dispatch: optional parameters with default values and description for labels

[shantanugadgil]

Proposal

For parameterized jobs we can only specify the parameter name for the required or optional parameters.

How about if we could specify more information about the parameters, like:

• a default value for optional parameters
• a description field, which would be used in the Nomad GUI (in the Dispatch section)
• possibly a label field which could be used in place of the default label.
• this thought process could be enhanced further to specify the data type like string, number, etc.

Use-cases

When an operator is using the Nomad GUI, I would like to have the "default" value of the optional parameter populated in the GUI. Also, on a mouseover on the paramter, I would like to see the description which would help the user to fill in correct values.

Attempted Solutions

N/A

*** I understand that this would essentially turn the parameter list from a "list-of-strings" to a "list-of-maps", which might be considered a big change.