Set maximum CPU and Memory requests on K8s (#1959)

* Set maximum CPU and Memory requests on K8s

charts/postgres-operator/crds/operatorconfigurations.yaml

@@ -350,6 +350,12 @@ spec:
                     type: string
                     pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
                     default: "100Mi"
+                  max_cpu_request:
+                    type: string
+                    pattern: '^(\d+m|\d+(\.\d{1,3})?)$'
+                  max_memory_request:
+                    type: string
+                    pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
                   min_cpu_limit:
                     type: string
                     pattern: '^(\d+m|\d+(\.\d{1,3})?)$'

charts/postgres-operator/values.yaml

@@ -217,6 +217,12 @@ configPostgresPodResources:
   default_memory_limit: 500Mi
   # memory request value for the postgres containers
   default_memory_request: 100Mi
+  # optional upper boundary for CPU request
+  # max_cpu_request: "1"
+
+  # optional upper boundary for memory request
+  # max_memory_request: 4Gi
+
   # hard CPU minimum required to properly run a Postgres cluster
   min_cpu_limit: 250m
   # hard memory minimum required to properly run a Postgres cluster