Add hugepages 2Mi and 1Gi fields to ResourceDescription and pass them to the statefulset (#2311)

* Add hugepages-2Mi and 1Gi to ResourceDescription type and crd (#1549, #1788)
* Add tests for hugepages resource requests/limits
* Add tests for hugepages resource requests/limits on sidecars, too
* Add docs for hugepages support
* Add link to kubernetes docs on hugepages
* Add tests for hugepages not being set on container if not requested in custom resource
* Add hugepages resources fields to manifest docs
* Add hugepages resources fields to complete manifest example
* Add hugepages resources fields to chart crd

---------

Co-authored-by: Felix Kunde <felix-kunde@gmx.de>

manifests/complete-postgres-manifest.yaml

@@ -107,9 +107,13 @@ spec:
     requests:
       cpu: 10m
       memory: 100Mi
+#      hugepages-2Mi: 128Mi
+#      hugepages-1Gi: 1Gi
     limits:
       cpu: 500m
       memory: 500Mi
+#      hugepages-2Mi: 128Mi
+#      hugepages-1Gi: 1Gi
   patroni:
     failsafe_mode: false
     initdb:

manifests/postgresql.crd.yaml

@@ -439,6 +439,12 @@ spec:
                         pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
                         # Note: the value specified here must not be zero or be higher
                         # than the corresponding limit.
+                      hugepages-2Mi:
+                        type: string
+                        pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
+                      hugepages-1Gi:
+                        type: string
+                        pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
                   requests:
                     type: object
                     properties:
@@ -448,6 +454,12 @@ spec:
                       memory:
                         type: string
                         pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
+                      hugepages-2Mi:
+                        type: string
+                        pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
+                      hugepages-1Gi:
+                        type: string
+                        pattern: '^(\d+(e\d+)?|\d+(\.\d+)?(e\d+)?[EPTGMK]i?)$'
               schedulerName:
                 type: string
               serviceAnnotations: