Is there any way to configure Amazon EC2 instances to support multicast discovery needed for EhCache

Question

Is there any way to configure Amazon EC2 instances to support multicast needed for EhCache auto-discovery? (through iptables hacks etc)/

score 10 · Accepted Answer · edited Dec 07 '17 at 12:22

10

There is no multicast between EC2 instances. Amazon does not allow it.

There is a straight answer on the FAQ http://aws.amazon.com/vpc/faqs/#R4

You can submit a request to AWS, I am sure that you (we) are not alone facing a requirement to easily auto-scale an EHCache on amazon.

edited Dec 07 '17 at 12:22

juanmirocks

answered Jun 19 '11 at 19:47

Vincent Giguère

1

Broken link to terracotta – Amit Bens Jun 08 '14 at 14:40
seems that i have the same problem with digitalocean (using hazelcast instead of EHCache). But need to be confirmed. – Logemann Oct 09 '14 at 00:54
The answer is outdated, this is [now possible](https://aws.amazon.com/articles/overlay-multicast-in-amazon-virtual-private-cloud/). – gcandal Sep 02 '19 at 10:50

Steve-o · Answer 2 · 2014-06-18T01:56:24.977

4

Dependent upon kernel configuration you might be able to overlay multicast on VPN connections manually wired up between each EC2 instance:

original version:

New version for 2014:

edited Jun 18 '14 at 01:56

answered May 21 '11 at 21:06

Steve-o

score 0 · Answer 3 · answered Jun 26 '14 at 10:11

Here is a presentation about how to use JGroups-based clustering (e.g. EHCache, and JBoss AS) on AWS:

You can configure JGroups to use TCP/IP and do discovery in many different ways.

3 Answers3