fix comments

Signed-off-by: Yijie Qin <qinyijie@amazon.com>

Author: qinxx108

pkg/alertmanager/alertmanager_metrics_test.go

@@ -213,14 +213,14 @@ func TestAlertmanagerMetricsStore(t *testing.T) {
 
 		# HELP cortex_alertmanager_partial_state_merges_failed_total Number of times we have failed to merge a partial state received for a key.
 		# TYPE cortex_alertmanager_partial_state_merges_failed_total counter
-		cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user1"} 2
-		cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user2"} 20
-		cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user3"} 200
+		cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user1"} 2
+		cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user2"} 20
+		cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user3"} 200
 		# HELP cortex_alertmanager_partial_state_merges_total Number of times we have received a partial state to merge for a key.
 		# TYPE cortex_alertmanager_partial_state_merges_total counter
-		cortex_alertmanager_partial_state_merges_total{key="nil",user="user1"} 3
-		cortex_alertmanager_partial_state_merges_total{key="nil",user="user2"} 30
-		cortex_alertmanager_partial_state_merges_total{key="nil",user="user3"} 300
+		cortex_alertmanager_partial_state_merges_total{key="nfl",user="user1"} 3
+		cortex_alertmanager_partial_state_merges_total{key="nfl",user="user2"} 30
+		cortex_alertmanager_partial_state_merges_total{key="nfl",user="user3"} 300
 
 		# HELP cortex_alertmanager_silences How many silences by state.
 		# TYPE cortex_alertmanager_silences gauge
@@ -519,14 +519,14 @@ func TestAlertmanagerMetricsRemoval(t *testing.T) {
 
         	            # HELP cortex_alertmanager_partial_state_merges_failed_total Number of times we have failed to merge a partial state received for a key.
         	            # TYPE cortex_alertmanager_partial_state_merges_failed_total counter
-        	            cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user1"} 2
-        	            cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user2"} 20
-        	            cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user3"} 200
+        	            cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user1"} 2
+        	            cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user2"} 20
+        	            cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user3"} 200
         	            # HELP cortex_alertmanager_partial_state_merges_total Number of times we have received a partial state to merge for a key.
         	            # TYPE cortex_alertmanager_partial_state_merges_total counter
-        	            cortex_alertmanager_partial_state_merges_total{key="nil",user="user1"} 3
-        	            cortex_alertmanager_partial_state_merges_total{key="nil",user="user2"} 30
-        	            cortex_alertmanager_partial_state_merges_total{key="nil",user="user3"} 300
+        	            cortex_alertmanager_partial_state_merges_total{key="nfl",user="user1"} 3
+        	            cortex_alertmanager_partial_state_merges_total{key="nfl",user="user2"} 30
+        	            cortex_alertmanager_partial_state_merges_total{key="nfl",user="user3"} 300
 
         	            # HELP cortex_alertmanager_silences How many silences by state.
         	            # TYPE cortex_alertmanager_silences gauge
@@ -782,12 +782,12 @@ func TestAlertmanagerMetricsRemoval(t *testing.T) {
 
     		# HELP cortex_alertmanager_partial_state_merges_failed_total Number of times we have failed to merge a partial state received for a key.
     		# TYPE cortex_alertmanager_partial_state_merges_failed_total counter
-    		cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user1"} 2
-    		cortex_alertmanager_partial_state_merges_failed_total{key="nil",user="user2"} 20
+    		cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user1"} 2
+    		cortex_alertmanager_partial_state_merges_failed_total{key="nfl",user="user2"} 20
     		# HELP cortex_alertmanager_partial_state_merges_total Number of times we have received a partial state to merge for a key.
     		# TYPE cortex_alertmanager_partial_state_merges_total counter
-    		cortex_alertmanager_partial_state_merges_total{key="nil",user="user1"} 3
-    		cortex_alertmanager_partial_state_merges_total{key="nil",user="user2"} 30
+    		cortex_alertmanager_partial_state_merges_total{key="nfl",user="user1"} 3
+    		cortex_alertmanager_partial_state_merges_total{key="nfl",user="user2"} 30
 
     		# HELP cortex_alertmanager_silences How many silences by state.
     		# TYPE cortex_alertmanager_silences gauge
@@ -930,8 +930,8 @@ func populateAlertmanager(base float64) *prometheus.Registry {
 	lm.insertFailures.Add(7 * base)
 
 	sr := newStateReplicationMetrics(reg)
-	sr.partialStateMergesFailed.WithLabelValues("nil").Add(base * 2)
-	sr.partialStateMergesTotal.WithLabelValues("nil").Add(base * 3)
+	sr.partialStateMergesFailed.WithLabelValues("nfl").Add(base * 2)
+	sr.partialStateMergesTotal.WithLabelValues("nfl").Add(base * 3)
 
 	return reg
 }