I installed RabbitMQ on Linux, it's a great piece of software.
When I run this command:
sudo rabbitmqctl status
I get a mess of output:
[{pid,18665},
{running_applications,
[{rabbitmq_management,"RabbitMQ Management Console","3.1.5"},
{rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.1.5"},
{webmachine,"webmachine","1.10.3-rmq3.1.5-gite9359c7"},
{mochiweb,"MochiMedia Web Server","2.7.0-rmq3.1.5-git680dba8"},
{rabbitmq_management_agent,"RabbitMQ Management Agent","3.1.5"},
{rabbit,"RabbitMQ","3.1.5"},
{os_mon,"CPO CXC 138 46","2.2.7"},
{inets,"INETS CXC 138 49","5.7.1"},
{xmerl,"XML parser","1.2.10"},
{mnesia,"MNESIA CXC 138 12","4.5"},
{amqp_client,"RabbitMQ AMQP Client","3.1.5"},
{sasl,"SASL CXC 138 11","2.1.10"},
{stdlib,"ERTS CXC 138 10","1.17.5"},
{kernel,"ERTS CXC 138 10","2.14.5"}]},
{os,{unix,linux}},
{erlang_version,
"Erlang R14B04 (erts-5.8.5) [source] [64-bit] [rq:1] [async-threads:30] [kernel-poll:true]\n"},
{memory,
[{total,179426464},
{connection_procs,300224},
{queue_procs,14434024},
{plugins,474968},
{other_proc,9607952},
{mnesia,89264},
{mgmt_db,1539936},
{msg_index,85175152},
{other_ets,29060560},
{binary,18243208},
{code,17504466},
{atom,1602617},
{other_system,1394093}]},
{vm_memory_high_watermark,0.4},
{vm_memory_limit,1522479923},
{disk_free_limit,1000000000},
{disk_free,58396659712},
{file_descriptors,
[{total_limit,924},{total_used,17},{sockets_limit,829},{sockets_used,4}]},
{processes,[{limit,1048576},{used,233}]},
{run_queue,0},
{uptime,5169640}]
It looks like JSON, but it's not.
What data format is this? And how did you find out?
Closest thing I can find is this: http://erlang.org/doc/man/yecc.html
rabbitmqctl has a --formatter flag to request JSON formatted output optionally available. For instance:
sudo rabbitmqctl status --formatter json | jq .disk_free_limit
50000000