[rabbitmq-discuss] configuring beam and rabbit

Thu Jul 15 18:30:17 BST 2010

Marek,

Fantastic, thank you; I was looking for the general format and
capability, I'm sure it's not perfectly formatted.  I'll be writing up
a post in the coming weeks summarizing our rabbit configuration.  For
a future release, I'd recommend:

* better documentation on rabbitmq.config
* deprecating the rabbitmq_cluster.config file in favor of a single config
* renaming rabbitmq.conf to rabbitmq.env or similar

cheers,
Aaron

On Thu, Jul 15, 2010 at 12:53 PM, Marek Majkowski <majek04 at gmail.com> wrote:
> Aaron,
>
> On Tue, Jul 13, 2010 at 17:08, Aaron Westendorf <aaron at agoragames.com> wrote:
>> I missed some changes to the rabbitmq-server script that occurred
>> sometime between 1.5.0 and 1.7.0.
>>
>> In older versions, the script included the following line at the top:
>>
>>  [ -f /etc/rabbitmq/rabbitmq.conf ] && . /etc/rabbitmq/rabbitmq.conf
>>
>> The file could be used to define any of the bash options, but
>> documentation and/or posts had suggested that this was how one would
>> disable smp, for example:
>>
>>  RABBITMQ_SERVER_ERL_ARGS="-smp disable"
>
> /etc/rabbitmq/rabbitmq.conf is still okay. Here's a partial list of supported
> parameters:
>   http://www.rabbitmq.com/install.html#install-windows-separately
>
> But please, strip the "RABBITMQ_" prefix. To disable smp
> put following settings to "/etc/rabbitmq/rabbitmq.conf":
> SERVER_START_ARGS="-smp disable"
>
>
>> This causes a lot of confusion with the new config file,
>> /etc/rabbitmq/rabbitmq.config, which seems to be the place where all
>> of the application configuration should go.
>
> Agreed, rabbitmq settings are awful.
> /etc/rabbitmq/rabbitmq.conf <- put global bash env variables here
> /etc/rabbitmq/rabbitmq.config <- erlang setup config
>
>> I feel like I've heard
>> that this includes socket buffers, but I don't recall.  The only
>> documentation I can find on the file relates to setting
>> "vm_memory_high_watermark", which seems to be specific to rabbit and
>> not the same as the old "-os_mon system_memory_high_watermark" setting
>> that was embedded in the rabbitmq-server script.  Is there a complete
>> reference on the format of this file and what options are available?
>> Can the cluster configuration be merged into this file?
>>
>> I'm an erlang noob, but have worked with rabbit enough and read
>> through the scripts to guess that the following content for
>> rabbitmq.config would work as expected:
>>
>> [
>>  {rabbit, [
>>    {vm_memory_high_watermark, 0},
>>    {cluster_config, [rabbit at host1, rabbit at host2]},
>>  ]},
>>  {kernel, [
>>    {inet_default_listen_options,
>> [{nodelay,true},{sndbuf,32768},{recbuf,32768}] },
>>    {inet_default_connect_options, [{nodelay,true}] }
>>  ]},
>>  {os_mon, [
>>    {start_cpu_sup, false},
>>  ]}
>> ].
>
> That looks okay, tough I'm not able to check if you haven't missed a
> coma or a bracket.
> But I can share my /etc/rabbitmq/rabbitmq.config:
>
> [
>                {kernel,
>                        [{inet_dist_listen_min, 50000},
>                         {inet_dist_listen_max, 60000},
>                         {inet_default_listen_options, [{nodelay,true}]},
>                         {inet_default_connect_options, [{nodelay,true}]}
>                        ]
>                },
>                {rabbit,
>                        [{vm_memory_high_watermark, 0.1}]
>                }
> ].
>
>
> Cheers,
>  Marek Majkowski
>

-- 
Aaron Westendorf
Senior Software Engineer
Agora Games
359 Broadway
Troy, NY 12180
Phone: 518.268.1000
aaron at agoragames.com
www.agoragames.com