Boot2Docker searching for docker-bootstrap.sock which does not exist
Docker should create this file for you. Are you running this command on your OS X machine? or are you running it inside the boot2docker VM?
I think you need to:
boot2docker ssh
Then:
sudo sh -c 'docker -d -H unix:///var/run/docker-bootstrap.sock -p /var/run/docker-bootstrap.pid --iptables=false --ip-masq=false --bridge=none --graph=/var/lib/docker-bootstrap 2> /var/log/docker-bootstrap.log 1> /dev/null &'
You need to make sure that command runs on the Vagrant Linux box that boot2docker creates, not your OS X machine.
Hope that helps!