If this is the case, the storage plug-in framework needs to be adaptive to that a datastore may be preset from external source. Creating VMFS datastore involves with complex interactive flow, for example, it requires administrator to enable iScsi adapter on every ESX host under a cluster. It does not make sense for CloudStack to get involved in vCenter's own business.
Kelven On 3/20/13 6:06 PM, "Mike Tutkowski" <mike.tutkow...@solidfire.com> wrote: >Thanks, Kevlen > >That makes sense that in pre 4.2 we don't use VI SDK to create a datastore >as we require the datastore to be set up ahead of creating Primary >Storage. > >However, as far as I understand Edison's 4.2 storage plug-in framework, >which creates the necessary storage when a VM is spun up or a data disk is >created, CS will need to interact with VMware to create a datastore to map >the newly created SAN volume into so that CS can make Primary Storage for >it. > >This is my understanding of the 4.2 plug-in framework: > >* You create a storage plug-in. > >* Primary Storage can be associated with this plug-in (as opposed to being >associated with pre-existing storage). > >* When a Compute or Disk Offering is executed and it is tagged to use >Primary Storage that makes use of this plug-in, the plug-in is invoked to >create the necessary storage (let's say an iSCSI volume). > >* A datastore (for VMware) or a storage repository (for XenServer) then >needs to be created for the SAN volume to be utilized from CS. > >* The VM or data disk is placed on the datastore or storage repository and >it (the VM or data disk) is the only object that ever utilizes this >datastore or storage repository. > > >On Wed, Mar 20, 2013 at 5:32 PM, Kelven Yang <kelven.y...@citrix.com> >wrote: > >> We don't use VI SDK in CloudStack for VMware integration. >> >> For VMFS datastore, CloudStack will not create it and will rely on >>vCenter >> to do it. To enable a VMFS datastore involves a series of steps, the >>flow >> is provided by vCenter. >> >> Kelven >> >> On 3/20/13 1:26 PM, "Mike Tutkowski" <mike.tutkow...@solidfire.com> >>wrote: >> >> >Hi everyone, >> > >> >Has anyone every used the VI SDK or the VI Java API to create a VMFS >> >datastore that makes use of an iSCSI target? >> > >> >I've been searching all over Google for some decent sample code. I've >> >found bits and pieces (more about NFS than iSCSI), but nothing that >>brings >> >it all together. >> > >> >This was fairly easy to do with XenServer, but VMware seems to be >>lacking >> >in the sample-code area. >> > >> >Thanks! >> > >> >-- >> >*Mike Tutkowski* >> >*Senior CloudStack Developer, SolidFire Inc.* >> >e: mike.tutkow...@solidfire.com >> >o: 303.746.7302 >> >Advancing the way the world uses the >> >cloud<http://solidfire.com/solution/overview/?video=play> >> >* * >> >> > > >-- >*Mike Tutkowski* >*Senior CloudStack Developer, SolidFire Inc.* >e: mike.tutkow...@solidfire.com >o: 303.746.7302 >Advancing the way the world uses the >cloud<http://solidfire.com/solution/overview/?video=play> >**
