Failed to setup SSH connection: [Unhandled exception occurred: [Errno 110] Connection timed out]

[KRK-Bowman]

Setting up a remote backup job and getting this error.

virtnbdbackup -U qemu+ssh://user@server/system --ssh-user user -d vm01 -l full -o /backup/vm01 -v
[2024-10-18 11:56:51] INFO lib common - printVersion [main]: Version: 2.15 Arguments: /usr/bin/virtnbdbackup -U qemu+ssh://user@server/system --ssh-user user -d vm01 -l full -o /backup/vm01 -v
[2024-10-18 11:56:51] INFO root virtnbdbackup - main [main]: Backup level: [full]
[2024-10-18 11:56:51] DEBUG output target - create [main]: Create: /backup/vm01/checkpoints
[2024-10-18 11:56:51] DEBUG virt client - _connect [main]: Libvirt URI: [qemu+ssh://user@server/system]
[2024-10-18 11:56:52] INFO virt client - _connect [main]: Connected to remote host: [server]
[2024-10-18 11:56:52] INFO root virtnbdbackup - main [main]: Libvirt library version: [8000000]
[2024-10-18 11:56:52] INFO root virtnbdbackup - main [main]: NBD library version: [1.10.5]
[2024-10-18 11:56:52] DEBUG virt client - getDomainDisks [main]: Disk [sda]: file notation
[2024-10-18 11:56:52] INFO root disktype - Optical [main]: Skipping attached [cdrom] device: [sdb].
[2024-10-18 11:56:52] DEBUG virt client - getDomainDisks [main]: Device list: [DomainDisk(target='sda', format='qcow2', filename='vm01-sda', path='/var/lib/libvirt/images/vm01-sda', backingstores=[])]
[2024-10-18 11:56:52] DEBUG virt client - getDomainInfo [main]: No setting [loader] found: 'NoneType' object has no attribute 'text'
[2024-10-18 11:56:52] DEBUG virt client - getDomainInfo [main]: No setting [nvram] found: 'NoneType' object has no attribute 'text'
[2024-10-18 11:56:52] DEBUG virt client - getDomainInfo [main]: No setting [kernel] found: 'NoneType' object has no attribute 'text'
[2024-10-18 11:56:52] DEBUG virt client - getDomainInfo [main]: No setting [initrd] found: 'NoneType' object has no attribute 'text'
[2024-10-18 11:56:52] DEBUG virt client - getDomainInfo [main]: Domain Info: [{}]
[2024-10-18 11:56:52] INFO root virtnbdbackup - main [main]: Backup will save [1] attached disks.
[2024-10-18 11:56:52] INFO root virtnbdbackup - main [main]: Concurrent backup processes: [1]
[2024-10-18 11:56:52] INFO root checkpoint - create [main]: Loading checkpoints from: [/backup/vm01/vm01.cpt]
[2024-10-18 11:56:52] INFO root checkpoint - redefine [main]: Loading checkpoint list from: [/backup/vm01/checkpoints]
[2024-10-18 11:56:52] INFO root checkpoint - create [main]: Checkpoint handling.
[2024-10-18 11:56:52] DEBUG root checkpoint - removeAll [main]: Cleaning up persistent storage /backup/vm01/checkpoints
[2024-10-18 11:56:52] INFO root checkpoint - create [main]: Using checkpoint name: [virtnbdbackup.0].
[2024-10-18 11:56:52] DEBUG root checkpoint - create [main]: Checkpoint info: [{'name': 'virtnbdbackup.0', 'parent': '', 'file': '/backup/vm01/vm01.cpt'}].
[2024-10-18 11:56:52] INFO ssh client - connect [main]: Connecting remote system [server] via ssh, username: [user]
[2024-10-18 11:59:02] ERROR ssh client - connect [main]: [Errno 110] Connection timed out
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/libvirtnbdbackup/ssh/client.py", line 69, in connect
cli.connect(
File "/usr/lib/python3/dist-packages/paramiko/client.py", line 349, in connect
retry_on_signal(lambda: sock.connect(addr))
File "/usr/lib/python3/dist-packages/paramiko/util.py", line 279, in retry_on_signal
return function()
File "/usr/lib/python3/dist-packages/paramiko/client.py", line 349, in
retry_on_signal(lambda: sock.connect(addr))
TimeoutError: [Errno 110] Connection timed out
[2024-10-18 11:59:02] WARNING lib common - sshSession [main]: Failed to setup SSH connection: [Unhandled exception occurred: [Errno 110] Connection timed out]
[2024-10-18 11:59:02] ERROR root virtnbdbackup - main [main]: Remote backup detected but ssh session setup failed

Remote server (server) syslog shows:

libvirtd[4019713]: End of file while reading data: Input/output error

Tried 'aa-teardown' on both the local and remote systems and verified DNS connectivity, at a loss at what to try next.

Thanks in advance!

[abbbi]

The ssh session to the Remote system runs into timeout..

[KRK-Bowman]

Can the timeout value be increased somehow? (Thanks for the quick reply BTW!)

[abbbi]

not at the moment, is the target system reachable via regular ssh command?