I think you answered your own question. starting with v10.5 - EDC no longer uses hadoop for as the cluster service.
everything you need to run the cluster is provided (Nomad, MongoDB, Solr, postgres), so you do not need ambari for anything.
Thank you for your answer!
I have one more question.
I have Nomad server on a Linux machine(10.10.253.39) but this address is not accepted by informatica(as shown in the screenshot).
there is no screenprint from the previous message.
you can't use an external nomad cluster.
the for the cluster service you provide a list of cluster and processing nodes & it will install all of the services.
for those nodes, you need to provide the fqdn.