Gluster users - Sep 2015 - Gluster 3.7 and OpenShift Enterprise v3

Hello,

We're evaluating OpenShift v3, which uses Docker. The manual recommends
using NFS v4 for storage. I would much prefer to use Gluster's native
client instead of NFS, mainly because the Gluster client is so easy to use.
One of our Redhat SEs says it is probably fine to use Gluster instead of
NFS v4 for now until OpenShift gets formal support for Gluster in OpenShift
3.1. I asked him why Gluster wasn't initially supported and he said it
probably came down to not having enough time to test thoroughly before
OSE's release.

Does anyone have any experience with running Docker images with Gluster
using the Gluster client? Is it possible that Redhat's recommendation is
based on the performance of NFS v4 vs Gluster? I can't seem to find
anything that says one is faster than the other. Has anyone used Gluster
with Docker (which powers OpenShift)?

Thanks for any insights.

- Ryan
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On Sunday 06 September 2015 07:34 AM, Ryan Nix wrote:
> Hello,
>
> We're evaluating OpenShift v3, which uses Docker. The manual recommends
> using NFS v4 for storage. I would much prefer to use Gluster's native
> client instead of NFS, mainly because the Gluster client is so easy to
> use. One of our Redhat SEs says it is probably fine to use Gluster
> instead of NFS v4 for now until OpenShift gets formal support for
> Gluster in OpenShift 3.1. I asked him why Gluster wasn't initially
> supported and he said it probably came down to not having enough time to
> test thoroughly before OSE's release.
>
Hi Ryan - I checked internally with the corresponding Red Hat teams and 
got a similar response. Lack of time is the core reason for going ahead 
with NFS. You can follow up with your Red Hat representatives to ensure 
that support for fuse lands in a subsequent OSE release.
> Does anyone have any experience with running Docker images with Gluster
> using the Gluster client? Is it possible that Redhat's recommendation
is
> based on the performance of NFS v4 vs Gluster?
No performance numbers have been gathered with fuse client in OSE and 
hence the question of comparison does not arise. What 
applications/workloads do you intend running in OSE?

> I can't seem to find
> anything that says one is faster than the other. Has anyone used Gluster
> with Docker (which powers OpenShift)?
>
There have been various write ups on the web about using Gluster and 
Docker. I would be very interested if someone on this list has direct 
experience with this combination.

Thanks,
Vijay