Microsoft has transformed VSTS into Azure DevOps. See what that means for your work, what cloud support is being offered, and some sample projects to get you started.
Here is a tutorial on how to use NiFi 1.0.0's zero-master clustering that uses Zookeeper so that there is never an issue of a cluster dying because of one master node going down.
Look at containerizing a Spring Data Cassandra Application. More specifically, how to put a Spring application that connects to a Cassandra database into containers.