Re: [ovirt-users] Misc architecture questions

On 07/17/2014 11:14 AM, Maël Lavault wrote: > Hi, > > I'm a student currently doing my final study project based around Ovirt. > > I played a lot with Ovirt to have an overview of what could or could not > be done, but I still have a few questions and stuff I want to clarify. > > My project consist of a HA architecture using Ovirt, powered by 8 > reasonably powerful servers (4 x Quad core Opteron, 32Go RAM, 2x10k RPM > HDD) equipped with 2 NIC each. > > I followed this tutorial to use Ovirt with GlusterFS : > > http://community.redhat.com/blog/2014/05/ovirt-3-4-glusterized/ > > Worked well ! > > I installed 2 self hosted engine on 2 different servers and a GlusterFS > using 2 other servers. > > But since we had only 2 x 1Gb NIC per server, we decided to go with > bonding and VLAN to separate each networks inspired by this blog post : > > http://captainkvm.com/2013/04/maximizing-your-10gb-ethernet-in-rhev/ > > Unfortunately, it seems like Ovirt 3.4 does not support installing > self-hosted engine on bond + vlan. I tried 3.5 but there were to much > bug to be usable and the project is set to be deployed in 2 months. should be available via: http://gerrit.ovirt.org/#/c/29730/ ?

> > A colleague suggested me a workaround using OpenvSwitch between Ovirt > and NIC bond to "translate tagged packet into non tagged packet" and > hide the bond from Ovirt. Does this have a chance to work ? > > Since the GlusterFS is accessed by NFS, I was able to bond the two > servers. > > A few questions : > > - What is the purpose of ovirtmgmt network ? I did a lot of search by > haven't found any clear explanation. Does it need to be publicly > accessible or a private ip is fine too ? just what engine used to communicate to hosts. also, by default, the display network and vm network. > > - Is the display network used for SPICE/VNC connection ? yes. > > - How do Ovirt differentiate VM network from a storage network ? They > both have the same vm role in the interface. Both networks could > (should) be on private ip range right ? that depends on you deploying them on different networks? > > - How can I add the storage network after (or before, would be better) > self hosted engine is installed ? (Since self hosted engine is stored on > Gluster, I will loose connection to the engine) configure it on host B. move hosted engine to host B. configure it on host A? > > - Using self hosted engine, does all my nodes need to be installed with > hosted-engine --deploy, or can I have only 2 self hosted engine nodes > and 4 classic nodes ? you can have 2 self hosted and 50 classic nodes as well. no need to match hosted engine to the entire cluster (nor is hosted engine tested with being deployed on 50 hosts...) > > - I'm trying to cleanly re-install the second hosted engine after some > experiments, but the behavior is strange : > > [ INFO ] Stage: Transaction commit > [ INFO ] Stage: Closing up > To continue make a selection from the options below: > (1) Continue setup - engine installation is complete > (2) Power off and restart the VM > (3) Abort setup > Isn't this supposed to give me information to connect to the vm so i can > install the engine ? sandro/didi?

> > Thanks a lot for this truly well made software ! thank you for using it.

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