[AIRAVATA-2373] Increase open file descriptor limits for RabbitMQ server

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: GFac
• Assignee: Marcus Christie
• Reporter: Marcus Christie
• Created: 24/Apr/17 14:55
• Updated: 25/Apr/17 12:53

Description

Ran into a problem on gw56 where GFac wasn't able to make a connection to RabbitMQ because RabbitMQ hit the open file descriptor limit of 1024.

Using http://clouddoc.stratus.com/1.5.1.0/en-us/Content/Help/P03_Support/C02_InstallGuide/C05_OpenStackInstall/T_RabbitMQLimits.htm as a guide I created a file called /etc/default/rabbitmq-server on gw56 with the following contents:

ulimit -n 65536

Then I restarted RabbitMQ. I verified the new limit:

[root@gw56 ~]# grep -e Limit -e files /proc/$(cat /var/run/rabbitmq/pid)/limits
Limit                     Soft Limit           Hard Limit           Units     
Max open files            65536                65536                files     

Then I restarted GFac and it was able to connect to the process_launch queue again.

It would be good to research if this is the best way to increase open file limits and then get it into the Ansible scripts.