The world out there is neither perfect nor uniform, and that’s good as it is. You’re using VMware, but also running KVM. A little bit of AWS is a must, and something has been deployed to Azure. Evaluation projects for Mesos/Marathon and Kubernetes are on the run, some of them already running in production. A lot of information is in your Active Directory, but some departments are only half-way in.

There are many tools and possibilities available in the Icinga monitoring ecosystem. It isn't just checks and notifications anymore. Visualize what's going on, collect metrics with Graphite, InfluxDB and Grafana. Correlate log events with monitoring alerts in Elastic/Graylog. Don't forget about ticket systems and fancy office dashboards too.