Vagrant报告一个没有任何运行的端口冲突

Question

I'm getting a port collision on all the ports in my Vagrantfile which seems to work fine for a time then suddenly something changes and it refuses to work. Please no answers saying "change your port"

Vagrant cannot forward the specified ports on this VM, since they
would collide with some other application that is already listening
on these ports. The forwarded port to 3100 is already in use
on the host machine.

To fix this, modify your current project's Vagrantfile to use another
port. Example, where '1234' would be replaced by a unique host port:

  config.vm.network :forwarded_port, guest: 1337, host: 1234

I have done what i can to find the problem but it's elluding me at the moment.

lsof -n -i4TCP:3100

Outputs nothing

I'm running vagrant 1.9.2 with vagrant-vmware-fusion (4.0.18)

Answer 1

Ok i think i've cracked it. It seems to be related to this issue

https://github.com/mitchellh/vagrant/issues/7948

the vagrant-vmware-plugin isn't clearing out the nat.conf in fusion. Therefore it still thinks that the ports are in use when they aren't.

editing /Library/Preferences/VMware Fusion/vmnet8/nat.conf and removing the offending entries in the [incomingtcp] section appears to solve it.

Guess it's just about managing that until a proper fix becomes available.

For reference this is fusion 8.5.3 and vagrant-vmware-fusion 4.0.18.