[rabbitmq-discuss] Clustering - just can't get it going

[Derek Wyatt]

Thanks Jason.  The cookies are the same.  Running anything from rabbitmqctl
to the remote host fails, unfortunately.  The list_queues call fails to
connect, the same as join_cluster.

As I indicated, the telnets all work just fine, so I'm stuck for what to
diagnose next.  Any ideas would be great.


On 25 September 2013 09:57, Jason McIntosh <mcintoshj at gmail.com> wrote:

> Check your erlang cookie on both servers to make sure it matches I think
> it's in - /var/lib/rabbitmq/ - then you can use rabbitmqctl from one
> machine and see if you can connect to another to list queues.  I THINK
> that's rabbitmqctl -n <servernode> list_queues for example.  If both
> servers can talk to each other then it should be rabbitmqctl stop_app,
> join_cluster, start_app.
>
> Jason
>
>
> On Wed, Sep 25, 2013 at 8:50 AM, Derek Wyatt <derek at derekwyatt.org> wrote:
>
>> 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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>>
>>
>
>
> --
> Jason McIntosh
> http://mcintosh.poetshome.com/blog/
> 573-424-7612
>
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