FROM "${JRE_IMAGE:-localhost/minecraft-jre}":"${JRE_TAG:-latest}" # Minecraft version to download ARG VERSION=latest # Download files and run as user USER minecraft WORKDIR /app # Download and verify sha1sum for server.jar RUN set -ux && \ # Grab latest version if not specified if [ "$VERSION" = "latest" ]; then \ VERSION="$( \ curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \ | jq -r '.latest.release' \ )"; \ fi && \ # Get server.jar based on $VERSION curl -s https://launchermeta.mojang.com/mc/game/version_manifest.json \ | jq -r --arg id "$VERSION" '.versions[] | select(.id == $id) | .url' \ | xargs curl -s | jq -r '.downloads.server' | tee "/tmp/dl.json" \ | jq -r '.url' | xargs curl -s -o server.jar && \ # Get SHA1 hash of server.jar and compare SHA1="$(sha1sum server.jar | awk '{print $1}')" && \ EXPECTED="$(jq -r .sha1 /tmp/dl.json)"; rm /tmp/dl.json && \ if [ ! "$SHA1" = "$EXPECTED" ]; then \ echo "[ERROR] SHA1=\"$SHA1\" expected \"$EXPECTED\""; \ exit 1; \ fi # Generate initial settings RUN java -jar server.jar --initSettings --nogui # Back to root to copy the entrypoint in USER root WORKDIR /app # Copy in entrypoint script COPY ../entrypoint.sh /usr/local/bin/entrypoint.sh RUN chmod +x /usr/local/bin/entrypoint.sh # Run app as minecraft user USER minecraft WORKDIR /app # Expose port and run entrypoint script EXPOSE 25565 ENTRYPOINT ["entrypoint.sh"]