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The provided Dockerfile packages the dddserver gRPC endpoint into a minimal container image. Certificate downloading, binary compilation, and final image assembly are handled in a single docker build command — no manual setup is required. The build uses three stages:
  1. Python stage — runs dl_all_pks1.py and dl_all_pks2.py to download all ERCA public key certificates into the internal/pkg/certificates/ tree.
  2. Go stage — compiles dddparser, dddserver, and dddclient against the downloaded certificates.
  3. Scratch stage — copies only the dddserver binary and the minimum required system libraries into a near-empty final image.
1

Build the image

Run the following from the repository root:
docker build -t tachoparser .
The Python certificate download runs during the build. An active internet connection is required.
2

Run the container

Start the gRPC server on the default port 50055:
docker run -p 50055:50055 tachoparser
The server is now reachable at localhost:50055.
3

Change the listening port (optional)

To expose the server on a different host port, remap it with -p and pass the -listen flag to override the container-side port:
docker run -p 50056:50055 tachoparser /dddserver -listen :50055
The final image is based on scratch — it contains no package manager, no shell utilities beyond a minimal dash, and no debugging tools. If you need to inspect the container at runtime, attach a sidecar or build a separate debug image.
The Docker image contains only dddserver. If you need to use the dddparser or dddsimple command-line tools, build them locally and run them directly rather than through Docker.
Certificates are embedded into the image at build time. If ERCA publishes new certificates after the image is built, you must rebuild the image to pick them up.

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