Bind /tmp/docker.sock in backup spawned container #95
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Override volumes for the backup runner so the backup process container gets a direct mount of the socket. Otherwise the verb `status` works but `backup` generates the following error:
```
Traceback (most recent call last):
File "/restic-compose-backup/.venv/lib/python3.14/site-packages/urllib3/connectionpool.py", line 787, in urlopen
response = self._make_request(
conn,
...<10 lines>...
**response_kw,
)
File "/restic-compose-backup/.venv/lib/python3.14/site-packages/urllib3/connectionpool.py", line 493, in _make_request
conn.request(
~~~~~~~~~~~~^
method,
^^^^^^^
...<6 lines>...
enforce_content_length=enforce_content_length,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/restic-compose-backup/.venv/lib/python3.14/site-packages/urllib3/connection.py", line 445, in request
self.endheaders()
~~~~~~~~~~~~~~~^^
File "/root/.local/share/uv/python/cpython-3.14.0-linux-x86_64-musl/lib/python3.14/http/client.py", line 1333, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/root/.local/share/uv/python/cpython-3.14.0-linux-x86_64-musl/lib/python3.14/http/client.py", line 1093, in _send_output
self.send(msg)
~~~~~~~~~^^^^^
File "/root/.local/share/uv/python/cpython-3.14.0-linux-x86_64-musl/lib/python3.14/http/client.py", line 1037, in send
self.connect()
~~~~~~~~~~~~^^
File "/restic-compose-backup/.venv/lib/python3.14/site-packages/docker/transport/unixconn.py", line 26, in connect
sock.connect(self.unix_socket)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory
```
where self.unix_socket is `/tmp/docker.sock`.
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Possibly addresses issue #83: override volumes for the backup runner so the backup process container gets a direct mount of the socket. Otherwise the verb
statusworks butbackupgenerates the following error becauseself.unix_socket(value/tmp/docker.sock) is not mounted inside the backup container: