Deploying on Ubuntu 14.04 is now impossible as the nodesource gpg can't be imported because default python version doesn't support sni.
This is exactly what's described in nodesource/ansible-nodejs-role#33
There there are several solutions proposed. The easiest one is to replace the add nodesource apt-key task in the dev role for:
- name: Import the NodeSource GPG key into apt
apt_key:
id: 68576280
url: "https://keyserver.ubuntu.com/pks/lookup?op=get&fingerprint=on&search=0x1655A0AB68576280"