Revert "Subtract hugepages from memory capacity and allocatables"

This reverts commit faa05e7.

Author: harche

Diff for: install/0000_90_machine-config-operator_01_prometheus-rules.yaml

@@ -51,7 +51,7 @@ spec:
       rules:
         - alert: SystemMemoryExceedsReservation
           expr: |
-            sum by (node) (container_memory_rss{id="/system.slice"}) > ((sum by (node) (kube_node_status_capacity{resource="memory"}) - sum by (node) (kube_node_status_capacity{resource="hugepages_1Gi"}) - sum by (node) (kube_node_status_capacity{resource="hugepages_2Mi"}) - sum by (node) (kube_node_status_allocatable{resource="memory"}) - sum by (node)  (kube_node_status_allocatable{resource="hugepages_1Gi"}) - sum by (node)  (kube_node_status_allocatable{resource="hugepages_2Mi"})) * 0.9)
+            sum by (node) (container_memory_rss{id="/system.slice"}) > ((sum by (node) (kube_node_status_capacity{resource="memory"} - kube_node_status_allocatable{resource="memory"})) * 0.9)
           for: 15m
           labels:
             severity: warning