July 2015 - Users - oVirt List Archives

Is there a software-way to configure power management in oVirt?
by lofyer＠lofyer.org 07 Aug '15

07 Aug '15

Is there a software-way to configure power management in oVirt? Not all my clients have got IPMI.

2 1

VM Live Backup
by Prof. Dr. Michael Schefczyk 07 Aug '15

07 Aug '15

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

3 2

Testing Ovirt 3.6
by wodel youchi 06 Aug '15

06 Aug '15

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.

6 11

Data Center becomes Non Responsive when I reboot a host
by Konstantinos Christidis 04 Aug '15

04 Aug '15

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.

2 5

Poor guest write speeds
by Alan Murrell 04 Aug '15

04 Aug '15

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--

4 19

can't add Datastorge | 'Sanlock lockspace add failure', 'Message too long'
by Punit Dambiwal 04 Aug '15

04 Aug '15

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

2 9

Hanging Tasks
by Arsène Gschwind 02 Aug '15

02 Aug '15

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

4 7

virt-v2v
by Will K 31 Jul '15

31 Jul '15

------=_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--

5 6

CPU family: which should I choose?
by Alan Murrell 31 Jul '15

31 Jul '15

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

2 1

Storage network question
by Alan Murrell 31 Jul '15

31 Jul '15

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

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