Switching NFS Backing file

Trilio employs a base64 hash to establish the mount point for NFS Backup targets, ensuring compatibility across multiple NFS Shares within a single Trilio installation. This hash is an integral component of Trilio's incremental backups, functioning as an absolute path for backing files.

Consequently, during a disaster recovery or rapid migration situation, the utilization of a mount bind becomes necessary.

In scenarios that allow for a comprehensive migration period, an alternative approach comes into play. This involves modifying the backing file, thereby enabling the accessibility of Trilio backups from a different NFS Share. The backing file is updated to correspond with the mount point of the new NFS Share.

Backing file change script

Trilio provides a shell script for the purpose of changing the backing file. This script is used after the Trilio appliance has been reconfigured to use the new NFS share.

Downloading the shell script

Please request the shell script from your Trilio Customer Success Manager or Customer Success Engineer by opening a case from our Customer Portal. It is not publically available for download at this time.

Prerequisites

The following requirements need to be met before the change of the backing file can be attempted.

• The Trilio Appliance has been reconfigured with the new NFS Share

• The Openstack environment has been reconfigured with the new NFS Share

  • Please check here for Red Hat Openstack Platform

• The workloads are available on the new NFS Share

• The workloads are owned by nova:nova user

Usage

The shell script is changing one workload at a time.

The shell script has to run as nova user, otherwise the owner will get changed and the backup can not be used by Trilio.

Run the following command:

./backing_file_update.sh /var/triliovault-mounts/<base64>/workload_<workload_id>

with

• /var/triliovault-mounts/<base64>/ being the new NFS mount path

• workload_<workload_id> being the workload to rebase

Logging of the procedure

The shell script is generating the following log file at the following location:

/tmp/backing_file_update.log

The log file will not get overwritten when the script is run multiple times. Each run of the script will append the available log file.