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Tuning and testing GlusterFS performance
by Jayme 07 Aug '18

07 Aug '18

So I've finally completed my first HCI build using the below configuration: 3x Dell PowerEdge R720 2x 2.9 GHz 8 Core E5-2690 256GB RAM 2x250gb SSD Raid 1 (boot/os) 2x2TB SSD jbod passthrough (used for gluster bricks) 1Gbe Nic for management 10Gbe nic for Gluster Using Replica 3 with no arbiter. Installed the latest version of oVirt available at the time 4.2.5. Created recommended volumes (with an additional data volume on second SSD). Not using VDO First thing I did was setup glusterFS network on 10Gbe and set it to be used for glusterFS and migration traffic. I've setup a single test VM using Centos7 minimal on the default "x-large instance" profile. Within this VM if I do very basic write test using something like: dd bs=1M count=256 if=/dev/zero of=test conv=fdatasync I'm seeing quite slow speeds, only 8mb/sec. If I do the same from one of the hosts gluster mounts i.e. host1: /rhev/data-center/mnt/glusterSD/HOST:data I get about 30mb/sec (which still seems fairly low?) Am I testing incorrectly here? Is there anything I should be tuning on the Gluster volumes to increase performance with SSDs? Where can I find out where the bottle neck is here, or is this expected performance of Gluster?

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Unable to login to the WEB UI Unexpected character ('<' (code 60))....
by sylvain.palous＠gmail.com 06 Aug '18

06 Aug '18

Hi, I installed oVirt on my local server, and trying to login to the web UI from another computer on the same local network. No DNS server. Unfortunaly i'm getting this error : Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null') at [Source: java.io.StringReader@29cf6878; line: 1, column: 2] In ovirt-provider-ovn.log, i get this error : File "/usr/share/ovirt-provider-ovn/auth/plugins/ovirt/sso.py", line 47, in wrapper raise BadGateway(e) BadGateway: ('Connection aborted.', gaierror(-2, 'Name or service not known')) In ovirt-engine.log : 2018-08-05 16:49:33,594+02 ERROR [org.ovirt.engine.core.bll.provider.network.SyncNetworkProviderCommand] (EE-ManagedThreadFactory-engineScheduled-Thread-83) [40e9406d] Command 'org.ovirt.engine.core.bll.provider.network.SyncNetworkProviderCommand' failed: EngineException: (Failed with error Bad Gateway and code 5050) 2018-08-05 16:49:33,645+02 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedThreadFactory-engineScheduled-Thread-83) [40e9406d] EVENT_ID: PROVIDER_SYNCHRONIZED_FAILED(216), Failed to synchronize networks of Provider ovirt-provider-ovn. Boot.log looks ok Trying to understand this fix : https://bugzilla.redhat.com/show_bug.cgi?id=1336838 1. Which certificates i have to install ? 2. Configure HTTPS certificate in Apache : How ? Thanks for your help. Halsk

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disk_vm_element ERROR: duplicate key value violates unique constraint "pk_disk_vm_element"
by Punaatua PK 05 Aug '18

05 Aug '18

Hello, when i tried to attach a snapshot disk into my backupvm. oVirt doesn't want to attach it. In the engine.log I can see this. 2018-08-04 19:20:04,472-10 ERROR [org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand] (default task-33) [646ad7a1-4501-4648-a937-bbee0abaec46] Command 'org.ovirt.engine.core.bll.storage.disk.AttachDiskToVmCommand' failed: CallableStatementCallback; SQL [{call insertdiskvmelement(?, ?, ?, ?, ?, ?)}]; ERROR: duplicate key value violates unique constraint "pk_disk_vm_element" Detail: Key (vm_id, disk_id)=(78ef239f-3cb3-4eef-921f-f989724009ef, c7cef731-e31d-4597-80f1-1f2393cd66ea) already exists. Where: SQL statement "INSERT INTO disk_vm_element ( disk_id, vm_id, is_boot, pass_discard, disk_interface, is_using_scsi_reservation) VALUES ( v_disk_id, v_vm_id, v_is_boot, v_pass_discard, v_disk_interface, v_is_using_scsi_reservation)" PL/pgSQL function insertdiskvmelement(uuid,uuid,boolean,boolean,character varying,boolean) line 3 at SQL statement; nested exception is org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "pk_disk_vm_element" Detail: Key (vm_id, disk_id)=(78ef239f-3cb3-4eef-921f-f989724009ef, c7cef731-e31d-4597-80f1-1f2393cd66ea) already exists. When i SQL the database, the entries is present (and many other). But in the webinterface, I can't see them on the backupVM. It's just like ovirt didn't delete old entries engine=# select * from disk_vm_element where vm_id = '78ef239f-3cb3-4eef-921f-f989724009ef' and disk_id = 'c7cef731-e31d-4597-80f1-1f2393cd66ea' ; disk_id | vm_id | is_boot | disk_interface | is_using_scsi_reservation | pass_discard --------------------------------------+--------------------------------------+---------+----------------+---------------------------+-------------- c7cef731-e31d-4597-80f1-1f2393cd66ea | 78ef239f-3cb3-4eef-921f-f989724009ef | f | VirtIO | f | f (1 row) Do you guys have any idea on how to correct this ? Is there any function to update / refresh this table ? I dont want to delete entries by sql as i don't know the consequences, is it safe to delete entries ? Thank you for your help

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Re: VirtIO in new upgraded 4.2.5 for FreeBSD is very poor (could not use)
by Karli Sjöberg 05 Aug '18

05 Aug '18

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Installation Help
by bilal.ahmed＠kfueit.edu.pk 05 Aug '18

05 Aug '18

Dear Sir I have successfully installed the ovirt engine and ovirt node separately on two machines and I have accessed their web portals as well . But I am facing a problem in its initial configuration that I am unable to add a host and its installation fails . I am using default data center and default cluster . Could you please guide what can be the issue , credentials are correct . I have tried to add both the ovirt engine and ovirt node as a host but failed. Bilal Ahmad Network Administrator Cell: +92 333 7451870 | Tel: +92 68 5882400 | Ext. 2499 www.kfueit.edu.pk <http://www.kfueit.edu.pk> <http://www.kfueit.edu.pk/> -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Re: [ovirt-devel] Is ovirt support node HA?
by Greg Sheremeta 05 Aug '18

05 Aug '18

Yes, HA is supported. These should help: https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.2/ht… https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.2/ht… Best wishes, Greg On Sun, Aug 5, 2018 at 3:03 AM pengyixiang <yxpengi386(a)163.com> wrote: > Is ovirt support node HA? How did they works? Is there any document about > this? like one node down, we fence this down node, and startup these vms in > others active node. > > Cheers， > Pencc > > _______________________________________________ > Devel mailing list -- devel(a)ovirt.org > To unsubscribe send an email to devel-leave(a)ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/devel@ovirt.org/message/PL2CJQPP7DEJF… > -- GREG SHEREMETA SENIOR SOFTWARE ENGINEER - TEAM LEAD - RHV UX Red Hat NA <https://www.redhat.com/> gshereme(a)redhat.com IRC: gshereme <https://red.ht/sig>

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Re: VirtIO in new upgraded 4.2.5 for FreeBSD is very poor (could not use)
by Karli Sjöberg 05 Aug '18

05 Aug '18

2 1

Re: VirtIO in new upgraded 4.2.5 for FreeBSD is very poor (could not use)
by Karli Sjöberg 05 Aug '18

05 Aug '18

2 1

Schema upgrade error while updating 4.2.4 to 4.2.5
by Jan Siml 03 Aug '18

03 Aug '18

Hello, I stumbled across the following bug when upgrading the ovirt engine from 4.2.4 to 4.2.5 (snippet from upgrade log): Running upgrade sql script '/usr/share/ovirt-engine/dbscripts/upgrade/04_02_1210_add_foreign_key_to_image_transfers.sql'... 2018-08-02 09:14:33,116+0200 DEBUG otopi.plugins.ovirt_engine_setup.ovirt_engine.db.schema plugin.execute:926 execute-output: ['/usr/share/ovirt-engine/dbscripts/schema.sh', '-s', 'localhost', '-p', '5432', '-u' , 'engine', '-d', 'engine', '-l', '/var/log/ovirt-engine/setup/ovirt-engine-setup-20180802091038-xclfnu.log', '-c', 'apply'] stderr: psql:/usr/share/ovirt-engine/dbscripts/upgrade/04_02_1210_add_foreign_key_to_image_transfers.sql:1: ERROR: insert or update on table "image_transfers" violates foreign key constraint "fk_image_transfers_command _enitites" DETAIL: Key (command_id)=(312f711f-a5c3-477d-8533-82ef88a54b77) is not present in table "command_entities". FATAL: Cannot execute sql command: --file=/usr/share/ovirt-engine/dbscripts/upgrade/04_02_1210_add_foreign_key_to_image_transfers.sql 2018-08-02 09:14:33,117+0200 ERROR otopi.plugins.ovirt_engine_setup.ovirt_engine.db.schema schema._misc:434 schema.sh: FATAL: Cannot execute sql command: --file=/usr/share/ovirt-engine/dbscripts/upgrade/04_02_12 10_add_foreign_key_to_image_transfers.sql 2018-08-02 09:14:33,119+0200 DEBUG otopi.context context._executeMethod:143 method exception Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/otopi/context.py", line 133, in _executeMethod method['method']() File "/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/ovirt-engine/db/schema.py", line 436, in _misc raise RuntimeError(_('Engine schema refresh failed')) RuntimeError: Engine schema refresh failed 2018-08-02 09:14:33,122+0200 ERROR otopi.context context._executeMethod:152 Failed to execute stage 'Misc configuration': Engine schema refresh failed Are there already instructions on how to deal with this error and does anyone know why this error occurs? Kind regards Jan

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UI plugin of billing
by 董青龙 03 Aug '18

03 Aug '18

Hi all, I want to develop an UI plugin for ovirt which aimes at translating metrics to prices like CloudKitty of openstack. Has anyone done it? Can anyone give me some advice? Thanks!

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