[rabbitmq-discuss] Problem with using rabbitmqctl on EC2

Tue Feb 28 11:06:40 GMT 2012

On Tue, Feb 28, 2012 at 00:20, Codevally <codevally at gmail.com> wrote:
> Both ping `hostname` and ping `hostname -f` is working fine.
>
> The latest issue is when I try to get the status using rabbitmqctl
> (rabbitmq status) it says
>
> ec2test2:/app/rabbitmq/sbin # sh rabbitmqctl status
> Status of node rabbit at ec2test2 ...
>
> =ERROR REPORT==== 28-Feb-2012::00:14:34 ===
> ** System running to use fully qualified hostnames **
> ** Hostname ec2test2 is illegal **
> Error: unable to connect to node rabbit at ec2test2: nodedown
> diagnostics:
> - nodes and their ports on ec2test2: [{rabbit,30000},
> {rabbitmqctl12151,54167}]
> - current node: 'rabbitmqctl12151 at ec2test2.xx-
> xx-1.compute.amazonaws.com'

See? Your system is clearly confused if hostname
is ec2test2.xx-xx-1.compute.amazonaws.com or ec2test2.

Take a look at http://www.rabbitmq.com/ec2.html
the "Issues with hostname" section.

Marek

> - current node home dir: /root
> - current node cookie hash: 4lZvwoYL5ZJbkEiBx9CgDB==
>
> But if I specify the node using -n (rabbitmqctl -n ec2test2 status)
> and it says
>
> ec2test2:/app/rabbitmq/sbin # sh rabbitmqctl -n ec2test2 status
> Status of node 'ec2test2 at ec2test2.xx-xx-1.compute.amazonaws.com' ...
> Error: unable to connect to node 'ec2test2 at ec2test2.xx-
> xx-1.compute.amazonaws.com': nodedown
> diagnostics:
> - nodes and their ports on ec2test2.xx-xx-1.compute.amazonaws.com:
> [{rabbit,
>
> 30000},
>
> {rabbitmqctl12163,
>
> 56206}]
> - current node: 'rabbitmqctl12163 at ec2test2.xx-
> xx-1.compute.amazonaws.com'
> - current node home dir: /root
> - current node cookie hash: 4lZvwoYL5ZJbkEiBx9CgDB==
>
> Any idea??
>
> On Feb 27, 11:25 pm, Marek Majkowski <maje... at gmail.com> wrote:
>> On Mon, Feb 27, 2012 at 03:00, Codevally <codeva... at gmail.com> wrote:
>> > I have installed RabbitMQ 2.7.1 on EC2 (host name is ec2test2) and
>> > server getting started without any issue.
>>
>> > AMQP 0-9-1 / 0-9 / 0-8
>> > Copyright (C) 2007-2011 VMware, Inc.
>> > Licensed under the MPL.  Seehttp://www.rabbitmq.com/
>>
>> > node           : rabbit at ec2test2
>> > app descriptor : /app/rabbitmq_server-2.7.1/sbin/../ebin/rabbit.app
>> > home dir       : /root
>> > config file(s) : (none)
>> > cookie hash    : 4lZvwoYL5ZJbkEiBx9CgDA==
>> > log            : /var/log/rabbitmq/rab... at ec2test2.log
>> > sasl log       : /var/log/rabbitmq/rab... at ec2test2-sasl.log
>> > database dir   : /app/rabbitmq-config/lib/rabbitmq/mnesia/
>> > rabbit at ec2test2
>> > erlang version : 5.9
>>
>> > But when I try to use rabbitmqctl, I am getting the below error.
>>
>> > ec2test2:/app/rabbitmq/sbin # sh rabbitmqctl
>> > {error_logger,{{2012,2,27},{2,55,8}},"Can't set long node name!
>> > \nPlease check your configuration\n",[]}
>> > {error_logger,{{2012,2,27},{2,55,8}},crash_report,[[{initial_call,
>> > {net_kernel,init,['Argument__1']}},{pid,<0.20.0>},{registered_name,[]},
>> > {error_info,{exit,{error,badarg},[{gen_server,init_it,6,
>> > [{file,"gen_server.erl"},{line,313}]},{proc_lib,init_p_do_apply,3,
>> > [{file,"proc_lib.erl"},{line,227}]}]}},{ancestors,
>> > [net_sup,kernel_sup,<0.9.0>]},{messages,[]},{links,[<0.17.0>]},
>> > {dictionary,[{longnames,true}]},{trap_exit,true},{status,running},
>> > {heap_size,6765},{stack_size,24},{reductions,2361}],[]]}
>>
>> > Host name is correctly configured and it displays:
>> > ec2test2:/app/rabbitmq/sbin # hostname
>> > ec2test2
>> > ec2test2:/app/rabbitmq/sbin #
>>
>> > Could someone please explain this erroneous behavior?
>>
>> Google suggests:
>>  https://groups.google.com/group/erlang-programming/msg/72f4dc5311729eb2
>>
>> > A little more experimentation revealed that the problem was that the
>> > system returned no FQDN for itself, as indicated for example by
>> > 'hostname -f'. A little /etc/hosts manipulation fixed that, and all
>> > was well.
>>
>> Basically, make sure that this works fine:
>>   ping `hostname`
>>   ping `hostname -f`
>>
>> Cheers,
>>     Marek
>> _______________________________________________
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