[RFE] Enable Puma Control Server

[dmetzger57]

It would be great to pull more useful metrics off the CloudForms puma environment. This can be done using sensu if the puma control server is available.

https://github.com/puma/puma/tree/a3136985887d44c79e623b1408a41779b71d8b23#controlstatus-server

Stats and GC Stats are available: https://github.com/puma/puma/blob/master/lib/puma/app/status.rb

We are using Sensu to monitor our CloudForms deployment ~250 appliances today.
I wanted to pull more information off the Puma servers themselves to get details such as Ruby GC performance etc.

I am pulling items such as the MIQ Queue size as well as DB connections total, active, waiting.

We were going to deploy the Sensu Puma plugin which pulls all the metrics and stores into Graphite/InfluxDB: https://github.com/sensu-plugins/sensu-plugins-puma.

There is also a metrics plugin for Apache: https://github.com/sensu-plugins/sensu-plugins-apache that uses mod_status.

Adding both the puma socket and mod_status would provide any standards-complient tool such as sensu/collectd/etc to pull data from the appliance.

It would also support using this data internally to have this type of dashboard ultimately be part of the product.

[dmetzger57]

Associated BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1562543

[miq-bot]

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