Hi,
on behalf of Alessio I would like to propose a new community module that
allows
GeoServer WPS to discover, run and monitor processes running on one or more
remote machines.
This setup is popular in scenarios where one has long lived and resource
hungry processes that
require a dedicated machine to run (e.g., some large satellite imagery
processes,
simulation or weather models, that can take hours and chew a lot of of
memory per run),
as well as the "dockerization" trend in which algorithm providers are
simply shipping a
docker container fully setup with the executable to be run and its specific
environment
(in scientific apps that can be _very_ specific), which regardless of the
physical setup, effectively
makes it run on a separate node.
The module is easier to explain with a picture:
[image: Inline image 1]
Basically on the GeoServer side we have a custom process factory that
discovers and exposes
processes, on the other end we have some support to describe and execute
the processes, and
in the middle we have a XMPP server acting as the network protocol, plus
eventual file system sharing
for large inputs/outputs.
XMPP was chosen as a suitable cross language communication mechanism,
indeed, while the
GeoServer module is pure java (pull request in preparation here:
https://github.com/geosolutions-it/geoserver/tree/wps-remote),
while the reference implementation of the other end is python based instead:
https://github.com/geosolutions-it/wps-remote-backend-XMPP
We'd like to contribute the GeoServer module, along with docs, as a
community one, and if possible
add the reference python implementation as a new repository in the
https://github.com/geoserver/ organization,
to stress its open status and encourage more people to take part.
As this is a community module there is no feature freeze rush, but I guess
it would be nice to
have it in anyways in order to add it to the beta announcement
Feedback welcomed
Cheers
Andrea
--
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Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
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