How to check if an instance is running well?
Example: curl -L http://<cassandra-host>:2379/v2/keys/cassandra/<cassandra-cluster-name>/seeds
curl -L http://<cassandra-host>:2379/v2/keys/cassandra/<cassandra-cluster-name>/seeds
Example: curl -L http://127.0.0.1:2379/v2/keys/cassandra/test/seeds
curl -L http://127.0.0.1:2379/v2/keys/cassandra/test/seeds