Does definitions.json file overwrites rabbitmq.config?

[eswar472]

I have a user defined in /etc/rabbitmq/rabbitmq.config as below

      {default_vhost,       <<"/">>},

      {default_user,        <<"guest">>},

      {default_pass,        <<"guest">>},

      {default_permissions, [<<".*">>, <<".*">>, <<".*">>]},

and at the end of config file, I have 

  { rabbitmq_management, [

      {load_definitions, "/etc/rabbitmq/definitions.json"}

    ]

  }

Content of my definitions.json file is 

{

    "rabbit_version": "3.6.5",

    "vhosts":[

        {"name":"/"}

    ],

    "policies": [{"vhost":"/", "name":"clickstream","pattern":"^OFC_CLICKSTREAM_PACKETIN_EXCHG$","apply-to":"all","definition":{"shards-per-node":4},"priority":0}]

}

After this if I execute "rabbitmqctl list_users",  its not displaying any users. But if I execute "rabbitmqctl environment" and check, it has below fields.

      {default_permissions,[<<".*">>,<<".*">>,<<".*">>]},

      {default_user,<<"guest">>},

An I verified I am not able to connect to RabbitMQ until I create "guest" user again using rabbitmqctl.

Can anyone let me know is it known that definitions.json overwrites rabbitmq.config? If yes, how can I  create policy at startup without affecting other configuration?

Thank you,

Eshwar.

[Michael Klishin]

Definitions are orthogonal to configuration files. Default user is created on first boot

if the database isn't empty. I highly recommend adding all pre-configured users to the definitions file

if they are critically important.

Or don't rely on guest/guest, which can connect only from localhost by default.

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MK

Staff Software Engineer, Pivotal/RabbitMQ

[eswar472]

Hi MK,

It worked.

Thank you,

Eshwar.

[Vincenzo De Naro Papa]

Hello Michael

Definitions are orthogonal to configuration files. Default user is created on first boot

if the database isn't empty.

So do you mean that default user and vhost are created if database already exists? 

I'm trying to run rabbitmq 3.7 container with management plugin and add a definitions.json file to define some policies (I need mirrored queues for some queues).
The problem is if I use a definitions.json file with only the "policies" statements, I get the

{error,<<"Please create virtual host \"\" prior to importing definitions.">>}

If I use a file with vhosts and policies sections, container starts but no default user created (I'm using environment variables to set default user and password).

From the logs, it seems database is not initialized if definitions.file exist and it's not empty. So more than orthogonal, it seems what is defined in definitions.json has precedence of rabbitmq.conf or env variables and it prevents to initialize the database with default values.

Am I missing something?

Thanks

Vincenzo

[Michael Klishin]

> So do you mean that default user and vhost are created if database already exists?

Yes but the default virtual host creation (seed) happens only once and the default virtual host name can be anything, not just "/".

Your definition file can assume that the "/" virtual host exists  (e.g. there are queues to import in it) but that's  not necessarily the case.

I'd double check  that part (`rabbitmqctl list_vhosts` will provide some useful information).

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