[PVE-User] Proxmox on DRBD and OCFS2/GFS
elacunza at binovo.es
Mon Aug 26 11:11:56 CEST 2013
On 26/08/13 10:53, Marco Gabriel - inett GmbH wrote:
> has anybody tried to use OCFS2 or GFS on top of DRBD for a Proxmox VE
> What I discovered so far:
> ·OCFS2 is not in the kernel, not built-in and not available as a module.
> ·GFS2 is in the kernel, but depends on cman package. Cman .deb package
> conflicts with Proxmox .deb packages.
> Any ideas or experiences with such setups on Proxmox?
> From my point of view, this sounds like an ideal thing for a two node
We did test such a setup about 1-2 years ago. What we found was that:
- REALLY, you have to setup fencing right for cluster filesystems
- DRBD seemed to have troubles back then recovering properly after both
nodes were shut down (ie, because a power outage, rack, rearrangement,
We finally discarded it (were trying active-active configuration)
in-house, we felt it gave us more headaches than the peace-of-mind
potentially gained by a shared-storage HA setup. We didn't have
experience with DRBD so maybe it was us not setting up correctly.
Yet, we're using it in active-passive configuration in a client, though.
They're quite happy, the only problem happened when both nodes went down
after a cascade of power failures, we had to go onsite for manual
intervention, but it was up and running in 30 minutes, with no data loss.
My advice is to carefully weight the need for a "shared" storage in your
cluster against the added complexity. Also, is you're writing from both
nodes at the same time, your I/O will suffer a lot.
Zuzendari Teknikoa / Director Técnico
Binovo IT Human Project, S.L.
Astigarraga bidea 2, planta 6 dcha., ofi. 3-2; 20180 Oiartzun (Gipuzkoa)
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