python3 failing with a Unknown schema error when I attempt to connect to a non-default unix domain socket. #601
Comments
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@Dweller if you can, please provide your pylxd script to allow us to easily replicate the issue. Thanks |
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It works for me when providing a valid path to a Unix socket: $ python3
Python 3.10.12 (main, Jul 29 2024, 16:56:48) [GCC 11.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from pylxd import Client, exceptions
>>> lxd = Client("/var/snap/lxd/common/lxd/unix.socket")
>>> for i in lxd.instances.all():
... print (i.name)
...
autopkg
c1
c6
cs50-python
jammy-builder
lxd-core18
lxd-imagebuilder
noble-builder
wine-gamesHowever, providing a path to a non-existent socket gives the same error you got: >>> lxd = Client("/var/snap/lxd/common/lxd/unix.socket2")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/sdeziel/git/pylxd/pylxd/client.py", line 410, in __init__
response = self.api.get()
File "/home/sdeziel/git/pylxd/pylxd/client.py", line 206, in get
response = self.session.get(self._api_endpoint, *args, **kwargs)
File "/home/sdeziel/.local/lib/python3.10/site-packages/requests/sessions.py", line 602, in get
return self.request("GET", url, **kwargs)
File "/home/sdeziel/.local/lib/python3.10/site-packages/requests/sessions.py", line 575, in request
prep = self.prepare_request(req)
File "/home/sdeziel/.local/lib/python3.10/site-packages/requests/sessions.py", line 486, in prepare_request
p.prepare(
File "/home/sdeziel/.local/lib/python3.10/site-packages/requests/models.py", line 368, in prepare
self.prepare_url(url, params)
File "/home/sdeziel/.local/lib/python3.10/site-packages/requests/models.py", line 439, in prepare_url
raise MissingSchema(
requests.exceptions.MissingSchema: Invalid URL '/var/snap/lxd/common/lxd/unix.socket2/1.0': No scheme supplied. Perhaps you meant https:///var/snap/lxd/common/lxd/unix.socket2/1.0? |
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The socket exists and is openable.. Mine which is inside a LXD instance.. You'll note that the error message isn't that it can't open the socket its that it doesn't have a unix or http schema prefix.. Not that adding on of those helps.. |
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What strange is if I call Client() without an endpoint argument it works.. But if I specify the path of the endpoint /var/snap/lxd/common/lxd/unix.socket it doesn't. Yet internally I can see its using that path.. So it would appear that the processing of the endpoint vs the default value is different. I've confirmed that the path is correct by cuting and pasting the one I was using in my code and using it in a command line curl command. So I know the permissions etc. are correct. |
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I wrote some python to open a unix domain socket directly to the unix.socket and that works... So confirmed no issues with the permissions. Apart from debuging the pylxd connection code I'm not sure whats left? |
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It just occurred to me that your pylxd script is being run inside an instance and you are using
Inside instances, this socket path belongs to |
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So I have it working now... Previously.. only the lxdsocket would work but now I've no issues using /var/run/lxd.socket I spotted my error when I upgraded my code to use lxd.instances (previously lxd.containers). the managers stopped working because the where using pylxd 2.2 where as that support came in a pyld2.3. As if by magic the socket connection started to work.. So now I can remove my kludge.. Thank you for you patience... lxdsocket: |
I'm currently running a snap lxd 5.21 on centos8 and a pip installed pylxd of version 2.3.1
I've a LXD container which runs a pylxd script and that connects to the hosts LXD server via a proxy.
Currently I have to use a LXD proxy to mirror the default location of the unix.socket to get this to work.
lxdsocket:
bind: container
connect: unix:/var/snap/lxd/common/lxd/unix.socket
gid: "1001"
listen: unix:/var/snap/lxd/common/lxd/unix.socket
mode: "0660"
type: proxy
uid: "0"
As soon as I attempt to override the pylxd module the script bails with an unknown schema error. Looks like the requests module wants a unix: or http: prefix. However adding one doesn't help.
e.g. Client('/var/lxd/host.sock')Is there a fix for this..
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