Hazelcast supports EC2 Auto Discovery as of 1.9.4. It is useful when you don't want or can't provide the list of possible IP addresses. Here is a sample configuration: Disable join over multicast and tcp/ip and enable aws. Also provide the credentials. The aws tag accepts an attribute called "conn-timeout-seconds". The default value is 5. Increasing this value is recommended if you have many IP's listed and members can not properly build up the cluster.
<join> <multicast enabled="false"> <multicast-group>18.104.22.168</multicast-group> <multicast-port>54327</multicast-port> </multicast> <tcp-ip enabled="false"> <interface>192.168.1.2</interface> </tcp-ip> <aws enabled="true"> <access-key>my-access-key</access-key> <secret-key>my-secret-key</secret-key> <region>us-west-1</region> <!-- optional, default is us-east-1 --> <security-group-name>hazelcast-sg</security-group-name> <!-- optional --> <tag-key>type</tag-key> <!-- optional --> <tag-value>hz-nodes</tag-value> <!-- optional --> </aws> </join>
You need to add hazelcast-cloud.jar dependency into your project. Note that it is also bundled inside hazelcast-all.jar. hazelcast-cloud module doesn't depend on any other third party modules.