zookeeper_exporter 
A Prometheus exporter for Zookeeper 3.4+. It send the mntr command to a Zookeeper node and converts the output to Prometheus format.
Usage
Download the latest release, pull the Docker image or follow the instructions below for building the source.
There is a -help flag for listing the available flags.
Building from source
go get -u github.com/carlpett/zookeeper_exporter and then make build.
Limitations
Due to the type of data exposed by Zookeeper's mntr command, it currently resets Zookeeper's internal statistics every time it is scraped. This makes it unsuitable for having multiple parallel scrapers.