How can I get the .NET Core SDK to work on Docker?

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Yasser Khan

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May 6, 2019, 9:08:50 PM5/6/19
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Question:

How can I get the .NET Core SDK to work on Docker? I get the following exception: Unhandled Exception: System.DllNotFoundException: Unable to load shared library 'PDFNetC' or one of its dependencies.

Answer:

The project needs to know where the shared lib is located. You can achieve this by any one of the following 2 approaches.

Approach 1:

You will add the following to the Docker file:

COPY libPDFNet* /usr/lib/
RUN rm /usr/lib/libPDFNetC.so;\
        mv /usr/lib/libPDFNetC.so.6.10.0 /usr/lib/libPDFNetC.so

Adding the above commands will resolve the following two issues:
1. PDFTron's native library needs to be placed directly in "/usr/lib/" folder
2. Docker does not like how we symlink the so files, so removing the symlink is required

Approach 2:

1. Manually remove the symlink libPDFNetC.so and rename the versioned so to libPDFNetC.so
2. Edit the .csproj file to directly point to libPDFNetC.so
		<Content Include="/src/MyApp/libPDFNetC.so">
			<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
		</Content>


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