problems with rabbitmq cluster across 2 ubuntu 9.04 machines

Question

I keep getting unable_to_contact_cluster_nodes error

Has anyone seen this earlier and resolved it?

I am using rabbitmq-server 1.5.4 installed using ubuntu repositories. I have a hunch that this is something to do with ufw or some other network security measure, enabled by default in ubuntu, that is preventing connections.

The machine is pingable (I made an entry in /etc/hosts file)

pgatram@mzl005:~$ ping mz005 PING mz005 (192.168.0.22) 56(84) bytes of data. 64 bytes from mz005 (192.168.0.22): icmp_seq=1 ttl=64 time=0.026 ms 64 bytes from mz005 (192.168.0.22): icmp_seq=2 ttl=64 time=0.023 ms ^C --- mz005 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.023/0.024/0.026/0.005 ms

I cant get the cluster to work

pgatram@mzl005:~$ sudo rabbitmqctl cluster rabbit@mz005 Clustering node rabbit@mzl005 with [rabbit@mz005] ... Error: {unable_to_contact_cluster_nodes,[rabbit@mz005]}

Answer 1

Hi,

Almost certainly a firewall issue. You should be able to telnet to the other host on port 5672 (or whatever you specified in /etc/default/rabbitmq). If telnet can't connect then the port isn't open. As a sanity check, try telnet to localhost on port 5672.

If you can't telnet it'll be a firewall issue.

After that it's a case of opening the port and trying again.

Chris