Look for the host you added in the list of the resources.
egosh resource listNAME status mem swp tmp ut it pg r1m r15s r15m lshostM ok 176M 619M 4819M 1% 0 2.8 0.0 0.0 0.0 2hostC unavail 173M 635M 4800M 0% 0 0.9 0.0 1.3 0.0 1
If you can see the host name in the list of resources, that host was successfully added to the cluster.
This test detects hosts even if the host is not currently available. Some hosts make take a while to become available after they are added to the cluster.