设置开机自启动之后通过死循环保证运行
如何创建文件并设置自启动可以查看下面的链接
Ubuntu/Linux脚本创建方法
创建名为MC的screen，让mc后台运行
每次循环都检测screen是否存在，以及游戏进程java是否存在
如果上述两个不存在则尝试启动
如果存在之后则每次通过/list命令获取在线人数，使用count.log计算 “有几次检测到在线玩家为0”
当这个数量达到了MAX_COUNT，则备份、关闭游戏、重启服务器
重启之后该值会超过max，不再触发重启，直到有人进入将count.log的值更新为0
当服务器有人时，会因为count.lot值未更新而更新一次starttime，之后starttime保持不变，每当运行时间超过20000秒，则进行一次备份，不会导致游戏重启
#!/usr/bin/bash
PROCESS_NAME="java"
BACKUP_NAME="tar"
SCREEN_NAME="MC"
LOG_FILE="/root/NFWC/logs/latest.log"
FLAG_FILE="/root/auto_file.log"
COUNT_FILE="/root/count.log"
MAX_COUNT=5
GAME_PATH="/root/NFWC"
LOCK_FILE="/root/LOCK.log"
BACKUP_FILE="/data/backup"
MAX_BACKUP=2
BACKUP_TIME=20000
back_up()
{
file_count=$(ls -1 $BACKUP_FILE | wc -l)
if [ $file_count -gt $MAX_BACKUP ]; then #删除过旧的备份
num=$(expr $file_count - $MAX_BACKUP)
ls -tr "$BACKUP_FILE" | head -$num | xargs -i -n1 rm "$BACKUP_FILE/{}"
fi
screen -S "$SCREEN_NAME" -X stuff "/say starting backup...\n"
echo "[$(date '+%Y-%m-%d %H:%M:%S')] starting backup..."
screen -S "$SCREEN_NAME" -X stuff "/save-off\n"
screen -S "$SCREEN_NAME" -X stuff "/save-all\n"
tar -cf /data/backup/$(date +%Y%m%d_%H%M%S).tar.gz /root/NFWC/world
while pgrep -x "$BACKUP_NAME" > /dev/null; do
sleep 1
done
screen -S "$SCREEN_NAME" -X stuff "/save-on\n"
screen -S "$SCREEN_NAME" -X stuff "/say Successful backup\n"
echo "[$(date '+%Y-%m-%d %H:%M:%S')] successful backup"
}
start_time=$(date +%s) > /dev/null 2>&1
while true;do
#检测计数器
if [ ! -f "$COUNT_FILE" ];then
echo 0 >"$COUNT_FILE"
fi
count=$(cat "$COUNT_FILE")
#检查screen
screen -wipe > /dev/null 2>&1
if ! screen -list | grep -q "\.${SCREEN_NAME}" > /dev/null 2>&1 ; then
echo "There is not $SCREEN_NAME. Try to create..."
screen -dmS "$SCREEN_NAME" /bin/bash -l > /dev/null 2>&1
while ! screen -list | grep -q "\.${SCREEN_NAME}"; do
sleep 1
done
echo "screen $SCREEN_NAME run successfully"
screen -S "$SCREEN_NAME" -X stuff "cd $GAME_PATH\n"
sleep 1
fi
#检查游戏进程
while ! pgrep -x "$PROCESS_NAME" > /dev/null ;do
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Try to start..."
screen -S $SCREEN_NAME -X stuff "sh /root/NFWC/run.sh\n"
sleep 60
if pgrep -x "$PROCESS_NAME" > /dev/null;then
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Start Success. Welcome!"
fi
done
screen -S $SCREEN_NAME -X stuff "/list\n"
sleep 2
#读取log，获取玩家数量
latest_output=$(tail -n 1 $LOG_FILE)
number_of_player=$(echo "$latest_output" | grep -oP 'There are \K[0-9]+' )
#检查玩家数量
if [ -z "$number_of_player" ];then
echo "[$(date '+%Y-%m-%d %H:%M:%S')] No number found in log output"
else
#检测0
if [ "$number_of_player" -eq "0" ];then
let count=count+1
echo "$count" > "$COUNT_FILE"
if [ "$count" -eq "$MAX_COUNT" ];then
back_up
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Stop the game."
screen -S "$SCREEN_NAME" -X stuff "stop\n"
while pgrep -x "$PROCESS_NAME" > /dev/null; do
sleep 5
done
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Stop the screen."
screen -S "$SCREEN_NAME" -X quit
sleep 2
sudo reboot
fi
else
if [ $count -ne "0" ];then
start_time=$(date +%s) > /dev/null 2>&1
fi
end_time=$(date +%s) > /dev/null 2>&1
cost_time=$(( end_time - start_time)) > /dev/null 2>&1
if [ "$cost_time" -ge "$BACKUP_TIME" ] ; then
start_time=$(date +%s) > /dev/null 2>&1
back_up
fi
#更新count
count=0
echo "$count" > "$COUNT_FILE"
sleep 60
fi
fi
sleep 60
done