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#!/bin/bash
# -------------------------------
# Revision: 
# Date:        2012-12-11
# Author:      simonzhang
# Email:       simon-zzm@163.com
# Web:         www.simonzhang.net
# ------------------------------- 

# base value
# 要同步的源
YUM_SITE='rsync://mirrors.sohu.com/centos/'
# 本地存放目录
LOCAL_PATH='/u01/mirrors/centos/'
# 需要同步的版本，我只需要5和6版本的
LOCAL_VER='5 5* 6 6'
# 同步时要限制的带宽
BW_limit=512
# 记录本脚本进程号
LOCK_FILE='/var/log/yum_server.pid'
# 如用系统默认rsync工具为空即可。
# 如用自己安装的rsync工具直接填写完整路径
RSYNC_PATH=''

# check update yum server  pid
MY_PID=$$
if [ -f $LOCK_FILE ]; then
    get_pid=`/bin/cat $LOCK_FILE`
    get_system_pid=`/bin/ps -ef|grep -v grep|grep $get_pid|wc -l`
    if [ $get_system_pid -eq 0] ; then
        echo $MY_PID>$LOCK_FILE
    else
        echo 'Have update yum server now!'
        exit 1
    fi
else
    echo $MY_PID>$LOCK_FILE
fi

# check rsync tool
if [ -z $RSYNC_PATH ]; then
    RSYNC_PATH=`/usr/bin/whereis rsync|awk ' ''{print $2}'`
    if [ -z $RSYNC_PATH ]; then
        echo 'Not find rsync tool.'
        echo 'use comm: yum install -y rsync'
    fi
fi

# sync yum source
for VER in $LOCAL_VER;
do 
    # Check whether there are local directory
    if [ ! -d "$LOCAL_PATH$VER" ] ; then
        echo "Create dir $LOCAL_PATH$VER"
        `/bin/mkdir -p $LOCAL_PATH$VER`
    fi
    # sync yum source
    echo "Start sync $LOCAL_PATH$VER"
    $RSYNC_PATH -avrtH --delete --bwlimit=$BW_limit --exclude "isos" $YUM_SITE$VER $LOCAL_PATH$VER
done

# clean lock file
`/bin/rm -rf $LOCK_FILE`

echo "sync end."
exit 1