docker : invalid reference format

问题:

I'm following this tutorial: https://medium.com/towards-data-science/number-plate-detection-with-supervisely-and-tensorflow-part-1-e84c74d4382c

and they use docker. When I tried to run docker (inside the run.sh script):

docker run -p 8888:8888 -v `pwd`/../src:/src -v `pwd`/../data:/data -w /src supervisely_anpr --rm -it bash

I got the error:

docker: invalid reference format.

I spent 2 hours and I can't really understand what's wrong. Any idea really appreciated.

回答1:

In powershell you should use ${pwd} vs $(pwd)

回答2:

The first argument after the "run" that is not a flag or parameter to a flag is parsed as an image name. When that parsing fails, it tells you the reference format, aka image name (but could be an image id, pinned image, or other syntax) is invalid. In your command:

 docker run -p 8888:8888 -v `pwd`/../src:/src -v `pwd`/../data:/data -w /src supervisely_anpr --rm -it bash

The image name "supervisely_anpr" is valid, so you need to look earlier in the command. In this case, the error is most likely from pwd outputting a path with a space in it. Everything after the space is no longer a parameter to -v and docker tries to parse it as the image name. The fix is to quote the volume parameters when you cannot guarantee it is free of spaces or other special characters.

When you do that, you'll encounter the next error, "executable not found". Everything after the image name is parsed as the command to run inside the container. In your case, it will try to run the command --rm -it bash which will almost certainly fail since --rm will no exist as a binary inside your image. You need to reorder the parameters to resolve that:

 docker run --rm -it -p 8888:8888 -v "`pwd`/../src:/src" -v "`pwd`/../data:/data" -w /src supervisely_anpr  bash

I've got some more details on these two errors and causes in my slides here: https://sudo-bmitch.github.io/presentations/dc2018/faq-stackoverflow-lightning.html#29

回答3:

I had a similar problem. Issue I was having was $(pwd) has a space in there which was throwing docker run off.

Change the directory name to not have spaces in there, and it should work if this is the problem