NSClient++ 0.5.0, REST API and Icinga 2 integration

Michael Medin released NSClient++ 0.5.0 this week. We’re of course considering to update the bundled NSClient++ installer inside the Windows package.
First things first – the NSClient++ 0.5.0 Changelog mentions breaking changes, so we’ll need to test the ITL CheckCommands still working prior to the next Icinga 2 release (follow #12733). In case you want to help test yourself – you can safely upgrade the NSClient++ application in Windows yourself and fire your Icinga 2 checks against it (just install the new 0.5.0 package).
One cool thing to note about NSClient++ 0.5.0 – it comes with its own web server which also provides a REST API. That could introduce a solution for querying metrics via REST API which require rate calculation (CPU) from a running nscp service. This could be easily integrated into a native Icinga 2 client check plugin then. Let’s just try this out on my Windows 10 VM! 🙂