keepalived 监测域名解析脚本

v-dev-redis01:/root# cat a1.pl 
sub check_dns{
 use  LWP::UserAgent;  
use Net::Ping;
$web = shift;
 $p = Net::Ping->new("icmp");
  if ($p->ping($web,2)){   
return 1;
}  
else {  
return 0;
}} ;

$var=&check_dns("$ARGV[0]"); 
print "$var\n";
v-dev-redis01:/root# perl a1.pl  www.zjtest.com
1

       If a default timeout ($def_timeout) in seconds is provided, it is used when a timeout is not given to the ping() method (below).  The timeout must be greater than 0 and the default, if
           not specified, is 5 seconds.