Op 17-11-2025 om 19:07 schreef Paketix:
Thanks for all your feedbacks!
I will go for NFS in a first version to keep complexity low.
Maybe I will have multiple NFS servers after a while for both primary
and secondary storage ...
Do understand that NFS itself says nothing about redundancy. If you just
use a single server which provides and NFS-export it "works", but there
is no redundancy.
Either you need to use a storage appliance like TrueNAS Enterprise,
NetApp, etc to provide HA NFS or you need to re-think your storage strategy.
Just keep in mind that NFS is just a protocol and nothing else.
Other storage solutions like Ceph and for example StorPool are something
completely different.
Wido
Do I have to specify the storage to use in each compute offering or will
ACS store stuff to additional primary/secondary storage 'automagically'?
On 17.11.25 15:57, Alex Mattioli wrote:
Echoing what Wido said, CEPH is a platform while NFS is just a
protocol, one which CEPH can serve as well.
But I do agree, to start a simple cloud NFS is the easiest way to go,
by far.
-----Original Message-----
From: Jürgen Gotteswinter <[email protected]>
Sent: 17 November 2025 15:36
To: [email protected]
Subject: Re: Which technology to choose for shared primary storage
I am not so sure if Ceph is a solution which can/should be suggested
as first choice in general. NFS has its own problems, but also has
advantages. One is that its easy, reliable and most of the time
performance is more than sufficient. To get things started, NFS is not
a bad choice.
Am 17.11.25, 15:25 schrieb "Alex Mattioli"
<[email protected] <mailto:[email protected]>>:
+1 on that, if I were to build a cloud from the ground up I'd 100% use
CEPH
-----Original Message-----
From: Wido den Hollander <[email protected]
<mailto:[email protected]>LID>
Sent: 17 November 2025 14:45
To: [email protected] <mailto:[email protected]>;
João Jandre Paraquetti <[email protected]
<mailto:[email protected]>>
Subject: Re: Which technology to choose for shared primary storage
Op 14-11-2025 om 19:40 schreef João Jandre Paraquetti:
Hello, Paketix
I would say that the easiest to deal with and most compatible protocol
is NFS.
The next paragraphs assume we are talking about using these storage
types with KVM as the hypervisor.
The "problem" with FC and iSCSI, when using KVM, is that you'll need
an extra layer on top of them (a clustered FS, such as OCFS2) in order
to add them as shared mountpoint to ACS. This adds a bit of complexity
and I personally am not very fond of the current open source clustered
FS options available. Regardless, most (if not all) features that are
added to NFS are also added to shared mountpoint primary storages as
they are basically the same from ACS's point of view.
There is an option for adding FiberChannel primary storage directly,
however, as far as I know, it only works for a specific storage
vendor, and I doubt there are as many features for it as the other
common options.
I know that there exists the CLVM option when adding a storage, but I
have never tested it and never seen it being discussed in the community.
I haven't seen many new features released that target RBD (Ceph) for a
while, but you may create a CephFS with Ceph, which could be added to
your environment as a shared mount point as well.
RBD/Ceph is very stable inside CloudStack. Not much work is needed
there as the current code has been working for a long time.
Comparing NFS to Ceph is Apples vs Oranges. NFS is just a protocol
where Ceph is a complete distributed storage environment with
scability and failover build-in to the whole system.
Ceph is more than capable to be used as primary storage underneath
CloudStack, but it's simply not NFS just like Ceph is not NFS.
Wido
Best regards,
João
On 11/14/25 15:04, Paketix wrote:
I am new to CloudStack and could need some help/advise regarding
which technology to use to implement my shared storage (primary
storage).
Having some FibreChannel stuff in the lab this could work well.
... but I am concerned that this is not the direction CloudStack is
developing into.
So:
- NFS
- iSCSI
- Ceph
... would be the choices regarding the docs.
Not sure if iSCSI would fit for shared storage as I do not see it in
the list of protocols supported for primary storage in GUI.
What is the most future-proof solution to choose for primary storage?
I want to stay on the main-path CloudStack is going to, so I can use
new features coming out in the next months and not being blocked by
'sorry, not supported for your protocol'
