[ale] SNMP oid for file descriptors

[Matty]

> On 2018-08-07 07:00, Todor Fassl via Ale wrote:
>> Well, I am not too worried about being able to calculate it. What I
>> cannot figure out is how to get to the numbers remotely.

An alternate approach (and given that you use nagios this may not be
suited for you) is to use prometheus along with the node_exporter. It
has two useful file descriptor metrics:

node_filefd_allocated
node_filefd_maximum

We graph both of these with Grafana and use the prometheus alert
manager to notify us of issues. Thought I would pass this on.

Thanks,
- Ryan
https://prefetch.net