lifecycle: cleanup prometheus (#2972)

* remove high cardinality labels

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* retry worker number for prometheus multiprocess id

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* revert to pid, use subdirectories

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* cleanup more

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* use worker id based off of https://github.com/benoitc/gunicorn/issues/1352

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* fix missing app label

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* tests/e2e: remove static names

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

* fix

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/outpost/ldap/search.go

@@ -12,20 +12,17 @@ import (
 	log "github.com/sirupsen/logrus"
 	"goauthentik.io/internal/outpost/ldap/metrics"
 	"goauthentik.io/internal/outpost/ldap/search"
-	"goauthentik.io/internal/utils"
 )
 
 func (ls *LDAPServer) Search(bindDN string, searchReq ldap.SearchRequest, conn net.Conn) (ldap.ServerSearchResult, error) {
 	req, span := search.NewRequest(bindDN, searchReq, conn)
-
+	selectedApp := ""
 	defer func() {
 		span.Finish()
 		metrics.Requests.With(prometheus.Labels{
 			"outpost_name": ls.ac.Outpost.Name,
 			"type":         "search",
-			"filter":       req.Filter,
-			"dn":           req.BindDN,
-			"client":       utils.GetIP(conn.RemoteAddr()),
+			"app":          selectedApp,
 		}).Observe(float64(span.EndTime.Sub(span.StartTime)))
 		req.Log().WithField("took-ms", span.EndTime.Sub(span.StartTime).Milliseconds()).Info("Search request")
 	}()
@@ -50,6 +47,7 @@ func (ls *LDAPServer) Search(bindDN string, searchReq ldap.SearchRequest, conn n
 	for _, provider := range ls.providers {
 		providerBase, _ := goldap.ParseDN(strings.ToLower(provider.BaseDN))
 		if providerBase.AncestorOf(bd) || providerBase.Equal(bd) {
+			selectedApp = provider.GetAppSlug()
 			return provider.searcher.Search(req)
 		}
 	}