Minecraft systemd files

.envrc

#-- Put your environment variable overrides here!

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[Unit]
#-- Unit metadata
Description=Minecraft Server (%i)

#-- Dependencies
After=network-online.target
Wants=network-online.target

[Service]
#-- Service type
Type=simple

#-- Restart on failure
Restart=on-abnormal

#-- JVM returns exit code 143 on SIGTERM, silly thing
SuccessExitStatus=143

#-- Wait 3 seconds before restarting
RestartSec=3s

#-- Limit to a maximum of 3 restarts per day
StartLimitInterval=1d
StartLimitBurst=3

#-- User and group
User=minecraft
Group=minecraft

#-- Define I/O
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StandardInput=socket
StandardOutput=journal
StandardError=journal

#-- Directories
RuntimeDirectory=minecraft
RuntimeDirectoryMode=0775
RuntimeDirectoryPreserve=no
WorkingDirectory=/mnt/minecraft-data/%i

#-- Protect various system parameters
ProtectSystem=full
ProtectHome=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectControlGroups=true

#-- Timeout settings
TimeoutStopSec=70

#-- Default environment variables
Environment=JAVA_ARGS=
Environment=MC_SERVER_JAR=
Environment=MC_ARGS=nogui
Environment=MC_RAM_MIN=8G
Environment=MC_RAM_MAX=8G
Environment=MC_STOP_BEFORE_SAVE_DELAY=10
Environment=MC_STOP_AFTER_SAVE_DELAY=5
Environment=MC_FINAL_STOP_DELAY=3

#-- Environment file
EnvironmentFile=-/mnt/minecraft-data/%i/.envrc

#-- Startup command(s)
ExecStart=/mnt/minecraft-data/%i/startMinecraftServer.sh

#-- Reload command(s)
ExecReload=echo "/reload" > /run/minecraft/%i.stdin

#-- Stop command(s)
ExecStop=/bin/sh -c 'echo "/say Server is preparing to shut down!" > /run/minecraft/%i.stdin'
ExecStop=/bin/sh -c 'echo "/say Saving the world in ${MC_STOP_BEFORE_SAVE_DELAY} seconds..." > /run/minecraft/%i.stdin'
ExecStop=sleep ${MC_STOP_BEFORE_SAVE_DELAY}
ExecStop=/bin/sh -c 'echo "/say Saving the world!" > /run/minecraft/%i.stdin'
ExecStop=/bin/sh -c 'echo "/save-all" > /run/minecraft/%i.stdin'
ExecStop=/bin/sh -c 'echo "/say World saved! Shutting down in ${MC_STOP_AFTER_SAVE_DELAY} seconds..." > /run/minecraft/%i.stdin'
ExecStop=sleep ${MC_STOP_AFTER_SAVE_DELAY}
ExecStop=/bin/sh -c 'echo "/say Shutting down! Good bye!" > /run/minecraft/%i.stdin'
ExecStop=sleep ${MC_FINAL_STOP_DELAY}
ExecStop=/bin/sh -c 'echo "/stop" > /run/minecraft/%i.stdin'

[Install]
WantedBy=multi-user.target

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[Unit]
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[Socket]
#-- User and group
SocketUser=minecraft
SocketGroup=minecraft

#-- The mode to create the FIFO node in
SocketMode=0665

#-- Define standard input socket
ListenFIFO=%t/minecraft/%i.stdin

#-- Remove when the parent service stops
RemoveOnStop=true

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[Unit]
#-- Unit metadata
Description=Restart the %i Minecraft server daily.

#-- Dependencies
Requisite=minecraft@%i.service

[Service]
#-- Service type
Type=oneshot

#-- Timeout settings
TimeoutStartSec=90

#-- Startup command(s)
ExecStart=/usr/bin/systemctl try-restart minecraft@%i.service

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[Unit]
#-- Unit metadata
Description=Restart the %i Minecraft server daily.

[Timer]
#-- The calendar time to restart at (optionally add a time zone)
OnCalendar=*-*-* 00:00:00

#-- Persist next restart time to disk
Persistent=true

[Install]
WantedBy=timers.target

startMinecraftServer.sh

#!/usr/bin/env bash
exec java -Xms${MC_RAM_MIN} -Xmx${MC_RAM_MAX} ${JAVA_ARGS} -jar "$(find . -maxdepth 1 -iname "${MC_SERVER_JAR}" | head -n1)" ${MC_ARGS}