Add performance metrics to microservices

[jmarin]

• CPU
• Memory
• Number of requests
• Response Time

[hkeeler]

Is the plan to use collectd for monitoring CPU and memory? statsd does not handle this, correct? And if yes, how would that work in Docker considering you're not supposed to running background services?

I did come across docker-collectd-plugin. Its not completely clear how this work. I think you install it on each Docker host, and it uses the Docker Remote API's /stats endpoint to get the each containers CPU, memory, etc. This feels a bit awkward, though, and doesn't really seem like how collectd is intended to be used.

I also came across this post where someone had created a separate container for monitoring all the other containers on a given host. It requires that container having access to the host's docker pid. Not sure we want to go this route either, but interesting to see how others are doing Docker monitoring:

• https://forums.docker.com/t/how-do-i-run-docker-from-inside-docker/818/6

[hkeeler]

Scratch that about collectd. Google's cAdvisor definitely seems like the way to go. I was able to get it up and running and reporting Docker stats super easily. In addition, it can pipe directly to InfluxDB.

Check out How to Setup Docker Monitoring. Seems like a good writeup on glueing cAdvisor, InfluxDB, and Grafana together.

[hkeeler]

Also, I've added cAdvisor to the Docker Compose setup. PR coming soon...