脚本名：monitor_port.pl
作用：扫描特定端口是否正常
脚本：
#!/usr/bin/env perl
($sec,$min,$hour,$mday,$mon,$year) = (localtime)[0..5];
($sec,$year) = (
sprintf("%02d", $sec), sprintf("%02d", $min), $hour), $mday), $mon + 1), $year + 1900
);
$date="$year-$mon-$mday $hour:$min:$sec";
##########################################################
open (FH,"/opt/monitor/port.list") || die;
while (defined($port_tn=<FH>)) {
($host_ip,$mod_n,$port_t,$port_n)=split(/\t/,$port_tn);
chomp $host_ip;
chomp $mod_n;
chomp $port_t;
chomp $port_n;
ch_result();
}
####################################################
sub ch_result {
open LOG,">>/opt/monitor/port_status.log";
select LOG;
if($port_t eq 'tcp'){
`/usr/bin/nc -z -w2 $host_ip $port_n`;
$flag = `echo $?`;
}else{
`/usr/bin/nc -u -z -w2 $host_ip $port_n`;
$flag = `echo $?`;
}
###########################
if($flag != 0){
print "$date $host_ip $mod_n $port_t $port_n is closed!\n";
}
close(LOG);
}
eg:
172.16.2.2 httpd tcp 80 172.16.2.2 tomcat tcp 8080
文件2、port_status.log 记录端口失败信息
eg:
2014-11-25 20:30:01 172.16.2.2 httpd tcp 80 is closed! 2014-11-25 20:30:01 172.16.2.2 tomcat tcp 8080 is closed!
使用方法：
只要将此脚本添加到crontab即可！
*/5 * * * * cd /opt/monitor; ./monitor_port.pl > /dev/null 2>&1