FROM openjdk:8-slim # Build arguments ARG FABRIC_VERSION # Create worlds and config directory WORKDIR /mc RUN mkdir worlds config # Download installer jar ADD "https://maven.fabricmc.net/net/fabricmc/fabric-installer/$FABRIC_VERSION/fabric-installer-$FABRIC_VERSION.jar" installer.jar # Install fabric & remove installer RUN java -jar installer.jar server -downloadMinecraft && \ rm installer.jar # Store the cache in an anonymous volume, which means it won't get stored in the other volumes VOLUME /mc/config/cache WORKDIR /mc/config # Default value to keep users from eating up all ram accidentally ENV XMS=4 # We copy over the server jar(s) as well to make the backup more reproducible to deploy ENTRYPOINT mv -n /mc/*.jar /mc/config && \ echo "eula=true" > /mc/config/eula.txt && \ java \ -Xms"${XMS}G" \ -Xmx"${XMX:-$XMS}G" \ -XX:+UseG1GC \ -XX:+ParallelRefProcEnabled \ -XX:MaxGCPauseMillis=200 \ -XX:+UnlockExperimentalVMOptions \ -XX:+DisableExplicitGC \ -XX:+AlwaysPreTouch \ -XX:G1NewSizePercent="$([ $XMS -gt 12 ] && echo 40 || echo 30)" \ -XX:G1MaxNewSizePercent="$([ $XMS -gt 12 ] && echo 50 || echo 40)" \ -XX:G1HeapRegionSize="$([ $XMS -gt 12 ] && echo 16 || echo 8)"M \ -XX:G1ReservePercent="$([ $XMS -gt 12 ] && echo 15 || echo 20)" \ -XX:G1HeapWastePercent=5 \ -XX:G1MixedGCCountTarget=4 \ -XX:InitiatingHeapOccupancyPercent="$([ $XMS -gt 12 ] && echo 20 || echo 15)" \ -XX:G1MixedGCLiveThresholdPercent=90 \ -XX:G1RSetUpdatingPauseTimePercent=5 \ -XX:SurvivorRatio=32 \ -XX:+PerfDisableSharedMem \ -XX:MaxTenuringThreshold=1 \ -Dusing.aikars.flags=https://mcflags.emc.gs \ -Daikars.new.flags=true \ -jar fabric-server-launch.jar \ --universe /mc/worlds \ --nogui