objc errors when running cloudalchemy.node-exporter role from a Mac

[jehanalvani]

When running the cloudalchemy.node-exporter role from a relatively recent Mac, the playbook will fail with objective C errors. More details can be found here:

nitzmahone in ansible/ansible

This is apparently due to some new security changes made in High Sierra that are breaking lots of Python things that use fork(). Rumor has it that adding export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES before your Ansible run should clear it up. The code that's causing issues is well below Ansible in the stack.

Confirmed this is the case. Noting here for future reference.