程序调用远端服务，为了确保可用性最好在使用前进行健康检测，将异常的服务排除。

复制代码 代码如下:
#!/usr/bin/perl

#

use strict;

use IO::Socket;

my @servers;

$servers[0]=['180.153.100.93',2222];

$servers[1]=['180.153.100.93',22];

$servers[2]=['180.153.100.93',80];

my $i=0;

my $interval=3;

my $count=int(60/$interval);

while($i < $count){

foreach (@servers){

if(fetch_server_status(@$_)){

print $$_[0] . ':' . $$_[1] ."ok\n";

}else{

print $$_[0] . ':' . $$_[1] ."bad\n";

}

}

$i++;

sleep $interval;

}

sub fetch_server_status(){

my($ip,$port)=@_;

my $socket=IO::Socket::INET->new(

PeerAddr => $ip,

PeerPort => $port,

Timeout => 1,

);

if(!$socket){

return 0;

}else{

return 1;

}

$socket->close;

}