It installs Zabbix from source packages and maintains user parameters via resources.
The zabbix-agent recipe derives its proxy from nodes in the same environment with
node[zabbix][is_proxy] set to true
This cookbook is managed with continuous integration for the Master branch.
On commit merge to master, CircleCI checks out the code, runs the test suite, if it passes, it retags the code on the new version number (managed by git tags) and uploads it to the chef server. It does not promote in any environment