Troubleshoot Cinder Volume Backup Failure with Memory Error

Creating a backup of a Cinder volume on an NFS share fails with a memory error.

Problem

Attempting to create backup of a Cinder volume results in an out of memory error.

Cause

There is lack of available memory on the controller.

Solution

1. Implement the custom.yml file.

   sudo mkdir -p /opt/vmware/vio/custom
   sudo cp /var/lib/vio/ansible/custom/custom.yml.sample /opt/vmware/vio/custom/custom.yml

2. Edit the /opt/vmware/vio/custom/custom.yml file.
   1. Depending on the available controller memory, reduce the value of the cinder_backup_file_size parameter.
   2. Change = symbol following the cinder_backup_file_size parameter to :.
      For example,

      cinder_backup_file_size: 52428800

3. Save the custom.yml file.
4. Push the new configuration to your VMware Integrated OpenStack deployment.

   viocli deployment -v configure --limit controller