a solution.
Is there a way to kill/remove hanging tasks in the oVirt admin portal?
Thanks for any hint.
rgds,
Arsène
8 years, 8 months
virt-v2v
by Will K
------=_Part_2132314_2007715988.1438293466794
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Hi=20
I have a project to convert VMs on VMware ESX 5.5 and some VM on standalone=
KVM server to oVirt.=C2=A0 I started to look into virt-v2v.=C2=A0 I wonder=
if I'm hitting the right list.=C2=A0 Please let me know if this list doesn=
't cover virt-v2v.
Issue:when I run the following command on one of two hosts running oVirt 3.=
3.3-2-el6
=C2=A0=C2=A0=C2=A0 virt-v2v=C2=A0 -ic esx://esxserver1/?no_verify=3D1 -os G=
FS1 virtmachine1
I got:virt-v2v: Failed to connect to qemu:///system: libvirt error code: 45=
, message: authentication failed: Failed to step SASL negotiation: -7 (SASL=
(-7): invalid parameter supplied: Unexpectedly missing a prompt result)
I already added a .netrc which 600, correct oVirt login and password. I als=
o ran saslpasswd2 as root already.
Thanks
Will
------=_Part_2132314_2007715988.1438293466794
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:16px"><div id=3D"yui_3_16_0_1_1438289155822_26948">Hi <br></div><di=
v id=3D"yui_3_16_0_1_1438289155822_27061"><br></div><div id=3D"yui_3_16_0_1=
_1438289155822_27060" dir=3D"ltr">I have a project to convert VMs on VMware=
ESX 5.5 and some VM on standalone KVM server to oVirt. I started to =
look into virt-v2v. I wonder if I'm hitting the right list. Ple=
ase let me know if this list doesn't cover virt-v2v.</div><div id=3D"yui_3_=
16_0_1_1438289155822_26998" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_1=
438289155822_27002" dir=3D"ltr">Issue:</div><div id=3D"yui_3_16_0_1_1438289=
155822_27059" dir=3D"ltr">when I run the following command on one of two ho=
sts running oVirt 3.3.3-2-el6<br></div><div id=3D"yui_3_16_0_1_143828915582=
2_26997" dir=3D"ltr"> virt-v2v -ic esx://esxserver1=
/?no_verify=3D1 -os GFS1 virtmachine1</div><div id=3D"yui_3_16_0_1_14382891=
55822_27090" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_1438289155822_27=
058" dir=3D"ltr">I got:</div><div id=3D"yui_3_16_0_1_1438289155822_27052" d=
ir=3D"ltr">virt-v2v: Failed to connect to qemu:///system: libvirt error cod=
e: 45, message: authentication failed: Failed to step SASL negotiation: -7 =
(SASL(-7): invalid parameter supplied: Unexpectedly missing a prompt result=
)</div><div id=3D"yui_3_16_0_1_1438289155822_27092" dir=3D"ltr"><br></div><=
div id=3D"yui_3_16_0_1_1438289155822_27091" dir=3D"ltr">I already added a .=
netrc which 600, correct oVirt login and password. I also ran saslpasswd2 a=
s root already.</div><div id=3D"yui_3_16_0_1_1438289155822_27131" dir=3D"lt=
r"><br></div><div id=3D"yui_3_16_0_1_1438289155822_27130" dir=3D"ltr">Thank=
s</div><div id=3D"yui_3_16_0_1_1438289155822_27132" dir=3D"ltr"><br></div><=
div dir=3D"ltr">Will<br></div><div id=3D"yui_3_16_0_1_1438289155822_27051" =
dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_1438289155822_26888"><br></di=
v></div></body></html>
------=_Part_2132314_2007715988.1438293466794--
8 years, 9 months
CPU family: which should I choose?
by Alan Murrell
Hello,
I am a bit confused about the CPU families. When I installed my host,
it prompted me for the CPU family to use, and gave me a list of CPU
models to choose from. I chose the default suggestion, model_SandyBridge.
I don't recall all the choices it gave me offhand, but when I run '
vdsClient -s 0 getVdsCaps | grep -i flags ; echo -e -n "\n" ;cat
/proc/cpuinfo | grep "model name" | head -n 1', it indicates the
following models detected:
model_Nehalem
model_Conroe
model_coreduo
model_core2duo
model_Penryn
model_Westmere
model_n270
model_SandyBridge
Which one would provide the most compatibility? Is there a list of CPU
family "hierarchies" which would indicate what model(s) could fit with what?
Thanks! :-)
-Alan
8 years, 9 months
Storage network question
by Alan Murrell
If I am using a NIC on my host on the storage network to access storage
(NFS, iSCSI, Gluster, etc.), is there any issue with allowing VMs to be
assigned to it so they can access the same storage network?
(the VMs would have a NIC added specifically for this, of course)
Basically, unlike in VMware and Hyper-V, in oVirt can the same NIC be
used for host and VM access to the storage network?
Thanks! :-)
-Alan
8 years, 9 months
