#!/bin/bash
# 监视$LOGPATH目录中的新文件，并将它们的内容输出到容器的标准输出
# $LOGPATH需要在pod中设置环境变量
lastfile=""
inotifywait -mrq -e 'modify,moved_from,delete' $LOGPATH | while read path action file; do
  file_pid=$(ps -ef|grep "$path$file$"|grep -v grep|awk '{print $1}')
  # 添加新文件到tail遍历
  if [[ "$action" == MODIFY ]] && [ -f "$path$file" ] && [ -z "$file_pid" ] && [[ "$lastfile" != "$path$file" ]]; then
    lastfile=$(echo $path$file|grep "log$")
    if [ -n "$lastfile" ]; then
      tail -F -n+1 "$lastfile" &
    fi
  # 清理已删除的文件tail进程
  elif [[ "$action" == MOVED_FROM ]] || [[ "$action" == DELETE ]]; then
    kill -9 "$file_pid"
  fi
done
# 等待子进程退出以保持容器运行
wait