add build information to metrics

Signed-off-by: David Christofas <dchristofas@owncloud.com>

glauth/pkg/command/root.go

@@ -32,6 +32,7 @@ func Execute() error {
 		Flags: flagset.RootWithConfig(cfg),
 
 		Before: func(c *cli.Context) error {
+			cfg.Version = version.String
 			return ParseConfig(c, cfg)
 		},
 

glauth/pkg/command/server.go

@@ -2,6 +2,7 @@ package command
 
 import (
 	"context"
+	"github.com/owncloud/ocis/glauth/pkg/metrics"
 	"os"
 	"os/signal"
 	"strings"
@@ -134,11 +135,13 @@ func Server(cfg *config.Config) *cli.Command {
 			var (
 				gr          = run.Group{}
 				ctx, cancel = context.WithCancel(context.Background())
-				//metrics     = metrics.New()
+				metrics     = metrics.New()
 			)
 
 			defer cancel()
 
+			metrics.BuildInfo.WithLabelValues(cfg.Version).Set(1)
+
 			{
 				cfg := glauthcfg.Config{
 					LDAP: glauthcfg.LDAP{