Generated ssh configuration ControlPath is too coarse

[mrled]

Description

The ssh config files in ~/.lima/MACHINE/ssh.config include:

Host lima-MACHINE
  ControlMaster auto
  ControlPath "/Users/USERNAME/.lima/MACHINE/ssh.sock"
  ControlPersist yes
  # ...

If you want to be able to connect to the machine as more than one user, this configuration breaks it in a confusing way.

user@host$ ssh firstuser@lima-MACHINE
firstuser@lima-MACHINE$ whoami
firstuser
firstuser@lima-MACHINE$ exit
user@host$ ssh seconduser@lima-MACHINE
firstuser@lima-MACHINE$ whoami
firstuser

As a workaround you can put a line like this in ~/.ssh/config before the lima include:

Host lima-MACHINE
  ControlPath ~/.lima/MACHINE/ssh.sock.%r

Include ~/.lima/*/ssh.config

But it would be nice if lima would configure this itself.

(You might prefer to use ~/.lima/MACHINE/ssh.sock.%C, which includes a hash of the username/hostname/port. The hostname doesn't help here, but the port might be useful if the user ever wanted to run a second ssh server on a different port.)

[afbjorklund]

The files in ~/.lima are not readable by other users, so you need something more than just renaming the file.

[mrled]

I don't mean connect from multiple users on the host machine; I mean connecting to multiple users in the guest machine.

[afbjorklund]

Ah right, my bad. I don't think we add more than one user to the machine, but that looks like a valid improvement...