Go Webserver with Prometheus + Grafana example

This repository will showcase on how I implement metrics "safely" by preventing high cardinality for more performant webserver

About prometheus high cardinality, read more in here:

Known upsides and downsides

• This way, we can prevent high cardinality by not sending the path values of an route (it will send /:userId instead of /isfvDGFs )
• Not found routes and panics metric are not handled, but you can make one easily by using each web framework global error handling
• As I forsee, it requires more acrobatic unit test if you want to make one (my skill issue)

Prerequisites

• Golang
• Docker
• A linux environment (WSL and Macs should be fine)

How to run

Start Prometheus server

# Prometheus will available at localhost:9090
make startProm

Start Grafana server

# Grafana will available at localhost:3000
# the default username & password are both `admin`
make startGrafana

Start Echo WebServer

# Echo webserver will available at localhost:8080
go run echoExample/main.go

Start Fiber WebServer

# Fiber webserver will available at localhost:8080
go run fiberExample/main.go