add huge pages functionality (#135)

Co-authored-by: rwinieski <[email protected]>

Author: rwinieski

charts/templates/statefulset.yaml

@@ -106,6 +106,10 @@ spec:
             - name: mladmin-secrets
               mountPath: /run/secrets/ml-secrets
               readOnly: true
+            {{- if .Values.hugepages.enabled }}
+            - name: huge-pages
+              mountPath: {{ .Values.hugepages.mountPath }}
+            {{- end }}            
           env:
             - name: MARKLOGIC_ADMIN_USERNAME_FILE
               value: "ml-secrets/username"
@@ -363,6 +367,11 @@ spec:
           configMap:
             name: {{ include "marklogic.fullname" . }}-fb-config-map
         {{- end }}
+        {{- if .Values.hugepages.enabled }}
+        - name: huge-pages
+          emptyDir:
+            medium: HugePages
+        {{- end }}  
         {{- if not .Values.persistence.enabled }}
         - name: datadir
           emptyDir: {}

charts/values.yaml

@@ -42,15 +42,30 @@ imagePullSecrets: []
 # - name: "your-secret-name-1"
 # - name: "your-secret-name-2"
 
+
+## Manage HugePages
+## ref: https://v1-23.docs.kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/
+  #####################################################
+  ## NOTE : MarkLogic only supports 2Mi huge pages   ##
+  #####################################################
+hugepages:
+  enabled: false
+  mountPath: /dev/hugepages
+
 ## Marklogic pods' resource requests and limits
 ## ref: https://kubernetes.io/docs/user-guide/compute-resources/
+  ################################################################
+  ## NOTE : When using huge pages requests should equal limits  ##
+  ################################################################
 resources: {}
-# requests:
-#   memory: "3000Mi"
-#   cpu: "1000m"
-# limits:
-#   memory: "3000Mi"
-#   cpu: "1000m"
+#   requests:
+#     memory: "3000Mi"
+#     cpu: "1000m"
+#     hugepages-2Mi: 1Gi
+#   limits:
+#     memory: "3000Mi"
+#     cpu: "1000m"
+#     hugepages-2Mi: 1Gi
 
 nameOverride: ""
 fullnameOverride: ""