In theory all the restic backends are supported.
Those tested are the following:
1linkbackends:
2link  name-of-backend:
3link    type: local
4link    path: /data/my/backups
1linkbackends:
2link  name-of-backend:
3link    type: b2
4link    path: 'backblaze_bucketID'
5link    # Or With a path
6link    # path: 'backblaze_bucketID:/some/path'
7link    env:
8link      B2_ACCOUNT_ID: 'backblaze_keyID'
9link      B2_ACCOUNT_KEY: 'backblaze_applicationKey'
If you use a File name prefix when making the application key, do not include a leading slash. Make sure to include this prefix in the path (e.g. path: 'backblaze_bucketID:my/path').
1linkbackends:
2link  name-of-backend:
3link    type: s3
4link    path: s3.amazonaws.com/bucket_name
5link    # Minio
6link    # path: http://localhost:9000/bucket_name
7link    env:
8link      AWS_ACCESS_KEY_ID: my_key
9link      AWS_SECRET_ACCESS_KEY: my_secret
For SFTP to work you need to use configure your host inside of ~/.ssh/config as password prompt is not supported. For more information on this topic please see the official docs on the matter.
1linkbackends:
2link  name-of-backend:
3link    type: sftp
4link    path: my-host:/remote/path/on/the/server
See here for how to install a rest server backend and here for further documentation.
1linkbackends:
2link  name-of-backend:
3link    type: rest
4link    path: http://localhost:8000/repo_name
5link    # Or authenticated
6link    path: https://user:pass@host:6969/path
Optionally you can set user and password separately
1linkbackends:
2link  rest:
3link    type: rest
4link    path: http://localhost:6969/path
5link    key: ...
6link    rest:
7link      user: user
8link      password: pass
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