[rabbitmq-discuss] Clustering - just can't get it going
Derek Wyatt
derek at derekwyatt.org
Wed Sep 25 14:50:16 BST 2013
Hi,
I've seen a number of people failing to get clustering running and,
unfortunately, I can't get it going either. Here's the summary of what
I've got:
- Two nodes - RMQ1 and RMQ2
- I can ping RMQ1 from RMQ2, and vice versa
- I can telnet from RMQ1 to RMQ2:epmd, and vice versa
- I can telnet from RMQ1 to RMQ2:amqp, and vice versa
- The cookie file is identical, as is clear from the startup INFO
My goal is to have RMQ2 join RMQ1 in a cluster.
The servers are started using the init script in Ubuntu (i.e. service
rabbitmq-server start). This is different than the script at
http://www.rabbitmq.com/clustering.html, which says to start with
"rabbitmq-server -detached". I've tried that and it doesn't seem to make
any difference so I always use the init script instead.
So, the script says to stop the RMQ2 server and then join the cluster. The
following transcript shows how well all this goes:
02:~$ sudo rabbitmqctl stop_app
Stopping node 'rabbit at RMQ2' ...
...done.
02:~$ sudo rabbitmqctl join_cluster --ram rabbit at RMQ1
Clustering node 'rabbit at RMQ2' with 'rabbit at RMQ1' ...
Error: {cannot_discover_cluster,"The nodes provided are either offline or
not running"}
However, as I said above, telnetting to the ports works just fine:
02:~$ telnet RMQ1 epmd
Trying <ip address>...
Connected to RMQ1
Escape character is '^]'.
booger!
Connection closed by foreign host.
02:~$ telnet RMQ1 amqp
Trying <ip address>...
Connected to RMQ1
Escape character is '^]'.
booger!
AMQP Connection closed by foreign host.
I'm stuck for what else to test. Does anyone know how to troubleshoot this
thing further?
Thanks,
Derek
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