add Constraints (Node and Attr)

[jagedn]

Allow to add constraints in Job or Task

Current PR implements Node constraints and a partial list of Attr constraints

[jagedn]

Implemented a raw constraint (in node and attr) so users can add custom/specific constraints, for example:

constraints{
   attr {
       raw 'platform.aws.instance-type', '=', 'm4.xlarge'
   }
}

[abhi18av]

Implemented a raw constraint (in node and attr) so users can add custom/specific constraints, for example:

Ah, this is good! Provides an escape hatch for things we can't foresee for now.

But, as of 08b82b1 is the following working for you with the intended effect?

 ./run-all.sh --skiplocal --build --nfsun --demo

On the Nomad portal, I can't see any of the constraints/attr show up

[jagedn]

the nextflow.config has 2 typos

constraints: {    // wrong, is an assignment "constraints = {"
            attr {
                unique = [hostName:'nomad02']    // typo, hostname is lowercase
            }
        }

once fixed the constraint is applied

[abhi18av]

Great!

I can confirm, that this is working nicely with the our pure fusionfs based sun-nomadlab cluster 🎉