0 1 How to set permission on Volume mount

In my CDK app I have an ElasticSearch docker that starts on an EC2 instance and on start up it cannot write to the host path's Volume mount point directory which I set to /mnt/data/elasticsearch/ so the container stops,
The reason is the permissions on the directory when the instance is starts is 755. When I SSH into the instance and change it to 777 the container starts up and continues on without issue.

This is how I create the volume and mount point

 import software.amazon.awscdk.services.ecs.Volume  
  
 auto_scaling_groupp.addUserData("sudo chmod -R 777  /usr/share/elasticsearch/data);` // This has no effect   
  
 Volume hostVolume =  Volume.builder().name("elasticsearch").host(Host.builder()  
                         .sourcePath(/mnt/data/elasticsearch).build()).build();  
   
MountPoint elasticSrvrMntPt = MountPoint.builder().readOnly(false).sourceVolume(hostVolume.getName())  
                .containerPath("/usr/share/elasticsearch/data").build();  
  
ElasticDef.addMountPoints(elasticSrvrMntPt);  

I cannot find in the API how to either give permission to that container or change the permission on the folder
Thanks

Edited by: sdiventura on Apr 9, 2021 2:16 PM