[ome-users] Omero Cluster Setup

[qingwei wei]

Hi Josh,

What i want to achieve is HA for Omero Server, scalability is good to have
but i can do away with that. I currently already configure Patroni for
Postgres and i would like to have Omero Server to be HA also.

Regards,

Cw

On Thu, Mar 28, 2019 at 5:09 AM Josh Moore <josh at glencoesoftware.com> wrote:

> On Wed, Mar 27, 2019 at 7:34 AM qingwei wei <tchengwee at gmail.com> wrote:
> >
> > Hi,
>
> Hi Cw,
>
>
> > I manage to setup Omero Server and Omero Web and i am currently planning
> to setup Omero Server cluster. I am currently looking at the following
> links:
> >
> > https://docs.openmicroscopy.org/omero/5.4.0/sysadmins/grid.html
> >
> https://docs.openmicroscopy.org/omero/5.4.0/developers/Server/Clustering.html
> >
> > 1. Am i right to say that grid is for distributed background processing
> and blitz is for user session?
>
> Generally, yes. The "Processor" described in the documentation is for
> running OMERO.scripts
> (
> https://docs.openmicroscopy.org/omero/5.4.10/developers/scripts/index.html
> ).
>
> > 2. For the grid setup, the example on multiple nodes is assigning
> slave-node for processor node. Can we have both master and slave running as
> processor node?
>
> Yes, that's fine. There are two layers here.
>
>  * Masters and slaves are nodes. The only thing that the master _must_
> run is the router:
>
> https://github.com/openmicroscopy/openmicroscopy/blob/develop/etc/templates/grid/default.xml#L50
>
>  * The OMERO "servers" run inside of those nodes. Processors can be
> any. It's best to only have one Blitz server in the master node. It's
> a bit out of date, but you might find looking at
> https://github.com/openmicroscopy/omero-grid-docker#running-the-images
> informative for how to launch different servers.
>
>
> > 3. For the blitz setup, am i right to say i just need to follow the grid
> setup guide but make sure i add the blitz server instance on both master
> and slave node?
>
> No. There should be only one blitz service. Unfortunately, the user
> session component is not horizontally scalable. If that's what you
> want, you might prefer to look at a read-only copy:
>
> https://docs.openmicroscopy.org/omero/5.4.10/developers/Server/Clustering.html#read-only
>
>
> > 4. I need to run this config for blitz cluster setup?
> >
> > bin/omero config set omero.cluster.redirector configRedirector
>
> That's an extension point that's not particularly used. Depending on
> what you are trying to achieve,
> it might become of value. Can you tell us more about what you would
> like to do with OMERO?
>
>
> > Thanks,
> > Cw
>
> ~J.
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