==========crontab配置===============
#vi /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly
*/1 * * * * root /usr/bin/php /opt/openfiler/var/etc/snp_script.php >> /root/rec.ini
蓝色字体标注标识要添加的部分。
在每一行的开头有五个“*”号，分别表示分、时、日、月、星期。“*/1”表示每分钟执行一次。
所有路径必须为绝对路径。
===============php部分===================
#!/usr/bin/php
<?php
date_default_timezone_set('PRC');
$snp_date_rec=date("Y-m-d-H-i");
$now=explode("-",$snp_date_rec);
$snapshots_path="/opt/openfiler/var/www/htdocs/ipshot/etc/snapshots.xml";
$schedules_path="/opt/openfiler/var/www/htdocs/ipshot/etc/schedules.xml";
//print_r($now);
//=======DOM读取snapshot=========
$snp_xml=new DOMDocument('1.0');
$snp_xml->load($snapshots_path);
$snp_XMLDoc=$snp_xml->getElementsByTagName("snapshots")->item(0);
$snp_date=date("Y-m-d H:i:s");
$xml=new DOMDocument('1.0');
$xml->load($schedules_path);
$XMLDoc=$xml->getElementsByTagName("schedules")->item(0);
$isLast=false;
//========DOM读取XML========
$schedules=array();
$cou=0;
foreach($XMLDoc->getElementsByTagName("schedule") as $schedule){
$sch=array();
$sch["name"]=$schedule->getAttribute("name");
$sch["interval"]=$schedule->getAttribute("interval");
$sch["count"]=$schedule->getAttribute("count");
$sch["size"]=$schedule->getAttribute("size");
$cou1=0;
$sch_volumes=array();
foreach($schedule->getElementsByTagName("volume") as $sch_volume){
$last=$sch_volume->getAttribute("last");
if(empty($last)||$last==""){
global $isLast;
$last=$sch_volume->getAttribute("time");
$attr=$xml->createAttribute("last");
$attr->appendChild($xml->createTextNode($last));
$sch_volume->appendChild($attr);
$isLast=true;
$xml->save($schedules_path);
}
$sch_volumes[$cou1++]=array($sch_volume->nodeValue,$last,$sch_volume->getAttribute("vg"));
}
$sch["volumes"]=$sch_volumes;
$schedules[$cou++]=$sch;
}
foreach($schedules as $schedule){
$interval=explode(" ",$schedule["interval"]);
//print_r($interval);
switch($interval[1]){
case "min":
$in=4;
break;
case "hour":
$in=3;
break;
case "day":
$in=2;
break;
case "month";
$in=1;
break;
case "year":
$in=0;
break;
case "week";
$in=-1;
break;
}
print("Last:".($isLast?"yes":"no")."\n");
foreach($schedule["volumes"] as $volume){
$start_time=explode("-",$volume[1]);
if($in==-1){
if($isLast||($now[$in]-$start_time[$in]!=0&&($now[2]-$start_time[2])%(7*$interval[0])==0)){
shell_exec("/sbin/lvcreate -s -L ".$schedule["size"]." -n of.snapshot.".$volume[0].".autosn".$snp_date_rec." ".$volume[2]);
}
}
else if($isLast||($now[$in]-$start_time[$in]!=0&&($now[$in]-$start_time[$in])%$interval[0]==0)){
//print("\n".$interval[0].":\n");
$command="/sbin/lvcreate -s -L ".$schedule["size"]." -n of.snapshot.".$volume[0].".autosn".$snp_date_rec." /dev/".$volume[2]."/".$volume[0];
print $command;
$xpath=new DOMXPath($xml);
$query="/schedules/user/schedule[@name='".$schedule["name"]."']/volume[@vg='".$volume[2]."' and text()='".$volume[0]."']";
$node=$xpath->query($query)->item(0);
$node->setAttribute("last",$snp_date_rec);
$xml->save($schedules_path);
shell_exec($command);
$snp=$snp_xml->createElement("snapshot");
//print $snp_xml->saveXML();
$attr=$snp_xml->createAttribute("id");
$attr->appendChild($snp_xml->createTextNode("autosn".$snp_date_rec));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("lvname");
$attr->appendChild($snp_xml->createTextNode($volume[0]));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("vgname");
$attr->appendChild($snp_xml->createTextNode($volume[2]));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("share");
$attr->appendChild($snp_xml->createTextNode("no"));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("rotateid");
$attr->appendChild($snp_xml->createTextNode("100"));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("timestamp");
$attr->appendChild($snp_xml->createTextNode($snp_date));
$snp->appendChild($attr);
$attr=$snp_xml->createAttribute("size");
$attr->appendChild($snp_xml->createTextNode($schedule["size"]));
$snp->appendChild($attr);
$snp_XMLDoc->appendChild($snp);
print $snp_xml->saveXML();
}
//删除过期快照
$count=0;
foreach($snp_XMLDoc->getElementsByTagName("snapshot") as $snapshot){
if($volume[0]==$snapshot->getAttribute("lvname")&&$snapshot->getAttribute("rotateid")==100){
$count++;
}
}
//print "\n\n".$count.": ".$schedule["count"];
if($count>$schedule["count"]){
foreach($snp_XMLDoc->getElementsByTagName("snapshot") as $snapshot){
$snpname=$snapshot->getAttribute("id");
$lvname=$snapshot->getAttribute("lvname");
if($volume[0]==$lvname && $snapshot->getAttribute("rotateid")==100){
$command="/sbin/lvremove -f /dev/".$volume[2]."/of.snapshot.".$volume[0].".".$snpname;
print "\n".$command."\n";
shell_exec($command);
$snp_XMLDoc->removeChild($snapshot);
break;
}
}
}
}
}
$snp_xml->save($snapshots_path);
print("\n====================================== \n");
?>
==========XML部分============
snapshot.xml:
<?xml version="1.0"?>
<snapshots>
<snapshot id="autosn2010-11-09-01-17" lvname="mir1" vgname="ipshot-pool" share="no" rotateid="100" timestamp="2010-11-09 01:17:02 GMT"/>
</snapshots>
schedules.xml:
<?xml version="1.0"?>
<schedules>
<schedule name="test1" interval="1 min" count="4" size="10M">
<volume time="2010-11-08-11-35" vg="ipshot-pool">mir1</volume>
</schedule>
</schedules>
