checking group membership in Ansible templates

I use SolusVM as a virtualization solution, mainly because it’s pretty cheap and mostly effective. The new web-managed migration feature requires that the master node have SSH access into the slave nodes. As root. (Insert lots of swearing here.)

This isn’t a problem, except that I centrally manage my OpenSSH configuration with Ansible. I don’t want all of my hosts to permit the master SolusVM node to log in as root; I only want the Solus hosts to get that setting, and even then only from the m...