Can't disable Ansible's host key checking

Question

I\'m using Ansible 1.5.4 to provision my Vagrant 1.4.3 box on Ubuntu 14.04 LTS.

I\'m getting the following error message in verbose mode:

Answer 1

You'll need to set it via the Vagrantfile of the project. When the Vagrant Ansible provisioner makes the call to ansible-playbook it always sets the value of the ANSIBLE_HOST_KEY_CHECKING environment variable.

Ansible itself takes the value of the environment variable if present. Therefore Vagrant will override the value used in your ansible.cfg.

Therefore you just need something like:

machine.vm.provision :ansible do |ansible|
  ansible.host_key_checking = false
  # etc.
end