#Known issue: https://vpxd.wordpress.com/2016/09/07/veeam-backup-agent-for-linux-beta2-centos-7/ once done you can check that module veeamsnap is loaded.
lsmod | grep veeam
veeamsnap 260620 0
otherwise you can have problems with backups.
2016-09-07 15:39:53 [error] Failed to create volume snapshot 00:00:02
2016-09-07 15:39:55 [error] Child execution has failed. Exit code: ...
2016-09-07 15:39:55 [error] Failed to load module [veeamsnap] with ...
2016-09-07 15:39:55 [error] Failed to perform backup