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golang rest api with a gorilla/mux router and prometheus metrics

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#### Sample Project for a gorilla/mux based go rest API with prometheus metrics enabled and simple request logging.

[![Build Status](https://travis-ci.org/hendrikstill/go-mux.svg?branch=master)](https://travis-ci.org/hendrikstill/go-mux)

#### the main app is a sample golang application with a gorilla/mux based router.
port 8080 is used and you can build it yourself with:
`go get -d github.com/ben-st/go-mux`

***linux:***
`CGO_ENABLED=0 GOOS=linux go build -o mux`

***OSX:***
`CGO_ENABLED=0 GOOS=darwin go build -o mux`

after this you should be able to start it with:
`./mux`

and test it with
`curl localhost:8080`

or for the metrics endpoint:
`curl localhost:8080/metrics`

If you do not want to build it yourself just use docker or even more convenient docker-compose

`docker-compose up`

this will launch a stack with grafana, prometheus and the mux application

You can reach your applications under:

***grafana:***
  - localhost:3000/login
  - admin:password

***prometheus:***
  - localhost:9090

***mux:***
  - localhost:8080

If you want to check if prometheus scrapes the mux application correctly,
you can use the util/configure-grafana-datasource.sh script to configure the prometheus datasource.
After this you only have to import the dashboards in the *grafana* folder.
The mux-dashboard.json is a very basic dashboard which displays the go_threads of both prometheus and mux.

i added a simple prometheus gauge in the gauge.go file to show how to get updated metrics while the http server is running and blocking.

### Contributing

All patches are welcome!
If you find something is missing or broken send me a PR or file an issue.

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