Feature Idea: Better Support for 3rd party logging solutions.

Logs are something that should just be automagic in a clustered environment. Teams shouldn't need to think about them and they should be managed by the infrastructure. Supporting these systems also shouldn't break nomad's built-in log management, so changing things like the global docker logging configuration isn't really a solution.

I propose a patch to logmon to allow it to dupe the log streams to a second well-known location. This location should name the files something like {{.NodeName}}-{{.Job}}-{{.Group}}-{{.Task}}-{{.AllocID}}. Bonus points for making this a templatable string!

I don't think this is a particularly complex feature to support, but it would open up running log management solutions like loki as one-click options within nomad. More importantly, it would generally allow other log indexing to work without breaking build in logs commands.

Start by locating Nomad's logmon implementation and reading how its existing log management handles task log streams. Define the second destination and filename template behavior without changing built-in log commands; done means streams can be duplicated to the additional location with the proposed allocation details in filenames.

Written by the indexing model from the issue text.