Install 1.7.2 on EC2 - No task slots - 2019

[Jeff Crane]

When downloading the latest 1.7.2 and extracting to (a free) AMZ EC2, the 
daemon (./bin/start-cluster.sh) reports 0 task managers, 0 task slots, and 0 
avails, out of the box. All jobs fail. All ports are open to all traffic. 
Can anyone tell me what I missed?