An image providing baked-in support for debugging the .NET Core runtime
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This image provides versions of the .NET Core runtime built for easier debugging support. The base image is built from the .NET runtime with a SSH server and the VSDebugger pre-installed.
To use the image you need to copy a SSH public key and modify how your application is ran. To generate an SSH keypair you can use the following command, it is recommended that you enter a passphrase when prompted:
ssh-keygen -t rsa -f ./debugkey
This will generate two files, debugkey and debugkey.pub. The first is the private key and should be stored securely, the latter is used next. In your docker image, add the following line to write the public key to the SSH servers authorised keys.
RUN mkdir /root/.ssh
RUN echo "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDNv3QhqPOc0NthhDDbgkuspynfzZMJtLahoHPvTub9sWBZN5gTUNBMdVF8DEn9MQ8Uuf81rGAW0Jr8LDg7tSvKSNnL1+6wi7MolwE+KXzWwwX7DdvFMzx+lM9VHxC6BckjicG6pCTJVZKqzuONWb3uL/JjSeDDjYb8vMkhE4Uv4L8g4MzpZlP4QlJ8LRfv+pPqhoK6rloHvc3cFfRIn2wyoeXNcR/PGr/xP0Wv3c3y8FXlw936mOTAbZjWxnnXG7ok+iuKQcs80ayStL9LFISzCg7H6+wQlXvLAPOlsUXv+eB62AAvs6koAR5vGm4Sdr0dxJvyTaL+6U+V7FvC5FTn" > root/.ssh/authorized_keys
Now create a file named run.sh in your image, entering the first line followed by your usual entrypoint. For example:
#!/bin/bash
/usr/sbin/sshd -D &
dotnet ExampleApp.dll
Then alter your dockerfile to copy the script and run it in your entrypoint. A full example of your applications dockerfile should look similar to this:
# Build
FROM microsoft/dotnet:2.1-sdk AS build
WORKDIR /app
COPY ./src/ExampleApp ./
RUN dotnet restore
RUN dotnet publish -c RELEASE -o build
# Run
FROM wifiplug/dotnet-debug AS runtime
WORKDIR /app
COPY --from=build /app/build .
COPY ./run.sh /app
RUN mkdir /root/.ssh
RUN echo "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDNv3QhqPOc0NthhDDbgkuspynfzZMJtLahoHPvTub9sWBZN5gTUNBMdVF8DEn9MQ8Uuf81rGAW0Jr8LDg7tSvKSNnL1+6wi7MolwE+KXzWwwX7DdvFMzx+lM9VHxC6BckjicG6pCTJVZKqzuONWb3uL/JjSeDDjYb8vMkhE4Uv4L8g4MzpZlP4QlJ8LRfv+pPqhoK6rloHvc3cFfRIn2wyoeXNcR/PGr/xP0Wv3c3y8FXlw936mOTAbZjWxnnXG7ok+iuKQcs80ayStL9LFISzCg7H6+wQlXvLAPOlsUXv+eB62AAvs6koAR5vGm4Sdr0dxJvyTaL+6U+V7FvC5FTn" > root/.ssh/authorized_keys
EXPOSE 80
ENTRYPOINT ["bash", "/app/run.sh"]
Content type
Image
Digest
Size
140.5 MB
Last updated
over 8 years ago
docker pull wifiplug/dotnet-debug