You may leverage the operating system (Red Hat Enterprise Linux) capabilities for handling encryption of data at rest, such as LUKS Disk Encryption.

The following links provide more information on that topic:

• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/security_guide/sec-encryption

• https://www.redhat.com/sysadmin/disk-encryption-luks

• https://opensearch.org/docs/latest/troubleshoot/index/#encryption-at-rest

Please make sure to use XFS file system where required to match the product prerequisites.