System stats, docker stats, bulk metrics, fixes, etc

[jsiembida]

This change adds:

• Collection of system statistics
• Collection of docker container stats

Improvements:

• Bulk data transfers between components as well as in influx protocol.
• Fixes carbon client blocking startup while trying to reconnect
• Fixes StatsD @ Py3

[coveralls]

Coverage decreased (-2.7%) to 44.644% when pulling 15e3565 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-2.7%) to 44.644% when pulling 15e3565 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-2.8%) to 44.564% when pulling 7595351 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.09%) to 44.305% when pulling 24c3c74 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.3%) to 44.133% when pulling da09fb7 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.3%) to 44.133% when pulling da09fb7 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-2.9%) to 44.514% when pulling ba54cb3 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.2%) to 44.236% when pulling 2c72bc8 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[trbs]

Thanks for all your work !

Can I ask to make separate PR's for the individual improvements ? (Docker, Influxdb, etc)
That will make it a lot easier to get them merged.

Thanks !

[jsiembida]

It may be a bit difficult for me to separate those out. This comes as one stream of work since I was working on everything at the same time really. Also, some things are inherently convoluted.

I am about to introduce one compatibility breaking change, I really wanna drop statsd_legacy_namespace and just use the new naming scheme. Do you mind?

EDIT: Actually, ignore that, I think I can work around the legacy mode.

[coveralls]

Coverage decreased (-3.06%) to 44.332% when pulling a75c845 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.06%) to 44.332% when pulling a75c845 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.2%) to 44.224% when pulling d2a45b0 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.2%) to 44.224% when pulling d2a45b0 on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.6%) to 43.803% when pulling 7c1896b on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.6%) to 43.803% when pulling 7c1896b on jsiembida:docker-stats-support into a779aeb on trbs:master.

[coveralls]

Coverage decreased (-3.6%) to 43.803% when pulling 7c1896b on jsiembida:docker-stats-support into a779aeb on trbs:master.