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[Engine-devel] oVirt 3.1 - New beta RPMs available
by Ofer Schreiber 04 Jul '12

04 Jul '12

New set of VDSM & oVirt Engine RPMs (Fedora 17 based) has been uploaded to ovirt.org [1] As those RPMs contains critical bug fixes, the oVirt team will appreciate any kind input and bug verification [2]. Thanks, Ofer Schreiber oVirt Release Manager [1] www.ovirt.org/releases/beta/fedora/17/ [2] Specifically, We would like to verify the following BZs: https://bugzilla.redhat.com/buglist.cgi?quicksearch=831998%20832577%2083311…

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[Engine-devel] Backend bean validation wiki
by Roy Golan 03 Jul '12

03 Jul '12

Hi All, Here's a how-to for Backend bean validation http://www.ovirt.org/wiki/Backend_Bean_Validation Comments are welcome. Thanks, Roy

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[Engine-devel] JVM version required
by Yaniv Kaul 02 Jul '12

02 Jul '12

1. Do we want to enforce a minimal JDK version required? For example, 1.7? 2. If we do, I assume we'll do it in the packaging requirement, but should we check for it at runtime (read: service startup) ? TIA, Y.

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[Engine-devel] restapi: Storage-Domain creation - Used Luns
by Ori Liel 02 Jul '12

02 Jul '12

We need to enable passing 'used' luns for new storage-domain creation (used = the lun is part of a VG). We need a way in rest-api to explicitly approve the use of such luns. Does anyone have a suggestion for a good name for such a flag, a name that conveys: "use the given luns even if they are part of a VG?" Thanks, Ori.

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Re: [Engine-devel] Developer's All In One
by Allon Mureinik 29 Jun '12

29 Jun '12

Cross-posting to engine-devel > ----- Forwarded Message ----- > From: "Yeela Kaplan" <ykaplan(a)redhat.com> > To: vdsm-devel(a)lists.fedorahosted.org, > engine-devel(a)lists.fedorahosted.org > Cc: "Ayal Baron" <abaron(a)redhat.com> > Sent: Monday, June 18, 2012 2:58:55 PM > Subject: Developer's All In One > > Enclosed is the link to a wiki containing a detailed explanation for > installing a developer's All-In-One environment: > > http://www.ovirt.org/wiki/Developers_All_In_One > > Regards, > Yeela >

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[Engine-devel] Request for code review
by Sheldon 28 Jun '12

28 Jun '12

Hi guys: My patch "add a new tool for auto-generate python entities from schema" is ready for review. http://gerrit.ovirt.org/#/c/4880/ I am looking forward to your comments. Thanks.

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[Engine-devel] fedora_17_slave_02 on jenkins
by ovirt＠qip.ru 27 Jun '12

27 Jun '12

This is a message in Mime Format. If you see this, your mail reader does not support this format. --=_67a3183659adff2f13091192092f3d88 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi, ALL=0A=0AIs it ok that node =0Afedora_17_slave_02 on http://jenkins.= ovirt.org/computer/fedora_17_slave_02/=0A=0Ahas=0AProcess leaked file de= scriptors error about two days?=0A=0ABye,=0AVadim=0A=0A-- --=_67a3183659adff2f13091192092f3d88 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi, ALL Is it ok that node <h1>fedora_17_slave_02 on http://j= enkins.ovirt.org/computer/fedora_17_slave_02/ </h1> has<pre>Proces= s leaked file descriptors error about two days?</pre> Bye, Vadim<b= r> -- --=_67a3183659adff2f13091192092f3d88--

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[Engine-devel] New Fedora VDSM Build?
by Ofer Schreiber 26 Jun '12

26 Jun '12

Any updates about $topic? -- Ofer Schreiber oVirt Release Manager

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[Engine-devel] RFC: Writeup on VDSM-libstoragemgmt integration
by Deepak C Shetty 26 Jun '12

26 Jun '12

Hello All, I have a draft write-up on the VDSM-libstoragemgmt integration. I wanted to run this thru' the mailing list(s) to help tune and crystallize it, before putting it on the ovirt wiki. I have run this once thru Ayal and Tony, so have some of their comments incorporated. I still have few doubts/questions, which I have posted below with lines ending with '?' Comments / Suggestions are welcome & appreciated. thanx, deepak [Ccing engine-devel and libstoragemgmt lists as this stuff is relevant to them too] -------------------------------------------------------------------------------------------------------------- 1) Background: VDSM provides high level API for node virtualization management. It acts in response to the requests sent by oVirt Engine, which uses VDSM to do all node virtualization related tasks, including but not limited to storage management. libstoragemgmt aims to provide vendor agnostic API for managing external storage array. It should help system administrators utilizing open source solutions have a way to programmatically manage their storage hardware in a vendor neutral way. It also aims to facilitate management automation, ease of use and take advantage of storage vendor supported features which improve storage performance and space utilization. Home Page: http://sourceforge.net/apps/trac/libstoragemgmt/ libstoragemgmt (LSM) today supports C and python plugins for talking to external storage array using SMI-S as well as native interfaces (eg: netapp plugin ) Plan is to grow the SMI-S interface as needed over time and add more vendor specific plugins for exploiting features not possible via SMI-S or have better alternatives than using SMI-S. For eg: Many of the copy offload features require to use vendor specific commands, which justifies the need for a vendor specific plugin. 2) Goals: 2a) Ability to plugin external storage array into oVirt/VDSM virtualization stack, in a vendor neutral way. 2b) Ability to list features/capabilities and other statistical info of the array 2c) Ability to utilize the storage array offload capabilities from oVirt/VDSM. 3) Details: LSM will sit as a new repository engine in VDSM. VDSM Repository Engine WIP @ http://gerrit.ovirt.org/#change,192 Current plan is to have LSM co-exist with VDSM on the virtualization nodes. *Note : 'storage' used below is generic. It can be a file/nfs-export for NAS targets and LUN/logical-drive for SAN targets. VDSM can use LSM and do the following... - Provision storage - Consume storage 3.1) Provisioning Storage using LSM Typically this will be done by a Storage administrator. oVirt/VDSM should provide storage admin the - ability to list the different storage arrays along with their types (NAS/SAN), capabilities, free/used space. - ability to provision storage using any of the array capabilities (eg: thin provisioned lun or new NFS export ) - ability to manage the provisioned storage (eg: resize/delete storage) Once the storage is provisioned by the storage admin, VDSM will have to refresh the host(s) for them to be able to see the newly provisioned storage. 3.1.1) Potential flows: Mgmt -> vdsm -> lsm: create LUN + LUN Mapping / Zoning / whatever is needed to make LUN available to list of hosts passed by mgmt Mgmt -> vdsm: getDeviceList (refreshes host and gets list of devices) Repeat above for all relevant hosts (depending on list passed earlier, mostly relevant when extending an existing VG) Mgmt -> use LUN in normal flows. 3.1.2) How oVirt Engine will know which LSM to use ? Normally the way this works today is that user can choose the host to use (default today is SPM), however there are a few flows where mgmt will know which host to use: 1. extend storage domain (add LUN to existing VG) - Use SPM and make sure *all* hosts that need access to this SD can see the new LUN 2. attach new LUN to a VM which is pinned to a specific host - use this host 3. attach new LUN to a VM which is not pinned - use a host from the cluster the VM belongs to and make sure all nodes in cluster can see the new LUN Flows for which there is no clear candidate (Maybe we can use the SPM host itself which is the default ?) 1. create a new disk without attaching it to any VM 2. create a LUN for a new storage domain 3.2) Consuming storage using LSM Typically this will be done by a virtualization administrator oVirt/VDSM should allow virtualization admin to - Create a new storage domain using the storage on the array. - Be able to specify whether VDSM should use the storage offload capability (default) or override it to use its own internal logic. 4) VDSM potential changes: 4.1) How to represent a VM disk, 1 LUN = 1 VMdisk or 1 LV = 1 VMdisk ? which bring another question...1 array == 1 storage domain OR 1 LUN/nfs-export on the array == 1 storage domain ? Pros & Cons of each... 1 array == 1 storage domain - Each new vmdisk (aka volume) will be a new lun/file on the array. - Easier to exploit offload capabilities, as they are available at the LUN/File granularity - Will there be any issues where there will be too many LUNs/Files ... any maxluns limit on linux hosts that we might hit ? -- VDSM has been tested with 1K LUNs and it worked fine - ayal - Storage array limitations on the number of LUNs can be a downside here. - Would it be ok to share the array for hosting another storage domain if need be ? -- Provided the existing domain is not utilising all of the free space -- We can create new LUNs and hand it over to anyone needed ? -- Changes needed in VDSM to work with raw LUNs, today it only has support for consuming LUNs via VG/LV. 1 LUN/nfs-export on the array == 1 storage domain - How to represent a new vmdisk (aka vdsm volume) if its a LUN provisioned using SAN target ? -- Will it be VG/LV as is done today for block domains ? -- If yes, then it will be difficult to exploit offload capabilities, as they are at LUN level, not at LV level. - Each new vmdisk will be a new file on the nfs-export, assuming offload capability is available at the file level, so this should work for NAS targets ? - Can use the storage array for hosting multiple storage domains. -- Provision one more LUN and use it for another storage domain if need be. - VDSM already supports this today, as part of block storage domains for LUNs case. Note that we will allow user to do either one of the two options above, depending on need. 4.2) Storage domain metadata will also include the features/capabilities of the storage array as reported by LSM. - Capabilities (taken via LSM) will be stored in the domain metadata during storage domain create flow. - Need changes in oVirt engine as well ( see 'oVirt Engine potential changes' section below ) 4.3) VDSM to poll LSM for array capabilities on a regular basis ? Per ayal: - If we have a 'storage array' entity in oVirt Engine (see 'oVirt Engine potential changes' section below ) then we can have a 'refresh capabilities' button/verb. - We can periodically query the storage array. - Query LSM before running operations (sounds redundant to me, but if it's cheap enough it could be simplest). Probably need a combination of 1+2 (query at very low frequency - 1/hour or 1/day + refresh button) 5) oVirt Engine potential changes - as described by ayal : - We will either need a new 'storage array' entity in engine to keep credentials, or, in case of storage array as storage domain, just keep this info as part of the domain at engine level. - Have a 'storage array' entity in oVirt Engine to support 'refresh capabilities' as a button/verb. - When user during storage provisioning, selects a LUN exported from a storage array (via LSM), the oVirt Engine would know from then onwards that this LUN is being served via LSM. It would then be able to query the capabilities of the LUN and show it to the virt admin during storage consumption flow. 6) Potential flows: - Create snapshot flow -- VDSM will check the snapshot offload capability in the domain metadata -- If available, and override is not configured, it will use LSM to offload LUN/File snapshot -- If override is configured or capability is not available, it will use its internal logic to create snapshot (qcow2). - Copy/Clone vmdisk flow -- VDSM will check the copy offload capability in the domain metadata -- If available, and override is not configured, it will use LSM to offload LUN/File copy -- If override is configured or capability is not available, it will use its internal logic to create snapshot (eg: dd cmd in case of LUN). 7) LSM potential changes: - list features/capabilities of the array. Eg: copy offload, thin prov. etc. - list containers (aka pools) (present in LSM today) - Ability to list different types of arrays being managed, their capabilities and used/free space - Ability to create/list/delete/resize volumes ( LUN or exports, available in LSM as of today) - Get monitoring info with object (LUN/snapshot/volume) as optional parameter for specific info. eg: container/pool free/used space, raid type etc. Need to make sure above info is listed in a coherent way across arrays (number of LUNs, raid type used? free/total per container/pool, per LUN?. Also need I/O statistics wherever possible.

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Re: [Engine-devel] Forking unit tests
by Allon Mureinik 26 Jun '12

26 Jun '12

----- Original Message ----- > From: "Allon Mureinik" <amureini(a)redhat.com> > To: "Mike Kolesnik" <mkolesni(a)redhat.com> > Sent: Thursday, June 14, 2012 12:12:54 PM > Subject: Re: Forking unit tests > > > > ----- Original Message ----- > > From: "Mike Kolesnik" <mkolesni(a)redhat.com> > > To: "Allon Mureinik" <amureini(a)redhat.com> > > Cc: "Laszlo Hornyak" <lhornyak(a)redhat.com>, "engine-devel" > > <engine-devel(a)ovirt.org> > > Sent: Wednesday, June 13, 2012 1:28:36 PM > > Subject: Re: Forking unit tests > > > > > Hi guys, > > > > > > If you're using settings.xml as published in Building the oVirt > > > Engine page, you'd see we're forking for every test, in every > > > subproject. > > > This behaviour was introduced to handle memory leaks in PowerMock > > > we > > > use in some subprojects, but is redundant in others. > > > > > > Over the past month or so I've been working on removing PowerMock > > > from as many places as possible (many thanks to mkolesni and > > > lhornyak!), and we've got to the stage that forking is only > > > needed > > > in to subprojects - bll and resttypes. > > > > +1 - great job! > 10x! > > > > > Would it be possible to have this as a parameter (defaul true) that > > can be overridden, such as -Dengine.forkTests=false ? > couldn't find a good way to do it <forkMode> doesn't seem to work > when given a property as a value, sorry. > :-( Take a look at http://gerrit.ovirt.org/#/c/5653/1. Once it is merged, you could user -Dengine.powermock.fork=one to stop forking. > > > > > > The forking was defined explicitly in those two projects, so if > > > you > > > want to speed up your tests, just take the latest version of > > > settings.xml from > > > http://ovirt.org/wiki/Building_oVirt_engine#Maven_personal_settings. > > > > > > > > > -Allon > > > > > >

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