The Basics
- Nextcloud Server version (e.g., 29.x.x):
10.14.0
- Operating system and version (e.g., Ubuntu 24.04):
Debian 12
- Web server and version (e.g, Apache 2.4.25):
Nextcloud AIO Container
- Reverse proxy and version _(e.g. nginx 1.27.2)
Caddy
- PHP version (e.g, 8.3):
Nextcloud AIO Container
- Is this the first time you’ve seen this error? (Yes / No):
yes
- When did this problem seem to first start?
today, first try
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
no
Summary of the issue you are facing:
Borg backup on ssh failed.
Steps to replicate it (hint: details matter!):
- Generate ssh public key and copy to remote
- try to create a backup
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
2025-05-25T07:43:28.396976312Z Your public ssh key for borgbackup is: ssh-ed25519 ***
2025-05-25T07:43:28.906317539Z Remote: ssh: Could not resolve hostname ***: Name does not resolve
2025-05-25T07:43:28.910138481Z Connection closed by remote host. Is borg working on the server?
2025-05-25T07:43:28.943799305Z Initializing repository...
2025-05-25T07:43:29.254152976Z using builtin fallback logging configuration
2025-05-25T07:43:29.377190897Z 33 self tests completed in 0.12 seconds
2025-05-25T07:43:29.378006079Z SSH command line: ['ssh', '-o', 'StrictHostKeyChecking=accept-new', '-i', '/nextcloud_aio_volumes/nextcloud_aio_mastercontainer/data/id_borg', '-p', '23', '***>
2025-05-25T07:43:29.395887575Z Remote: ssh: Could not resolve hostname ***: Name does not resolve
2025-05-25T07:43:29.399207325Z Connection closed by remote host. Is borg working on the server?
2025-05-25T07:43:29.399212375Z Traceback (most recent call last):
2025-05-25T07:43:29.399214325Z File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 5391, in main
2025-05-25T07:43:29.399216365Z exit_code = archiver.run(args)
2025-05-25T07:43:29.399218135Z ^^^^^^^^^^^^^^^^^^
2025-05-25T07:43:29.399219895Z File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 5309, in run
2025-05-25T07:43:29.399222015Z rc = func(args)
2025-05-25T07:43:29.399223785Z ^^^^^^^^^^
2025-05-25T07:43:29.399227815Z File "/usr/lib/python3.12/site-packages/borg/archiver.py", line 169, in wrapper
2025-05-25T07:43:29.399229785Z repository = RemoteRepository(location.omit_archive(), create=create, exclusive=argument(args, exclusive),
2025-05-25T07:43:29.399231745Z ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-05-25T07:43:29.399233755Z File "/usr/lib/python3.12/site-packages/borg/remote.py", line 594, in __init__
2025-05-25T07:43:29.399235615Z raise ConnectionClosedWithHint('Is borg working on the server?') from None
2025-05-25T07:43:29.399237435Z borg.remote.ConnectionClosedWithHint: Connection closed by remote host. Is borg working on the server?
2025-05-25T07:43:29.399239295Z
2025-05-25T07:43:29.399241085Z Platform: Linux 386ba90af4d8 6.1.0-35-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.137-1 (2025-05-07) x86_64
2025-05-25T07:43:29.399242995Z Linux: Unknown Linux
2025-05-25T07:43:29.399244745Z Borg: 1.4.0 Python: CPython 3.12.10 msgpack: 1.0.8 fuse: llfuse 1.5.1 [pyfuse3,llfuse]
2025-05-25T07:43:29.399246585Z PID: 41 CWD: /
2025-05-25T07:43:29.399248335Z sys.argv: ['/usr/bin/borg', 'init', '--debug', '--encryption=repokey-blake2']
2025-05-25T07:43:29.399250155Z SSH_ORIGINAL_COMMAND: None
2025-05-25T07:43:29.399251935Z
2025-05-25T07:43:29.424826804Z Could not initialize borg repository.
Thank you for any hint.
I can ping that url when borg container is running from inside.
Greetings