[ovirt-users] Re: Q: Hybrid GlusterFS / local storage setup?
Hi Gilboa,
I think that storage domains need to be accessible from all nodes in the cluster - and as
yours will be using local storage and yet be in a 2-node cluster that will be hard.
My guess is that you can try the following cheat:
Create a single brick gluster volume and do some modifications:
- volume type 'replica 1'
- cluster.choose-local should be set to yes , once you apply the virt group of settings
(cause it's setting it to no)
- Set your VMs in such way that they don't failover
Of course, creation of new VMs will happen from the host with the SPM flag, but the good
thing is that you can change the host with that flag. So if your gluster has a brick
ovirt1:/local_brick/brick , you can set the host ovirt1 to 'SPM' and then create
your VM.
Of course the above is just pure speculation as I picked my setup to be 'replica 3
arbiter 1' and trade storage for live migration.
Best Regards,
Strahil Nikolov
В сряда, 14 октомври 2020 г., 12:42:44 Гринуич+3, Gilboa Davara <gilboad(a)gmail.com>
написа:
Hello all,
I'm thinking about converting a couple of old dual Xeon V2
workstations into (yet another) oVirt setup.
However, the use case for this cluster is somewhat different:
While I do want most of the VMs to be highly available (Via 2+1 GFS
storage domain), I'd also want pin at least one "desktop" VM to each
host (possibly with vGPU) and let this VM access the local storage
directly in-order to get near bare metal performance.
Now, I am aware that I can simply share an LVM LV over NFS / localhost
and pin a specific VM to each specific host, and the performance will
be acceptable, I seem to remember that there's a POSIX-FS storage
domain that at least in theory should be able to give me per-host
private storage.
A. Am I barking at the wrong tree here? Is this setup even possible?
B. If it is even possible, any documentation / pointers on setting up
per-host private storage?
I should mention that these workstations are quite beefy (64-128GB
RAM, large MDRAID, SSD, etc) so I can spare memory / storage space (I
can even split the local storage and GFS to different arrays).
- Gilboa
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