Adding Linux repository to Veeam hangs on volume discovery and fails silently

KB ID: 2019
Product: Veeam Backup & Replication
Version: 6.x, 7.x, 8.x
Published: 2015-03-26
Last Modified: 2020-08-13
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Challenge

When connecting to a Linux repository with Veeam, the connection hangs on the volume discovery step and silently errors out. 

Cause

When Veeam connects to a Linux target the SSH session is opened without a TTY. In some versions of Linux (particularly recent releases of CentOS such as 6.6. and 7, and RHEL5 and higher), this is caused by RequireTTY being set as a default option in the /etc/sudoers file.

Solution

Note: A reboot may be required.
 
To disable RequireTTY globally:
1. Run visudo
2. Find the line for requiretty
3. Comment it out
 
To disable RequireTTY for a specific user:
1. Run the command visudo
2. Create a new line Defaults:<username> !requiretty
Where <username> is the Linux username given to Veeam Backup & Replication when adding the NFS repository.
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