Add hard memory limits and gc collection

Author: Bhavik Kumar

Dockerfile

@@ -10,7 +10,7 @@ ENV APP_CONTEXT "${APPLICATION_CONTEXT}"
 
 CMD ["ntpd", "-s"]
 ENTRYPOINT ["java", "-Djava.security.egd=file:/dev/./urandom", "-Dserver.servlet.context-path=/${APP_CONTEXT}", \
-  "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap","-jar", "/app.jar"]
+  "-XX:+UseG1GC -XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap","-jar", "/app.jar"]
 
 HEALTHCHECK --start-period=90s \
   CMD wget --quiet --tries=1 --spider --timeout=30 http://localhost:8080/${APP_CONTEXT}/1/ping || exit 1

deployment/templates/service.yaml

@@ -16,6 +16,7 @@ Metadata:
       - ContainerName
       - DesiredCount
       - CPUReservation
+      - MemoryLimit
       - MemoryReservation
       - HealthCheckGracePeriodSeconds
       - ApplicationContext
@@ -55,6 +56,11 @@ Parameters:
     Default: 1024
     AllowedValues: [20, 128, 256, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096]
 
+  MemoryLimit:
+    Type: Number
+    Default: 1024
+    AllowedValues: [20, 128, 256, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096]
+
   CPUReservation:
     Type: Number
     Default: 128
@@ -147,6 +153,7 @@ Resources:
         Image: !Join ['', ["Fn::Sub": '${AWS::AccountId}.dkr.ecr.${AWS::Region}.amazonaws.com/', "Fn::ImportValue": {"Fn::Sub":'${AWS::StackName}-RepositoryName'}, ':latest']]
         Essential: true
         Cpu: !Ref CPUReservation
+        Memory: !Ref MemoryLimit
         MemoryReservation: !Ref MemoryReservation
         PortMappings:
         - ContainerPort: 8080