Merge pull request #7 from vinted/feature/add_basics_prometheus_metrics

rest-dhcpd: add basic prometheus metrics

README.md

@@ -46,6 +46,7 @@ REST API supports following methods:
 ### API endpoints
 
 `/` - supports `GET` method. Displays index page.  
+`/metrics` - supports `GET` method. Displays prometheus metrics.  
 `/clients` - supports `GET` method. Lists all configured clients.  
 `/client/AA:BB:CC:DD:EE:FF` - supports:  
 		- `GET` - displays configuration of a client defined by `AA:BB:CC:DD:EE:FF` `MAC` address.  

go.mod

@@ -3,11 +3,23 @@ module github.com/vinted/rest-dhcpd
 go 1.19
 
 require github.com/krolaw/dhcp4 v0.0.0-20190909130307-a50d88189771
+
 require github.com/julienschmidt/httprouter v1.3.0
+
 require github.com/samber/lo v1.37.0
 
+require github.com/prometheus/client_golang v1.14.0
+
 require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.37.0 // indirect
+	github.com/prometheus/procfs v0.8.0 // indirect
 	golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 // indirect
 	golang.org/x/net v0.5.0 // indirect
 	golang.org/x/sys v0.4.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 )