查看集群节点api

[elk@node01 api]$ curl  http://192.168.137.2:9200/_cat/nodes?v
host          ip            heap.percent ram.percent load node.role master name   
192.168.137.2 192.168.137.2           13          64 0.00 d         *      node01 


[elk@node01 api]$ cat a2.pl 
use  LWP::UserAgent;   
my $ua = LWP::UserAgent->new;  
$ua->timeout(10);  
$ua->env_proxy;  
$ua->agent("Mozilla/8.0");  
my $host = "http://192.168.137.2:9200/_cat/nodes?v";  
my $response = $ua->get($host);  
   $ua->default_headers;  
  if ($response->is_success) {  
      print $response->decoded_content;  # or whatever  
   }  
    else {  
    die $response->status_line;  
} 
[elk@node01 api]$ perl a2.pl 
host          ip            heap.percent ram.percent load node.role master name   
192.168.137.2 192.168.137.2            8          65 0.00 d         *      node01