Pre-start configuration using vctl

[craig8]

Is your feature request related to a problem? Please describe.
Configuration in the new modular with messagebus, auth and dynamically loaded classes could be a barrier for adoption. This feature will address that.

Describe the solution you'd like
Create a vctl system subparser for configuration of the messagebus and the local/remote client connections. Looking back at the original guidlines for modular we see.

Proposed commands

• # Allow the user to specify the messagebus pypi packages and discover the correct MessageBusInterface 
  # from the installed pypi packages.  The with auth would be able automatically included just like our current 
  # platform is "authenticated by default" but allows a --without-auth to turn the whole auth system off.  
  
  vctl system messagebus volttron-lib-zmq  --with-auth   --without-auth
  vctl system messagebus volttron-lib-xxmq --with-auth
  

•  # With autocomplete using click/typer etc we can then discover the messagebus, auth, and service configurations 
   # available for the local sytem
  
   vctl system status
   vctl system service servicename --list  # Shows the configuration for servicename
   vctl system service my.auth.system param value   # Sets the name/value pairs
   vctl system service my.auth.system yamlfile # More advanced complete wipe of the configuration for my.auth.system
  
  

• Allow an agent to run in the foreground against a host configuration.
  vctl run agent host
  

• # Allow the system to start up i.e. run volttron in background etc
  vctl system start / stop
  

[craig8]

After talking with @shwethanidd the ultimate goal of the command line options is to handle the following configuration files.

~/.volttron/config
[volttron]
instance-name = WE40572
address = tcp://127.0.0.1:22916
agent-isolation-mode = False
message-bus = volttron.messagebus.zmq

auth = True/False

And service_config.yml which I haven't copied an example of.

.volttron/service_config.yml

[craig8]

Original with all the bells

[volttron]
instance-name = WE40572
address = tcp://127.0.0.1:22916
agent-isolation-mode = False
message-bus = volttron.messagebus.zmq.ZmqMessageBus
agent-core = volttron.messagebus.zmq.ZmqCore
authentication-class = volttron.messagebus.zmq.ZmqAuthentication
authorization-class = volttron.messagebus.zmq.ZmqAuthorization
auth-service = volttron.services.auth
service-config = /home/d3m614/.volttron_crap/service_config.yml

[craig8]

Example of zmq

python3.10 -m venv .venv

source .venv/bin/activate

# Assume that Authentication and Authorization are implement within a dependency of volttron-zmq
pip install volttron-zmq volttron-lib-auth

volttron -vv

Example mqtt

python3.10 -m venv .venv

source .venv/bin/activate

pip install volttron-mqtt spiffy volttron-spiffy volttron-lib-auth volttron-tls

volttron -vv