Add metrics collection exercises

[calebhailey]

Suggested Improvement

Metrics collection exercises are currently marked as "todo" in lessons 4 and 8. Let's add examples for each reference architecture (influxdb, sumologic, elasticsearch, prometheus, etc).

Applicable Lessons

• Lesson 01 completed or in-progress
• Lesson 02 completed or in-progress
• Lesson 03 completed or in-progress
• Lesson 04 completed or in-progress
• Lesson 05 completed or in-progress
• Lesson 06 completed or in-progress
• Lesson 07 completed or in-progress
• Lesson 08 completed or in-progress
• Lesson 09 completed or in-progress
• Lesson 10 completed or in-progress
• Lesson 11 completed or in-progress
• Lesson 12 completed or in-progress
• Lesson 13 completed or in-progress
• Lesson 14 completed or in-progress
• Lesson 15 completed or in-progress
• Lesson 16 completed or in-progress

[thoward]

Not sure if this can be closed or not. We include metrics collection in Lesson 8, but it doesn't cover the range you've described in this issue (e.g. doesn't cover influx/ES/prometheus, just sumologic). Should we file separate issues for those data platforms or just stick with a single platform in the workshop?