Il 29/07/2014 09:38, Maël Lavault ha scritto:
Le mercredi 23 juillet 2014 à 01:09 +0300, Itamar Heim a écrit :
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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Thanks !!
So I did a fresh install with oVirt 3.4.3
I configured my bond before installing oVirt and was able to install without a hitch.
It becomes more complicated afterward. I still want to use VLANs on top of my bond, but with hosted engine I can't configure this properly.
Please open a bug, attaching hosted-engine-setup logs and vdsm logs. I would like to track why you can't configure it properly.
If I change the vlan tag in oVirt interface, I lost connection to the engine, and also the network config is messed up or incomplete after, I also can't add new nic card to self hosted engine vm (it says the vm is not managed by the engine ?!?)
This seems to be a different issue, maybe worth another bz.
My port are configured as trunk allowing VLAN 1,3,4 (1: public, 3: nfs, 4: ovirtmgmt, that's for testing purpose)
Should I also configure my Vlan manually before installing oVirt (eg: bond0.1, bond0.3 and bond0.4) ?
I've never tested mixed bond and vlans on my system so not sure about what happens there.
Second hosted engine install fine now.
Great!
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