Right now, deploy-gce-perf-cluster.py puts Ambari Server on the same 4 core VM where it puts 50 agents. Instead, we need to create a separate 16-core VM for the server without any agents.
Next, Ambari Server should be installed with MySQL database instead since it has more configuration options that the default postgres.
Further, the sorting of the VMs is not numeric since "perf-9" comes after "perf-42". The incorrect sorting means that VM #i isn't getting the agents starting with number (i-1)*50+1