DUCC multi-node installation. Beginner's questions.

[Sergii Poluektov <se...@googlemail.com>]

Hello Everyone,

I am now trying to install DUCC in a cluster of 3 nodes. I went through and
completed a single-user installation of DUCC on each of my 3 boxes.
On each of them a passwordless ssh access for the user ducc has been
configured.

The documentation states:
"All systems in the DUCC cluster must have a shared filesystem and shared
user space (user directories are shared over NFS or an equivalent networked
file system, across the systems, and user ids and credentials are the
same)."

I am only starting with the cloud computing and that is why I am not sure
how to meet this requirement.
How I imagine this is that there is one master node being an NFS server
which shares its /home/ducc directory and there are 2 slave nodes being NFS
clients which can access the /home/ducc directory of the master.
Does it make sense?

I read the documentation as well as the mailing list very carefully but
unfortunatelly could not figure this out.
Maybe someone has a description of the NFS installation for some other but
similar cluster system?

Thanks in advance for the help.

Cheers,
Sergii

Re: DUCC multi-node installation. Beginner's questions.

[Eddie Epstein <ea...@gmail.com>]

Hi Sergii,

Thanks much for the suggested documentation change.
DUCC v2.0 is getting close to release and now will have this info.

Eddie

On Thu, Jul 23, 2015 at 3:03 AM, Sergii Poluektov <
sergii.poluektov@googlemail.com> wrote:

> Hi Eddie,
>
> thanks a lot for your promt reply.
> Yesterday I finally managed to set up my nodes.
>
> Maybe it is not a bad idea to edit the documentation a bit, so that it is
> explicitely written, that DUCC has to be installed once on one node, and
> then
> the installation directory has to be mounted on the same spot on all the
> other
> nodes.
> Maybe it will save someone like me a couple of hours.
>
> Thanks again and cheers,
> Sergii
>
> On Wed, Jul 22, 2015 at 3:02 PM, Eddie Epstein <ea...@gmail.com>
> wrote:
>
> > Hi Sergii,
> >
> > The ducc_runtime tree needs to be installed on a shared filesystem
> > that all DUCC nodes have mounted in the same location. Just install
> > the ducc runtime once from the DUCC head node. All other DUCC
> > nodes simply need to have the mounted filesystem and common user
> > accounts with identical user and group IDs.
> >
> > An NFS shared filesystem as you describe would be fine, and the
> > same filesystem could be used for providing shared user space,
> > typically the users home directories.
> >
> > Eddie
> >
>

Re: DUCC multi-node installation. Beginner's questions.

[Sergii Poluektov <se...@googlemail.com>]

Hi Eddie,

thanks a lot for your promt reply.
Yesterday I finally managed to set up my nodes.

Maybe it is not a bad idea to edit the documentation a bit, so that it is
explicitely written, that DUCC has to be installed once on one node, and
then
the installation directory has to be mounted on the same spot on all the
other
nodes.
Maybe it will save someone like me a couple of hours.

Thanks again and cheers,
Sergii

On Wed, Jul 22, 2015 at 3:02 PM, Eddie Epstein <ea...@gmail.com> wrote:

> Hi Sergii,
>
> The ducc_runtime tree needs to be installed on a shared filesystem
> that all DUCC nodes have mounted in the same location. Just install
> the ducc runtime once from the DUCC head node. All other DUCC
> nodes simply need to have the mounted filesystem and common user
> accounts with identical user and group IDs.
>
> An NFS shared filesystem as you describe would be fine, and the
> same filesystem could be used for providing shared user space,
> typically the users home directories.
>
> Eddie
>

Re: DUCC multi-node installation. Beginner's questions.

[Eddie Epstein <ea...@gmail.com>]

Hi Sergii,

The ducc_runtime tree needs to be installed on a shared filesystem
that all DUCC nodes have mounted in the same location. Just install
the ducc runtime once from the DUCC head node. All other DUCC
nodes simply need to have the mounted filesystem and common user
accounts with identical user and group IDs.

An NFS shared filesystem as you describe would be fine, and the
same filesystem could be used for providing shared user space,
typically the users home directories.

Eddie