Release notes

Summary

This release includes the following products:

evltgw products

Product	Product version	RPM version
executables and libraries	1.3.0	elt-eltgw-1.3.0.fc38.x86_64
include files	1.3.0	elt-eltgw-devel-1.3.0.fc38.x86_64
documentation	1.3.0	elt-eltgw-doc-1.3.0.fc38.noarch
puppet	1.3.0	puppet-evltgw-1.3.0.fc38.noarch

The links to the components release in Gitlab are:

• evltgw release

For the vlt gateway, no rpm is available. Version 1.3.0 is available in git at evltgw tags.

What is the scope of this version ?

Version 1.3.0 supports all the use cases that have been defined for the ELT-VLT gateway.

What is new in this release ?

These new uses cases are implemented:

• Forward commands from VLT INSSW to an ELT component (e.g. COSMIC)

• Forward updates of configurable ELT OLDB telescope data points to their VLT OLDB counterparts

What is the purpose of the gateway release ?

• To provide a bridge between a VLT and ELT environment.

• To provide a prototype that will allow to refine or add requirements based on the feedback of the first users.

Some of the third party products and middleware solutions used by the gateway are:

• ZeroMQ for implementing REQ/REQ between the two gateway components.

• Google Proto Buffers for serialization/deserialization.

• Google tests and Mockup libraries for unit tests.

• Robot Framework for integration tests.

• Nomad/Consul for software deployment.

Development Environment

• For the ELT-GW, the elt development environment is 5.2 on Fedora 38.

• For the vlt-GW, vlt software version is VLT2024 on AlmaLinux release 9.1.

Components

The evltw consists of two components:

• ELT-GW: it exposes a MAL interface that will be used by elt instruments to send commands to telescopes and a MAL interface that allows the registration of ELT components to which vlt commands will be forwarded. It updates as well a TCS tree in the ELT OLDB according to the updates sent by the VLT-GW and forwards updates of elt oldb data points to their vlt counterparts.

• VLT-GW: it receives commands from the ELT-GW that it forwards to the TCS and forward commands from a vllt instrument to the elt gateway. It also forwards any change in the TCS tree in the VLT OLDB to the ELT-GW and supports scanning from elt to vlt.

Known Problems

None