As
@Fawze mentioned, any role can be moved. From the info provide it looks like you are running 5 worker nodes and 1 master. Depending on the hardware you can make one or two of those workers into Masters; otherwise moving master roles onto worker nodes will potentially cause issues.
Some tips for moving, if the role connects to a backend DB, like the Hive Metastore, then you need to update the DB user account to reflect it running from the new hosts. Some other roles are tricky, like the Namenode, as you would need to migrate the metadata.
The two candidates to convert to masters from workers would be the two that just have the Datanode role on them. You can just do one if you don't need production level resiliency and redundancy in the master services.
First, remove the Nodemanager, HBase Regionserver, and Impala Daemon, Solr server role from the current master (the one with 25 roles).
Those are all worker roles. I would move the ResourceMananger, Spark History, Impala Catalog, Impala Statestore, and Secondary Namenode. The last one is the only tricky one and it should be fine as setting up a new one should sync from the Namenode.
I also recommend moving the Cloudera Manager roles off to a completely different server, possible a VM. It doesn't need to be on the cluster, is using up valuable resources, and can live in a VM. You will need to update all DB accounts related to them.
That is a start, we could go further but that should be enough to give you some breathing room.
Good luck.
