multipath support

[pcahyna]

there is a role for configuring multipath: https://github.com/cdomingos/ansible-role-multipath , would it make sense to integrate it? @cdomingos

[cdomingos]

initially I think it makes more sense to create a new repository

[cdomingos]

Maybe integrating the code is not a good idea and it may disrupt the user's understanding.
I think each role has its purpose...

What do you think? @pcahyna

I am willing to contribute

[tabowling]

It would make sense for query functionality to report the full path from Mount point to lowest level hardware and all the layers in between. We have received requests to make this visibility easier. But at this time no clear requests for making changes to multipath settings.

[dwlehman]

@tabowling blivet can already describe the relations from mount point through multipath device and down to individual paths. What is cannot do is generate a custom multipath.conf file like @cdomingos role does.