Merge branch 'main' into feature/roundingcensus_integration

Dockerfile

@@ -2,7 +2,7 @@ FROM golang:1.21.1 AS builder
 
 WORKDIR /src
 COPY . .
-RUN go build -o=census3 -ldflags="-s -w" ./cmd/census3
+RUN go build -o=census3 -ldflags="-s -w  -X=github.com/vocdoni/census3/internal.Version=$(git describe --always --tags --dirty --match='v[0-9]*')" ./cmd/census3
 
 FROM debian:bookworm-slim
 

api/api.go

@@ -67,6 +67,9 @@ func Init(db *db.DB, conf Census3APIConf) (*census3API, error) {
 	if err = r.Init(conf.Hostname, conf.Port); err != nil {
 		return nil, err
 	}
+	// expose metrics endpoint
+	r.ExposePrometheusEndpoint("/metrics")
+
 	// init API using the http router created
 	if newAPI.endpoint, err = api.NewAPI(&r, "/api"); err != nil {
 		return nil, err

cmd/census3/main.go

@@ -2,17 +2,20 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"os/signal"
 	"strings"
 	"syscall"
 	"time"
 
+	"github.com/VictoriaMetrics/metrics"
 	"github.com/google/uuid"
 	flag "github.com/spf13/pflag"
 	"github.com/spf13/viper"
 	"github.com/vocdoni/census3/api"
 	"github.com/vocdoni/census3/db"
+	"github.com/vocdoni/census3/internal"
 	"github.com/vocdoni/census3/service"
 	"github.com/vocdoni/census3/service/poap"
 	"github.com/vocdoni/census3/service/web3"
@@ -155,6 +158,9 @@ func main() {
 	ctx, cancel := context.WithCancel(context.Background())
 	go hc.Start(ctx)
 
+	metrics.NewCounter(fmt.Sprintf("census3_info{version=%q}",
+		internal.Version)).Set(1)
+
 	// wait for SIGTERM
 	c := make(chan os.Signal, 1)
 	signal.Notify(c, os.Interrupt, syscall.SIGTERM)

go.mod

@@ -3,6 +3,7 @@ module github.com/vocdoni/census3
 go 1.21.1
 
 require (
+	github.com/VictoriaMetrics/metrics v1.24.0
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.0.2
 	github.com/ethereum/go-ethereum v1.13.4
 	github.com/frankban/quicktest v1.14.6
@@ -25,7 +26,6 @@ require (
 	github.com/DataDog/zstd v1.5.2 // indirect
 	github.com/Jorropo/jsync v1.0.1 // indirect
 	github.com/Microsoft/go-winio v0.6.1 // indirect
-	github.com/VictoriaMetrics/metrics v1.24.0 // indirect
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
 	github.com/alexbrainman/goissue34681 v0.0.0-20191006012335-3fc7a47baff5 // indirect
 	github.com/benbjohnson/clock v1.3.5 // indirect

internal/version.go

@@ -0,0 +1,5 @@
+package internal
+
+// Version will be replaced by a human-readable version from git in Docker
+// and release builds.
+var Version = "devel"