The History of Metrics According to Me

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The History of Metrics According to Me Stephen Day Docker, Inc. Docker Meetup, SF December 2016 v1

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Stephen Day Docker, Inc. [email protected] github.com/stevvooe @stevvooe

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Metrics Why?

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The Early Years

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5 Titration By UCL - Flickr, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=45263025

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Music

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Electrical Engineering CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=392484

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Microcontrollers

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Human Powered Submarine

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Graphs

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Software Engineering

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Software Engineering is way behind! Sort of. See http://www.itl.nist.gov/div898/handbook/ for an example

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13 Observability and Controllability The Problem Low Observability High Observability Guessing Informed

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Models INFO[0012] response completed go.version=go1.6.3 http.request.host=localhost:5001 http.request.id=4db26096-a417-48e8-a759-ddd8ea66c3a0 http.request.method=GET http.request.remoteaddr=172.17.0.1:57406 http.request.uri=/v2/ http.request.useragent=curl/7.49.1 http.response.contenttype=application/json; charset=utf-8 http.response.duration=5.4388ms http.response.status=200 http.response.written=2 instance.id=7926875b-d3fb-41e4-bd75-2370a3e8a03c version=v2.5.1 Record-based

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Models Sample-based t

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Why aren’t metrics built into everything?

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Excuses!

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Why aren’t metrics a part of Docker?

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The Goal

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Prometheus https://prometheus.io/

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Types of Metrics - Counters: cumulative number that only increases - Gauges: value that can go up or down - Summary/Histogram: Sample of observations https://prometheus.io/docs/concepts/metric_types/

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Format

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Configuration

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Architecture

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Demo

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What’s next? So much.

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Road Map https://github.com/docker/docker/issues/27307

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- For Contributors and Maintainers to better understand performance - For Users to better understand behavior of the daemon in their infrastructure - Implemented in 1.13 Docker Engine Metrics

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Externally Observable Metrics - CPU, memory usage, etc. - Replaces docker stats

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Integrated Target Discovery - Prometheus automatically discover engine and container metric targets

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Application Metrics - Directly proxy your metrics out of the Docker daemon - Leverage built in integrated target discovery

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THANK YOU