This post is older than a year. Consider some information might not be accurate anymore.
Ansible is a free-software platform for configuring and managing computers which combines multi-node software deployment, ad hoc task execution, and configuration management by Red Hat. It is also possible to make groups of groups using the
A small example, which geographical distinction of Switzerland. hosts
[zurich] alpha-z beta-y zeta-t [bern] alpha-b omega-t [lausanne] chi-zeta delta [geneva] alpha-kappa gamma [deutschschweiz:children] zurich bern [romandie:children] lausanne geneva
You can address all servers in the french speaking swiss (romandie). This command would reload the monit daemon on all hosts in Lausanne and Geneva.
ansible romandie -i hosts -m shell -a "sudo monit reload"