ObjectDetectionCoral stops working when restarting the docker container.

[mikegleasonjr]

Area of Concern

• Server
• Behaviour of ObjectDetectionCoral
• Installer
• Runtime [e.g. Python3.7, .NET]
• Module packages [e.g. PyTorch)
• Something else

Describe the bug

1. I am running a docker container with the codeproject/ai-server image with 2 volumes (so that I can restart it without having to reinstall/reconfigure everything):

• /etc/codeproject/ai
• /app/modules

2. I installed the Object Detection (Coral) module, which worked fine with my TPU. I called the API and verified that everything was working.
3. I stopped the container
4. I started back the container
5. The module now has this error: objectdetection_coral_adapter.py: An exception occurred initialising the module: libedgetpu.so.1: cannot open shared object file: No such file or dir

Expected behavior
The module restarts properly in the docker container.

I know what the problem actually is: In ObjectDetectionCoral/install.sh, there is a line to copy the shared library in /usr/lib/x86_64-linux-gnu/ upon module installation:

cp "${moduleDirPath}/edgetpu_runtime/${edgetpu_folder}/k8/libedgetpu.so.1.0" "/usr/lib/x86_64-linux-gnu/libedgetpu.so.1.0"

Obvisouly when restarting the container, this change is lost since I do not mount /usr/lib/x86_64-linux-gnu/ as a volume to be persistent across "reboots".

I don't know if modules have a startup hook where these steps of copying the shared object and running of ldconfig could be done there?

Screenshots
N/A

Your System (please complete the following information):

• CodeProject.AI Server version: codeproject/ai-server:2.6.2
• Object Detection (Coral) version: 2.2.0

Additional context
See Expected behavior

[matthewDDennis]

How are you starting the Docker container?

• if a command line Docker run, add --restart=always. This might fix things, but might not.

[mikegleasonjr]

Hi @matthewDDennis, thanks for the help. It is my feeling that the bug report wasn't fully understood though. The bug is actually known and described in the "Expected behavior" section (at least I tried to explain it). This isn't about Docker not restarting the container.

Please feel free to ask questions if it is still misunderstood 🙏🏻

[mikegleasonjr]

Maybe the ObjectDetectionCoral module should redo some steps it does upon installation in the initialise phase of the module: https://www.codeproject.com/ai/docs/devguide/module_examples/add_python_module.html#writing-the-module

It copies files into the host at the location: /usr/lib/x86_64-linux-gnu/. Those files are obviously lost when restarting the container.

There is no mention about mounting other volumes other than the settings/module folders in the documentation: https://www.codeproject.com/ai/docs/install/running_in_docker.html#advanced-docker-launch-settings-saved-outside-of-the-container