minecraft/dockerfiles/Dockerfile.vanilla

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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 -eux && \
# 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"]