[rabbitmq-discuss] rabbitmqadmin and ability to read configuration files

[Massimo Paladin]

Hello,

with the intention of using rabbitmqadmin to automate rabbitmq configuration
we had to improve rabbitmqadmin to be able to read configuration files.

Such requirement was needed for different reasons:
- security: it is not very nice to launch commands with passwords in the
command line
- code duplication: previous point would have required to hard-code
username and password
  in rabbitmqadmin which is something we would like to avoid
- it is nice to have a single configuration file containing configuration
for multiple hosts
  and be able to recall that host from the command line

For such reasons I made some small changes to rabbitmqadmin to make it work
with configuration files.
The script doesn't brake backward compatibility.

The modified script:
https://github.com/mpaladin/rabbitmq-custom/blob/master/rabbitmqadmin/rabbitmqadmin

An example of configuration file:
https://github.com/mpaladin/rabbitmq-custom/blob/master/rabbitmqadmin/rabbitmqadmin.conf.example

To profit from the configuration file just run:
# rabbitmqadmin -c rabbitmqadmin.conf.example -N host_normal ...

Hopefully someone will benefit from this change and it would be nice to see
it in the next release.

The changes reflect this behavior:
- there are hard-coded default values (like before)
- eventual configuration file setting override the defaults
- command line override the result of the previous steps

Cheers,
---
Massimo Paladin

email: massimo.paladin at gmail.com
website: http://www.mpaladin.com
flickr's page: http://flickr.com/photos/massimop
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