Error Creating cluster in RabbitMQ on EC2

I want to create a cluster of RabbitMQ on EC2. I have created an AMI of Ubantu and install the rabbitmq-server-2.3.1 on it. I have also installed the management plugins for GUI. For cluster purpose I have also copied the .erlang.cookie file in another node. My ploblem is when I am trying to connect with another node it gives me following error:

Error: {failed_to_cluster_with,['rabbit@ip-10-58-54-170'], "Mnesia could not co开发者_Python百科nnect to some nodes."}

Anybody has any idea why it is happening?

There are a few usual causes for "Mnesia could not connect to some nodes":

• the nodes cannot actually communicate with each other (can you ping the other hosts?),
• Erlang restrictions prevent you from naming nodes in certain ways (e.g. FQDMs are not supported, the node name must be a single word) so you usually have to add the node addresses to your hosts file,
• the two nodes have different cookies (not the case here),
• Rabbit is not running on the remote node.

To quickly diagnose the issue:

• check connectivity:

  ping other_node

• check that Erlang can connect to other_node:

  erl -sname my_node -remsh rabbit@other_node

• check that Rabbit is running on the remote node:

  rabbitmqctl -n other_node status

Quite a few people have managed to get RabbitMQ clusters working on EC2, so it's certainly possible.

If you need more help, a great place to ask is the RabbitMQ Discuss mailing list. The developers make a point of answering the questions asked.

In my case under Ubuntu 11.10 it helped to

#rabbitmqctl cluster MASTER SLAVE
#rabbitmqctl start_app

before I always got this error message...