Added PEERINGDB_APIKEY as build argument for Docker build against git master

Author: ipcjk

Readme.md

@@ -13,9 +13,41 @@ the prefix filter generator.
 
 # ixgen on docker
 
+## Running ixgen from Docker
+
 Run ixgen from docker with your peering configuration as volume parameter:
 
-docker run -v /Users/joerg/peering.ini:/ixgen/release/configuration/peering.ini joerg/ixgen:latest
+```bash
+docker run -v /path/to/peering.ini:/ixgen/configuration/peering.ini joerg/ixgen:latest
+```
+
+## Building from source with Docker
+
+Build ixgen from source using the Dockerfile.git:
+
+```bash
+# Build without API key (skips buildcache)
+docker build -f docker/Dockerfile.git -t ixgen:git .
+
+# Build with API key (runs buildcache during build)
+docker build --build-arg PEERINGDB_APIKEY=your-api-key -f docker/Dockerfile.git -t ixgen:git .
+
+# Run buildcache at runtime (alternative, avoids storing API key in image)
+docker run -e PEERINGDB_APIKEY=your-api-key ixgen:git /ixgen/ixgen -buildcache
+```
+
+### Using the built image
+
+```bash
+# Run with your configuration
+docker run -v /path/to/peering.ini:/ixgen/configuration/peering.ini ixgen:git
+
+# Run with custom cache directory
+docker run -v /path/to/peering.ini:/ixgen/configuration/peering.ini \
+           -v /path/to/cache:/ixgen/cache \
+           -e PEERINGDB_APIKEY=your-api-key \
+           ixgen:git
+```
 
 ## how it works
 

docker/Dockerfile.git

@@ -19,6 +19,9 @@ COPY --from=0 /build/bgpq4.linux  /ixgen/bgpq4.linux
 COPY --from=0 /build/bgpq4.license  /ixgen/bgpq4.license
 COPY --from=0 /build/templates  /ixgen/templates
 COPY --from=0 /build/LICENSE  /ixgen/LICENSE
-RUN /ixgen/ixgen -buildcache
+# Set PEERINGDB_APIKEY as build argument (optional, can be passed via --build-arg)
+ARG PEERINGDB_APIKEY=""
+ENV PEERINGDB_APIKEY=${PEERINGDB_APIKEY}
+RUN if [ -n "$PEERINGDB_APIKEY" ]; then /ixgen/ixgen -buildcache; else echo "Skipping buildcache (no API key provided)"; fi
 LABEL maintainer="Joerg Kost <jk@ip-clear.de>"