POC - from Cloudwatch to GitLab prometheus

Problem to solve

As a developer / devops engineer, in order to monitor my deployments, I'd like to see my AWS Lambda request numbers and error rates under GitLab.

Intended users

• Sasha (Software Developer)
• Devon (DevOps Engineer)

Definition of Done

Delivery specifications:

• 1 Lambda function that echos output
• 1 Lambda function that throws an error
• A GitLab Prometheus instance pointing at the Cloudwatch data for the Lambda function
• An EC2 instance running https://github.com/prometheus/cloudwatch_exporter to export the CloudWatch data
• A README documenting the setup process for the above
• Presentation of findings at team meeting

Recommended Reading

• https://docs.gitlab.com/ee/user/project/integrations/prometheus.html#prometheus-integration
• https://github.com/prometheus/cloudwatch_exporter

Questions

As it's a POC, please explore the following questions:

• where could a GitLab.com managed project run the cloudwatch exporter? what do we want to develop support for?
• where could an on-prem GitLab project run the cloudwatch exporter? what do we want to develop support for?
• what should be the steps next development steps?
• what settings, configurations are needed to get the Number of requests and Number of errors shown under GitLab?