for idaholab#539, some containers need resource request specified for…

… Kubernetes. parse out opensearch and logstash JAVA_OPTS and create kubernetes resource requests for memory basedon those values to ensure those containers don't start on pods with insufficient memory

scripts/malcolm_common.py

@@ -7,6 +7,7 @@
 import importlib
 import json
 import os
+import math
 import platform
 import re
 import string
@@ -172,6 +173,31 @@ def LocalPathForContainerBindMount(service, dockerComposeContents, containerPath
     return localPath
 
 
+##################################################################################################
+def GetMemMegabytesFromJavaOptsLine(val):
+    resultStr = None
+    resultMB = 0
+    for opt in ('Xmx', 'Xms'):
+        if resultStr is not None:
+            break
+        if match := re.search(fr'-{opt}(\d+[kmg])', val, re.IGNORECASE):
+            resultStr = match.group(1)
+    if resultStr is not None:
+        value = int(resultStr[:-1])
+        unit = resultStr[-1].lower()
+        if unit == 'g':
+            resultMB = value * 1024
+        elif unit == 'm':
+            resultMB = value
+        elif unit == 'k':
+            resultMB = math.ceil(value / 1024)
+        else:
+            resultMB = 0
+        if resultMB < 1:
+            resultMB = 0
+    return resultMB
+
+
 ##################################################################################################
 def GetUidGidFromEnv(configDir=None):
     configDirToCheck = configDir if configDir and os.path.isdir(configDir) else os.path.join(MalcolmPath, 'config')