systemd unit file for Minecraft server running against OpenJDK 11

minecraft.service

[Unit]
Description=Minecraft Server
Wants=network.target
After=network.target

[Service]
User=minecraft
Nice=5
Restart=on-failure
SuccessExitStatus=0 143

ProtectSystem=full
PrivateDevices=true
NoNewPrivileges=true
PrivateTmp=true
InaccessiblePaths=/root /run/user /sys /srv /opt /media -/lost+found
ReadWritePaths=/home/minecraft
WorkingDirectory=/home/minecraft

ExecStart=/usr/bin/java -Xms1024M -Xmx2048M -jar server.jar --nogui
# mcrcon (>= v0.7.1) should be manually installed from <https://github.com/Tiiffi/mcrcon>.
ExecStop=/usr/local/bin/mcrcon \
                -s \
                -w 5 \
                -H 127.0.0.1 -P 25575 \
                -p 'YOUR_VERY_STRONG_RCON_PASSWORD' \
                "say Server is about to restart. See you soon !" \
                "stop"

[Install]
WantedBy=multi-user.target