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Latency threshold between Hosted Engine and Hosts
by FERNANDO FREDIANI 18 Apr '17

18 Apr '17

This is a multi-part message in MIME format. --------------D0FF4C4FF8B95B82C3141A34 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hello. I have a Engine which is hosted in a optimal location for the people who access it and this Engine manage multiple Datacenters, some close by and some far away in terms of latency. What is the maximum latency advised between the Engine and the hosts for a healthy operation or that doesn't matter much as long the Engine can always reach the hosts ? Currently the maximum latency I have between Engine and Hosts is 110ms and sometimes when there is a non-optimal route latency goes up to 170ms. Should I be concerned about this ? Thanks Fernando --------------D0FF4C4FF8B95B82C3141A34 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body bgcolor="#FFFFFF" text="#000000"> <font face="arial, helvetica, sans-serif">Hello.<br> <br> I have a Engine which is hosted in a optimal location for the people who access it and this Engine manage multiple Datacenters, some close by and some far away in terms of latency. <br> <br> What is the maximum latency advised between the Engine and the hosts for a healthy operation or that doesn't matter much as long the Engine can always reach the hosts ?<br> <br> Currently the maximum latency I have between Engine and Hosts is 110ms and sometimes when there is a non-optimal route latency goes up to 170ms. Should I be concerned about this ?<br> <br> Thanks<br> Fernando<br> <br> </font> </body> </html> --------------D0FF4C4FF8B95B82C3141A34--

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How do you oVirt? Here the answers!
by Sandro Bonazzola 17 Apr '17

17 Apr '17

Hi, a few weeks ago I opened a survey asking oVirt users about how they use oVirt. Here are the analytics of the survey: https://docs.google.com/forms/d/1s3k4pq_U4vHTuUUKr6dOosGj_EGFxqEisansHlqnyy… Most notable facts: - 197 responses, two times the responses we got with the 3.6 survey! - CentOS confims as the most used distribution for running oVirt engine (89.8%) and Hypervisors (74.3% which become 94.2% including oVirt Node which is a CentOS spin) - Fedora is the second distribution (4.6%) mostly used only for runnig oVirt engine - oVirt Node jumped from 7.1% on 3.6 survey to 19.9% in 4.1! - Surprisingly we have someone running both engine and hypervisor on Ubuntu based system, within VMs. I'd like to hear more about this use case. - Within other OS we had Red Hat Enterprise Linux 6 and 7 and Scientific Linux (I guess 7, wasn't specified) - Within the storage, there isn't a "winner" between NFS, Gluster and iSCSI. Within Other Storage, Fiber Channel is the most used. We had also: Ceph, DAS, EMC ScaleIO, GPFS - Hosted Engine is the most used deployment choice with 58.4% (was 50.0% in 3.6) - 65.8% of Hosted Engine users use it in Hyperconverged setup. Thank you for your feedback and appreciation, we'll look into suggestions you sent in the survey. -- SANDRO BONAZZOLA ASSOCIATE MANAGER, SOFTWARE ENGINEERING, EMEA ENG VIRTUALIZATION R&D Red Hat EMEA <https://www.redhat.com/> <https://red.ht/sig> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>

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JUST CANT UNDERSTAND WHY OVIRT DOESNT HAVE A WEB-GUI FOR EDITING , REMOVING UNWANTED STORAGE DOMAINS
by martin chamambo 17 Apr '17

17 Apr '17

JUST CANT UNDERSTAND WHY OVIRT DOESNT HAVE A WEB-GUI FOR EDITING ,REMOVING UNWANTED STORAGE DOMAINS I configured openfiler as my iscsi storage and while i am able to connect to it ....i wanted to change the IP address of the connecting IP to one of the logical networks which i disignated as a STORAGE role. This is a nightmare changing this and i have to set hosts in maintenence mode and delete the datacenter , is there any other way ?

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Memory ballooning not working on RHEV 4.1?
by Joseph Chapman 16 Apr '17

16 Apr '17

Hello all, I have a RHEV 4.1 host running Windows 10 VMs. I have installed the balloon driver on the VMs (RHEV guest tools), and enabled memory ballooning on the cluster using RHEV-M. On the VMs, I have set the system memory to Memory Size: 4GB, Maximum Memory: 16GB. While I can manually hot plug memory, I am not seeing additional memory being automatically allocated to the VMs during a SQL workload. The documentation for RHEV 4.1 is not clear on whether or not this automatic ballooning is functional (earlier documentation suggests that it is functional only by use of an API). I am new to RHEV and would appreciate some help troubleshooting this. Please let me know if there's any additional information I should provide. I messaged this mailing list on suggestion from someone in the IRC. I hope this is in-bounds. Thanks for your time! -- Joseph Chapman http://fjchapman.tumblr.com +1 828 777 0751

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virsh list
by Konstantin Raskoshnyi 14 Apr '17

14 Apr '17

Hi guys I'm trying to run virsh list (or any other virsh commands) virsh list Please enter your authentication name: admin Please enter your password: error: failed to connect to the hypervisor error: authentication failed: authentication failed But I have no clue about login:password ovirt uses. I tried admin password, also tried to create new account with saslpasswd2 Which didn't work to. Any solutions?

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Networking setup
by Alexis HAUSER 14 Apr '17

14 Apr '17

------=_Part_6006787_1898687053.1491982178695 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Hi, I have an Ovirt installation with 3 nodes (5 soon), containing 6 network cards (8 soon), a multipath iSCSI array and I would like to know how you would advice me to choose which link to bond or not. I thought about : 1+2 : ovirtmgmt (bond) 3+4 : iSCSI (multipath) 5 : VM and Display 6 : Migration What do you think about this configuration ? Is it a bad idea to set VM and display on the same network interface ? Do ovirtmgmt need high bandwidth ? In terms of bandwidth, is it a bad idea to have one single NIC for Migration ? Thanks in advance for your suggestions ------=_Part_6006787_1898687053.1491982178695 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><body><div style=3D"font-family: times new roman, new york, times, se= rif; font-size: 12pt; color: #000000"><div>Hi,<br></div><div><br></div><div= ><br></div><div>I have an Ovirt installation with 3 nodes (5 soon), contain= ing 6 network cards (8 soon), a multipath iSCSI array and I would like to k= now how you would advice me to choose which link to bond or not.<br></div><= div><br></div><div>I thought about : <br></div><div><br></div><div>1+2 : ov= irtmgmt (bond)<br></div><div>3+4 : iSCSI (multipath)<br></div><div>5 : VM a= nd Display<br></div><div>6 : Migration<br></div><div><br></div><div>What do= you think about this configuration ? <br></div><div>Is it a bad idea to se= t VM and display on the same network interface ?<br></div><div>Do ovirtmgmt= need high bandwidth ?<br></div><div>In terms of bandwidth, is it a bad ide= a to have one single NIC for Migration ?<br></div><div><br></div><div><br><= /div><div>Thanks in advance for your suggestions<br></div></div></body></ht= ml> ------=_Part_6006787_1898687053.1491982178695--

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After adding ISCSI storage on ovirt 4.0 (both engine and node) , storage doesnt come up
by martin chamambo 14 Apr '17

14 Apr '17

For some reason when i add iscsi storage on my ovirtNode it works like a charm , but when i reboot the ovirtengine and node , the storage doesnt come up and on the storage tab , i have noticed that the USE HOST dropdown is empty NB:iscsi and iscsid are running on the node and the LUN is active

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cleanup old recovery backup
by eric stam 14 Apr '17

14 Apr '17

Good morning, Just a question. When I do an upgrade of a hosted-engine by the "hosted-engine --upgarde-appliance" command the procedure will automatically make a backup for recovery. Is there a way to remove an old backup, without finding out yourself which files user used and which not (and hooping you will not remove a wrong one). -- Gr. Eric Stam *Mob*.: 06-50278119

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spice folder sharing
by Nathanaël Blanchet 13 Apr '17

13 Apr '17

Hi all, Is there a native way to enable spice sharing like described there: https://www.spice-space.org/docs/manual/manual.chunked/ar01s10.html I guess such a hook is very simple to write. -- Nathanaël Blanchet Supervision réseau Pôle Infrastrutures Informatiques 227 avenue Professeur-Jean-Louis-Viala 34193 MONTPELLIER CEDEX 5 Tél. 33 (0)4 67 54 84 55 Fax 33 (0)4 67 54 84 14 blanchet(a)abes.fr

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Hosted engine setup shooting dirty pool
by Jamie Lawrence 13 Apr '17

13 Apr '17

Or at least, refusing to mount a dirty pool. I have 4.1 set up, configured and functional, currently wired up with two VM hosts and three Gluster hosts. It is configured with a (temporary) NFS data storage domain, with the end-goal being two data domains on Gluster; one for the hosted engine, one for other VMs. The issue is that `hosted-engine` sees any gluster volumes offered as dirty. (I have been creating them via the command line right before attempting the hosted-engine migration; there is nothing in them at that stage.) I *think* what is happening is that ovirt-engine notices a newly created volume and has its way with the volume (visible in the GUI; the volume appears in the list), and the hosted-engine installer becomes upset about that. What I don’t know is what to do about it. Relevant log lines below. The installer almost sounds like it is asking me to remove the UUID-directory and whatnot, but I’m pretty sure that’s just going to leave me with two problems instead of fixing the first one. I’ve considered attempting to wire this together in the DB, which also seems like a great way to break things. I’ve even thought of using a Gluster installation that Ovirt knows nothing about, mainly as an experiment to see if it would even work, but decided it doesn’t matter, because I can’t deploy in that state anyway and it doesn’t actually get me any closer to getting this working. I noticed several bugs in the tracker seemingly related, but the bulk of those were for past versions and I saw nothing that seemed actionable from my end in the others. So, can anyone spare a clue as to what is going wrong, and what to do about that? -j - - - - ovirt-hosted-engine-setup.log - - - - 2017-04-11 16:14:39 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._storageServerConnection:408 connectStorageServer 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._storageServerConnection:475 {'status': {'message': 'Done', 'code': 0}, 'items': [{u'status': 0, u'id': u'890e82cf-5570-4507-a9bc-c610584dea6e'}]} 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._storageServerConnection:502 {'status': {'message': 'Done', 'code': 0}, 'items': [{u'status': 0, u'id': u'cd1a1bb6-e607-4e35-b815-1fd88b84fe14'}]} 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._check_existing_pools:794 _check_existing_pools 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._check_existing_pools:795 getConnectedStoragePoolsList 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._check_existing_pools:797 {'status': {'message': 'Done', 'code': 0}} 2017-04-11 16:14:40 INFO otopi.plugins.gr_he_setup.storage.storage storage._misc:956 Creating Storage Domain 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStorageDomain:513 createStorageDomain 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStorageDomain:547 {'status': {'message': 'Done', 'code': 0}} 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStorageDomain:549 {'status': {'message': 'Done', 'code': 0}, u'mdasize': 0, u'mdathreshold': True, u'mdavalid': True, u'diskfree': u'321929216000', u'disktotal': u'321965260800', u'mdafree': 0} 2017-04-11 16:14:40 INFO otopi.plugins.gr_he_setup.storage.storage storage._misc:959 Creating Storage Pool 2017-04-11 16:14:40 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createFakeStorageDomain:553 createFakeStorageDomain 2017-04-11 16:14:41 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createFakeStorageDomain:570 {'status': {'message': 'Done', 'code': 0}} 2017-04-11 16:14:41 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createFakeStorageDomain:572 {'status': {'message': 'Done', 'code': 0}, u'mdasize': 0, u'mdathreshold': True, u'mdavalid': True, u'diskfree': u'1933930496', u'disktotal': u'2046640128', u'mdafree': 0} 2017-04-11 16:14:41 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStoragePool:587 createStoragePool 2017-04-11 16:14:41 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStoragePool:627 createStoragePool(args=[storagepoolID=9e399f0c-7c4b-4131-be79-922dda038383, name=hosted_datacenter, masterSdUUID=9a5c302b-2a18-4c7e-b75d-29088299988c, masterVersion=1, domainList=['9a5c302b-2a18-4c7e-b75d-29088299988c', 'f26efe61-a2e1-4a85-a212-269d0a047e07'], lockRenewalIntervalSec=None, leaseTimeSec=None, ioOpTimeoutSec=None, leaseRetries=None]) 2017-04-11 16:15:29 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._createStoragePool:640 {'status': {'message': 'Done', 'code': 0}} 2017-04-11 16:15:29 INFO otopi.plugins.gr_he_setup.storage.storage storage._misc:962 Connecting Storage Pool 2017-04-11 16:15:29 DEBUG otopi.plugins.gr_he_setup.storage.storage storage._storagePoolConnection:717 connectStoragePool 2017-04-11 16:15:29 DEBUG otopi.context context._executeMethod:142 method exception Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/otopi/context.py", line 132, in _executeMethod method['method']() File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/gr-he-setup/storage/storage.py", line 963, in _misc self._storagePoolConnection() File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/gr-he-setup/storage/storage.py", line 725, in _storagePoolConnection message=status['status']['message'], RuntimeError: Dirty Storage Domain: Cannot connect pool, already connected to another pool: ('ef5e4496-3095-40a8-89da-6847db67a4b9',) Please clean the storage device and try again 2017-04-11 16:15:29 ERROR otopi.context context._executeMethod:151 Failed to execute stage 'Misc configuration': Dirty Storage Domain: Cannot connect pool, already connected to another pool: ('ef5e4496-3095-40a8-89da-6847db67a4b9',) Please clean the storage device and try again 2017-04-11 16:15:29 DEBUG otopi.transaction transaction.abort:119 aborting 'Yum Transaction' 2017-04-11 16:15:29 INFO otopi.plugins.otopi.packagers.yumpackager yumpackager.info:80 Yum Performing yum transaction rollback Loaded plugins: fastestmirror 2017-04-11 16:15:29 DEBUG otopi.transaction transaction.abort:119 aborting 'File transaction for '/etc/ovirt-hosted-engine/firewalld/hosted-console.xml'' 2017-04-11 16:15:29 DEBUG otopi.transaction transaction.abort:119 aborting 'File transaction for '/etc/ovirt-hosted-engine/firewalld/hosted-cockpit.xml'' 2017-04-11 16:15:29 DEBUG otopi.transaction transaction.abort:119 aborting 'File transaction for '/etc/ovirt-hosted-engine/iptables.example'' 2017-04-11 16:15:29 DEBUG otopi.context context.dumpEnvironment:760 ENVIRONMENT DUMP - BEGIN

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