Increase nofile limits set on Docker in some AWS images

Issue:

Older versions of AWS set an artificially low nofile limit on their VS configurations for running docker. This has caused some issues with at least one customer. There is more reading about it here:

https://github.com/awslabs/amazon-eks-ami/issues/278

Environment:

AWS, Linux

Cause:

Some AWS images have configured a very low nofile limit causing docker to run out of available open files

Resolution:

You can set the /etc/sysconfig/docker file to have a higher nolimit. We recommend at least 65000