Re: Ceph iSCSI is a prank?

[Adrian Saul <Adrian.Saul@xxxxxxxxxxxxxxxxx>]

 

We are using Ceph+RBD+NFS under pacemaker for VMware.  We are doing iSCSI using SCST but have not used it against VMware, just Solaris and Hyper-V.

It generally works and performs well enough – the biggest issues are the clustering for iSCSI ALUA support and NFS failover, most of which we have developed in house – we still have not quite got that right yet.

 

 

 

From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Daniel K
Sent: Saturday, 3 March 2018 1:03 AM
To: Joshua Chen <cschen@xxxxxxxxxxxxxxxxxxx>
Cc: ceph-users@xxxxxxxxxxxxxx
Subject: Re: [ceph-users] Ceph iSCSI is a prank?

 

There's been quite a few VMWare/Ceph threads on the mailing list in the past.

 

One setup I've been toying with is a linux guest running on the vmware host on local storage, with the guest mounting a ceph RBD with a filesystem on it, then exporting that via NFS to the VMWare host as a datastore. 

 

Exporting CephFS via NFS to Vmware is another option.

 

I'm not sure how well shared storage will work with either of these configurations. but they work fairly well for single-host deployments.

 

There are also quite a few products that do support iscsi on ceph. Suse Enterprise Storage is a commercial one, PetaSAN is an open-source option.

 

 

On Fri, Mar 2, 2018 at 2:24 AM, Joshua Chen <cschen@xxxxxxxxxxxxxxxxxxx> wrote:

Dear all,

  I wonder how we could support VM systems with ceph storage (block device)? my colleagues are waiting for my answer for vmware (vSphere 5) and I myself use oVirt (RHEV). the default protocol is iSCSI.

  I know that openstack/cinder work well with ceph and proxmox (just heard) too. But currently we are using vmware and ovirt.

 

 

Your wise suggestion is appreciated

 

Cheers

Joshua

 

 

On Thu, Mar 1, 2018 at 3:16 AM, Mark Schouten <mark@xxxxxxxx> wrote:

Does Xen still not support RBD? Ceph has been around for years now!

Met vriendelijke groeten,

 

-- 

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Van: Massimiliano Cuttini <max@xxxxxxxxxxxxx>
Aan: "ceph-users@xxxxxxxxxxxxxx" <ceph-users@xxxxxxxxxxxxxx>
Verzonden: 28-2-2018 13:53
Onderwerp: [ceph-users] Ceph iSCSI is a prank?

I was building ceph in order to use with iSCSI.
But I just see from the docs that need:

CentOS 7.5
(which is not available yet, it's still at 7.4)
https://wiki.centos.org/Download

Kernel 4.17
(which is not available yet, it is still at 4.15.7)
https://www.kernel.org/

So I guess, there is no ufficial support and this is just a bad prank.

Ceph is ready to be used with S3 since many years.
But need the kernel of the next century to works with such an old technology like iSCSI.
So sad.

 

 

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