External RabbitMQ installation and configuration

Install the Epel release.

yum -y install epel-release

Use the following command to install RabbitMQ:

yum -y install rabbitmq-server 

RabbitMQ is used for messaging between the Python services and the CORE services. RabbitMQ is required for the other services installation.

Add a service to autoload and launch service

systemctl start rabbitmq-server

systemctl enable rabbitmq-server

systemctl status rabbitmq-server

Create a user "luna" with a password "luna"

rabbitmqctl add_user luna luna

Assign extended rights to the user (set_permissions [-p <vhostpath>] <user> <conf> <write> <read>)

rabbitmqctl set_permissions -p / luna ".*" ".*" ".*"

Set the user as administrator (set_user_tags )

rabbitmqctl set_user_tags luna administrator

Activate control module for changing message broker configuration

rabbitmq-plugins enable rabbitmq_management

systemctl restart rabbitmq-server 

Get access to the utility rabbitmqadmin

find /var/lib/rabbitmq/ -name 'rabbitmqadmin' -exec chmod 0777 {} \;

Add a path to the rabbitmqadmin file to the environment variable so that the system could find and execute the rabbitmqadmin command

PATH="$PATH:/var/lib/rabbitmq/mnesia/rabbit@`hostname -s`-plugins-expand/rabbitmq_management-`rpm -qa | grep rabbitmq | cut -d - -f 3`/priv/www/cli/"

Create exchanges for service communication and add queues for workers requests

rabbitmqadmin -u luna -p luna declare exchange name=luna.match type=direct

rabbitmqadmin -u luna -p luna declare queue name=matcher durable=false auto_delete=true

Turn off the configuration module and restart the service

rabbitmq-plugins disable rabbitmq_management

systemctl restart rabbitmq-server

The message queue configuration is not described in this document.