assign services to hosts

Hi, I have a small cluster with 1 host as ambari server, 1 host as namenode, 1 host as resourcemanager and 1 host as hbasemaster.
I also have 3 hosts for slaves-workers.
I am only sure for slaves-workers which have to assign nodemanager,datanode hbase regionserver
All other services as metrics collector, scoop, zookeeper ( I think goes to hbasemaster), flum, kafka and all others where are supposed to be assigned, to which hosts and how many times?
Thank you.