Design an approach to port conflicts

[mike w]

Port conflicts are inevitable among installed apps, since all are placed on the same shared network. Design an approach to preventing these.

Some ideas:

• Prior to install, scan all existing compose files for all declared/exposed ports, and throw an error if a conflict is being created.
  • This seems most robust.
• Add a new variable type named "port", and use it when ports are declared; check against all ports upon install.
  • This only works for ports exposed to variables - a compose file may bring along other exports.