294 lines
8.4 KiB
Bash
Executable File
294 lines
8.4 KiB
Bash
Executable File
#!/bin/bash
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source /etc/conf.d/minecraft || echo "Could not source /etc/conf.d/minecraft"
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# General rule for the variable-naming-schema:
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# Variables in capital letters may be passed through the command line others not.
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# You may use this script for any minecraft server of your choice, just alter the config file
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SERVER_ROOT="${SERVER_ROOT:-/srv/minecraft}"
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BACKUPPATH="${BACKUPPATH:-/srv/minecraft/backup}"
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LOGPATH="${LOGPATH:-/srv/minecraft/logs}"
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WORLDPATHS="${WORLDPATHS:-world}"
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KEEP_BACKUPS="${KEEP_BACKUPS:-10}"
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MC_USER="${MC_USER:-minecraft}"
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MAIN_JAR="${MAIN_JAR:-minecraft_server.jar}"
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SESSION_NAME="${SESSION_NAME:-minecraft}"
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# Specify system parameters for the minecraft server
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MINHEAP="${MINHEAP:-512M}"
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MAXHEAP="${MAXHEAP:-1024M}"
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THREADS="${THREADS:-1}"
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JAVA_PARMS="${JAVA_PARMS:-"-Xmx${MAXHEAP} -Xms${MINHEAP} -XX:ParallelGCThreads=${THREADS}"}"
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# The actual program name
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declare -r myname="minecraftd"
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# Check whether sudo is needed at all
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if [[ $(whoami) == ${MC_USER} ]]; then
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SUDO_CMD=""
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else
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SUDO_CMD="sudo -u ${MC_USER}"
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fi
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# Check for sudo rigths
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if [[ $(${SUDO_CMD} whoami) != ${MC_USER} ]]; then
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echo -e "You have \e[39;1mno permission\e[0m to run commands as $MC_USER user."
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exit 1
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fi
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# Pipe any given argument to the minecraft server console
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mc_command() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -X stuff "`printf \"$*\r\"`"
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}
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# Start the server if it is not already running
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server_start() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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echo "A screen ${SESSION_NAME} session is already running. Please close it first."
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else
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echo -en "Starting server... "
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${SUDO_CMD} screen -dmS "${SESSION_NAME}" /bin/bash -c "cd '${SERVER_ROOT}'; java ${JAVA_PARMS} -jar '${SERVER_ROOT}/${MAIN_JAR}' nogui"
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echo -e "\e[39;1m done\e[0m"
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fi
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}
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# Stop the server gracefully by saving everything prior and warning the users
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server_stop() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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mc_command save-all
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mc_command say "Server is going down in 10 seconds! HURRY UP WITH WATHEVER YOU ARE DOING!" # Warning the users
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echo -en "Server is going down in... "
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for i in $(seq 1 10); do
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mc_command say "down in... $(expr 10 - $i)"
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echo -n " $(expr 10 - $i)"
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sleep 1
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done
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mc_command stop
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echo -e "\e[39;1m done\e[0m"
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else
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echo "The corresponding screen session for ${SESSION_NAME} was already dead."
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fi
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}
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# Print whether the server is running and if so give some information about memory usage and threads
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server_status() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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echo -e "Status:\e[39;1m running\e[0m"
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# Calculating memory usage
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for p in $(${SUDO_CMD} pgrep -f "${MAIN_JAR}"); do
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ps -p${p} -O rss | tail -n1;
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done | gawk '{ count ++; sum += $2 }; END {count --; print "Number of processes =", count, "(screen, bash,", count-2, "x java)"; print "Total memory usage =", sum/1024, "MB" ;};'
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else
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echo -e "Status:\e[39;1m stopped\e[0m"
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fi
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}
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# Restart the complete server by shutting it down and starting it again
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server_restart() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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server_stop
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sleep 0.1
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server_start
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else
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server_start
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fi
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}
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# Backup the directories specified in $WORLDPATHS
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backup_files() {
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# Check for the availability of the tar binaries
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which tar &> /dev/null
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if [[ $? -ne 0 ]]; then
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echo "The tar binaries are needed for a backup."
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exit 2
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fi
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echo "Starting backup..."
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FILE="$(date +%Y_%m_%d_%H.%M.%S).tar.gz"
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${SUDO_CMD} mkdir -p "${BACKUPPATH}"
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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mc_command save-off
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mc_command save-all
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sync && wait
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${SUDO_CMD} tar -C "${SERVER_ROOT}" -czf "${BACKUPPATH}/${FILE}" --totals "${WORLDPATHS}" 2>&1 | grep -v "tar: Removing leading "
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mc_command save-on
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else
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${SUDO_CMD} tar -C "${SERVER_ROOT}" -czf "${BACKUPPATH}/${FILE}" --totals "${WORLDPATHS}" 2>&1 | grep -v "tar: Removing leading "
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fi
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echo -e "\e[39;1mbackup completed\e[0m\n"
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echo -n "Only keeping the last ${KEEP_BACKUPS} backups and removing the other ones..."
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BACKUP_COUNT=$(for f in "${BACKUPPATH}"/[0-9_.]*; do echo ${f}; done | wc -l)
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if [[ $(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}) -gt 0 ]]; then
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${SUDO_CMD} rm $(for f in "${BACKUPPATH}"/[0-9_.]*; do echo ${f}; done | head -n$(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}))
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echo -e "\e[39;1m done\e[0m ($(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}) backup(s) pruned)"
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else
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echo -e "\e[39;1m done\e[0m (no backups pruned)"
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fi
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}
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# Restore backup
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backup_restore() {
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# Check for the availability of the tar binaries
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which tar &> /dev/null
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if [[ $? -ne 0 ]]; then
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echo "The tar binaries are needed for a backup."
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exit 2
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fi
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# Only allow the user to restore a backup if the server is down
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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echo -e "The \e[39;1mserver should be down\e[0m in order to restore the world data."
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exit 3
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fi
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# Either let the user choose a backup or expect one as an argument
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if [[ $# -lt 1 ]]; then
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echo "Please enter the corresponding number for the backup to be restored: "
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i=1
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for f in "${BACKUPPATH}"/[0-9_.]*; do
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echo -e " \e[39;1m$i)\e[0m\t$f"
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i=$((i+1))
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done
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echo -en "Restore backup number: "
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# Read in user input
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read user_choice
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# Interpeting the input
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if [[ $user_choice =~ ^-?[0-9]+$ ]]; then
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n=1
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for f in "${BACKUPPATH}"/[0-9_.]*; do
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[[ ${n} -eq $user_choice ]] && FILE="$f"
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n=$((n+1))
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done
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if [[ -z $FILE ]]; then
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echo -e "\e[39;1mFailed\e[0m to interpret your input. Please enter the digit of the presented options."
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exit 5
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fi
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else
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echo -e "\e[39;1mFailed\e[0m to interpret your input. Please enter a valid digit for one of the presented options."
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exit 6
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fi
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elif [[ $# -eq 1 ]]; then
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# Check for the existance of the specified file
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if [[ -f "$1" ]]; then
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FILE="$1"
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else
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if [[ -f "${BACKUPPATH}"/"$1" ]]; then
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FILE="${BACKUPPATH}"/"$1"
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else
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echo -e "Sorry, but '$1', is \e[39;1mnot a valid file\e[0m, neither in your current directory nor in the backup folder."
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exit 4
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fi
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fi
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elif [[ $# -gt 1 ]]; then
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echo -e "\e[39;1mToo many arguments.\e[0m Please pass only the filename for the world data as an argument."
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echo "Or alternatively no arguments at all to chose from a list of available backups."
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exit 1
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fi
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echo "Restoring backup..."
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${SUDO_CMD} tar -xf "${FILE}" -C "${SERVER_ROOT}" 2>&1
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if [[ $? -eq 0 ]]; then
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echo -e "\e[39;1mRestoration completed\e[0m"
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else
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echo -e "\e[39;1mFailed to restore backup.\e[0m"
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fi
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}
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# Run the given comman at the minecraft server console
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server_command() {
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if [[ $# -lt 1 ]]; then
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echo "No server command specified. Try 'help' for a list of commands."
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exit 1
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fi
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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sleep 0.1s &
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sleep_pid=$!
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mc_command "$@" &
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tail -f --pid=${sleep_pid} -n 0 "${LOGPATH}/latest.log"
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else
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echo "There is no ${SESSION_NAME} session to connect to."
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fi
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}
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# Enter the screen minecraft session
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server_console() {
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${SUDO_CMD} screen -S "${SESSION_NAME}" -Q select . > /dev/null
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if [[ $? -eq 0 ]]; then
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${SUDO_CMD} screen -S "${SESSION_NAME}" -rx
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else
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echo "There is no ${SESSION_NAME} session to connect to."
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fi
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}
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# Help function, no arguments required
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help() {
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cat <<-EOF
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This script was design to easily control any minecraft server. Quite every parameter for a given
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minecraft server derivative can be altered by editing the variables in the configuration file.
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Usage: $myname {start|stop|status|backup|restore|command <command>|console}
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start Start the minecraft server
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stop Stop the minecraft server
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restart Restart the minecraft server
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status Print some status information
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backup Backup the world data
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restore [filename] Restore the world data from a backup
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command <command> Run the given comman at the minecraft server console
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console Enter the server console through a screen session
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Copyright (c) Gordian Edenhofer <gordian.edenhofer@gmail.com>
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EOF
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}
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case "$1" in
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start)
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server_start
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;;
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stop)
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server_stop
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;;
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status)
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server_status
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;;
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restart)
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server_restart
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;;
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console)
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server_console
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;;
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command)
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server_command "${@:2}"
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;;
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backup)
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backup_files
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;;
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restore)
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backup_restore "${@:2}"
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;;
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*|-h|--help)
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help
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esac
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exit 0
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