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Added xeninfo.pl, a script for collecting statistics from Xen hosts using the

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Xen-API.  This also serves as a good example of the use of XML::RPC::Client
with the Xen-API.

By Ingard Mevåg <ingard [at] mevaag [dot] no>.

Signed-off-by: Ewan Mellor <ewan@xensource.com>
This commit is contained in:
Ewan Mellor committed 2007-05-16 23:12:16 +01:00
1 parent 5db09f22cb
commit 1b0a8bb57e
1 file changed
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tools/examples/xeninfo.pl
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#!/usr/bin/perl -w
#############################################################################################################
# #
# Developed by Ingard Mevåg @ Oslo University College, spring 2007 #
# ingard [at] mevaag [dot] no #
# #
# This work is licensed under the Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. #
# To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter #
# to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA. #
# #
#############################################################################################################
use strict;
# http://search.cpan.org/~rjray/RPC-XML-0.59/lib/RPC/XML/Client.pm
require RPC::XML;
require RPC::XML::Client;
# for debug purposes
#use Data::Dumper;
##### CONFIG ######
my %xenhosts = ("192.168.0.10" => {"port" => "9363"},
"192.168.0.11" => {"port" => "9363"},
"192.168.0.12" => {"port" => "9363"},
"192.168.0.13" => {"port" => "9363"});
##### CONFIG END ###
##### STATIC VARS #####
my %host_info;
#######################
sub apiconnect
{
foreach my $xenhost (keys %xenhosts)
{
my $xen = RPC::XML::Client->new("http://$xenhost:$xenhosts{$xenhost}{'port'}");
my $session = $xen->simple_request("session.login_with_password", "user","");
if (! $session)
{
print "Can't connect to $xenhost :(\n";
$xenhosts{$xenhost} = {'xen' => $xen, 'session' => ""};
}
else
{
$xenhosts{$xenhost} = {'xen' => $xen, 'session' => $session->{'Value'}};
print "Connected successfully to $xenhost..\n";
}
}
}
sub validate_response
{
my ($result_ref) = @_;
if ($result_ref->{'Status'} eq "Success")
{
return $result_ref->{'Value'};
}
else
{
# status = Failure !
# die ("xmlrpc failed! ErrorDescription: $result_ref->{'ErrorDescription'}[1] -> $result_ref->{'ErrorDescription'}[0]");
print "xmlrpc failed! ErrorDescription: $result_ref->{'ErrorDescription'}[1] -> $result_ref->{'ErrorDescription'}[0]\n";
}
}
sub get_host_cpu_utilisation
{
my ($xen, $session, $host_name, $host_ref) = @_;
my $host_cpu_ref = validate_response($xen->simple_request("host.get_host_CPUs", $session, $host_ref));
foreach (@$host_cpu_ref)
{
my $host_cpu_utilisation = validate_response($xen->simple_request("host_cpu.get_utilisation", $session, $_));
$host_info{$host_name}{'cpus'}{$_} = $host_cpu_utilisation;
print " CPUiNFO: $host_cpu_utilisation\n";
}
}
sub get_host_pif_utilisation
{
my ($xen, $session, $host_name, $host_ref) = @_;
# This method isnt implemented yet it seems so using PIF.get_all for now..
# This will break when xen is made cluster aware..
# my $host_pif_ref = validate_response($xen->simple_request("host.get_PIFs", $session, $host_ref));
my $host_pif_ref = validate_response($xen->simple_request("PIF.get_all", $session));
foreach (@$host_pif_ref)
{
my $host_pif_device = validate_response($xen->simple_request("PIF.get_device", $session, $_));
my $host_pif_metrics_ref = validate_response($xen->simple_request("PIF.get_metrics", $session, $_));
# Whats the best solution performancewise?
# Collecting stats from get_records, or pulling individually?
# my $host_pif_record = validate_response($xen->simple_request("PIF_metrics.get_record", $session, $host_pif_metrics_ref));
# my $host_pif_io_read = $host_pif_record->{'io_read_kbs'};
# my $host_pif_io_write = $host_pif_record->{'io_write_kbs'};
my $host_pif_io_read = validate_response($xen->simple_request("PIF_metrics.get_io_read_kbs", $session, $host_pif_metrics_ref));
my $host_pif_io_write = validate_response($xen->simple_request("PIF_metrics.get_io_write_kbs", $session, $host_pif_metrics_ref));
$host_info{$host_name}{'pifs'}{$host_pif_device} = {'read' => $host_pif_io_read, 'write' => $host_pif_io_write};
print " PiFiNFO: $host_pif_device READ: $host_pif_io_read - WRITE: $host_pif_io_write\n";
# $host_info{$host_name}{'pifs'}{$host_pif_device}{'read'} = $host_pif_io_read;
# $host_info{$host_name}{'pifs'}{$host_pif_device}{'write'} = $host_pif_io_write;
}
}
sub get_host_mem_utilisation
{
my ($xen, $session, $host_name, $host_ref) = @_;
my $host_metrics_ref = validate_response($xen->simple_request("host.get_metrics", $session, $host_ref));
my $host_mem_total = validate_response($xen->simple_request("host_metrics.get_memory_total", $session, $host_metrics_ref)) / 1024 / 1024;
my $host_mem_free = validate_response($xen->simple_request("host_metrics.get_memory_free", $session, $host_metrics_ref)) / 1024 / 1024;
$host_info{$host_name}{'memory'} = {'total' => $host_mem_total, 'free' => $host_mem_free};
print " MEMiNFO: Total: $host_mem_total MB - Free: $host_mem_free MB\n";
}
sub get_vm_mem_info
{
my ($xen, $session, $host_name, $vm_ref, $vm_name_label) = @_;
my $vm_mem_stat_max = validate_response($xen->simple_request("VM.get_memory_static_max",$session,$vm_ref));
my $vm_mem_stat_min = validate_response($xen->simple_request("VM.get_memory_static_min",$session,$vm_ref));
my $vm_mem_dyn_max = validate_response($xen->simple_request("VM.get_memory_dynamic_max",$session,$vm_ref));
my $vm_mem_dyn_min = validate_response($xen->simple_request("VM.get_memory_dynamic_min",$session,$vm_ref));
# not implemented yet.. We'll do this at the same time as getting cpu utilisation
# in the get_vm_metrics sub instead..
#my $vm_metrics_ref = validate_response($xen->simple_request("VM.get_metrics",$session,$vm_ref));
#my $vm_mem_actual = validate_response($xen->simple_request("VM_metrics.get_memory_actual",$session,$vm_metrics_ref));
$host_info{$host_name}{'vms'}{$vm_name_label}{'memory'} = {'static_max' => $vm_mem_stat_max,
'static_min' => $vm_mem_stat_min,
'dynamic_max' => $vm_mem_dyn_max,
'dynamic_min' => $vm_mem_dyn_min};
# xm list uses the dynamic min var as far as i can tell.. or?
# Lets print the memactual info instead of this... I'll do that in the get_vm_metrics sub instead..
# print " |- MEMiNFO: Dynamic Min: $vm_mem_dyn_min - Actually in use: $vm_mem_actual\n";
}
sub get_vm_metrics
{
my ($xen, $session, $host_name, $vm_ref, $vm_name_label) = @_;
my $vm_metrics_ref = validate_response($xen->simple_request("VM.get_metrics",$session,$vm_ref));
my %vm_vcpu_utilisation = %{validate_response($xen->simple_request("VM_metrics.get_vcpus_utilisation",$session,$vm_metrics_ref))};
for my $tempcpu (keys %vm_vcpu_utilisation)
{
print " |- CPUiNFO: $tempcpu - $vm_vcpu_utilisation{$tempcpu}\n";
$host_info{$host_name}{'vms'}{$vm_name_label}{'vcpus'} = {$tempcpu => $vm_vcpu_utilisation{$tempcpu}};
}
my $vm_mem_actual = validate_response($xen->simple_request("VM_metrics.get_memory_actual",$session,$vm_metrics_ref)) / 1024 / 1024;
$host_info{$host_name}{'vms'}{$vm_name_label}{'memory'}{'actual'} = "$vm_mem_actual";
print " |- MEMiNFO: Actually in use: $vm_mem_actual MB\n";
}
sub get_vm_vif_utilisation
{
my ($xen, $session, $host_name, $vm_ref, $vm_name_label) = @_;
my $vm_vifs = validate_response($xen->simple_request("VM.get_VIFs",$session,$vm_ref));
foreach (@$vm_vifs)
{
my $vif_device = validate_response($xen->simple_request("VIF.get_device",$session,$_));
my $vif_io_read = validate_response($xen->simple_request("VIF_metrics.get_io_read_kbs", $session, $_));
my $vif_io_write = validate_response($xen->simple_request("VIF_metrics.get_io_write_kbs", $session, $_));
$host_info{$host_name}{'vms'}{$vm_name_label}{'vifs'}{$vif_device} = {'read' => $vif_io_read, 'write' => $vif_io_write};
print " |- ViFiNFO: $vif_device READ: $vif_io_read - WRITE: $vif_io_write\n";
}
}
sub get_vm_vbd_utilisation
{
my ($xen, $session, $host_name, $vm_ref, $vm_name_label) = @_;
my $vm_vbds = validate_response($xen->simple_request("VM.get_VBDs",$session,$vm_ref));
foreach (@$vm_vbds)
{
my $vbd_device = validate_response($xen->simple_request("VBD.get_device",$session,$_));
my $vbd_io_read = validate_response($xen->simple_request("VBD_metrics.get_io_read_kbs", $session, $_));
my $vbd_io_write = validate_response($xen->simple_request("VBD_metrics.get_io_write_kbs", $session, $_));
$host_info{$host_name}{'vms'}{$vm_name_label}{'vbds'}{$vbd_device} = {'read' => $vbd_io_read, 'write' => $vbd_io_write};
print " |- VBDiNFO: $vbd_device READ: $vbd_io_read - WRITE: $vbd_io_write\n";
}
}
sub get_vm_type
{
my ($xen, $session, $host_name, $vm_ref, $vm_name_label) = @_;
# not running response through validate_response() here to stop it from crashing..
#
# api docs says if this (following) field is set, its a HVM domain.
my $vm_bootloader_results = $xen->simple_request("VM.get_HVM_boot_policy",$session,$vm_ref);
if ("$vm_bootloader_results->{'Status'}" eq "Success")
{
if ("$vm_bootloader_results->{'Value'}" ne "")
{
$host_info{$host_name}{'vms'}{$vm_name_label}{'type'} = "HVM";
}
else
{
$host_info{$host_name}{'vms'}{$vm_name_label}{'type'} = "PV";
}
}
else
{
# However, xen 3.0.4 doest support this part of the api, so afaik I can get the difference with:
my $vm_pv_kernel_results = $xen->simple_request("VM.get_PV_kernel",$session,$vm_ref);
# which is something like:
# 'PV_kernel': '/boot/vmlinuz-2.6.18-xen',
# or
# 'PV_kernel': '/usr/lib/xen/boot/hvmloader',
if ("$vm_pv_kernel_results->{'Value'}" =~ m/hvm/i)
{
$host_info{$host_name}{'vms'}{$vm_name_label}{'type'} = "HVM";
}
else
{
$host_info{$host_name}{'vms'}{$vm_name_label}{'type'} = "PV";
}
}
}
sub get_complete_info
{
my %all_vms;
foreach my $xenhost (sort keys %xenhosts)
{
next unless $xenhosts{$xenhost}{'session'};
my $xen = $xenhosts{$xenhost}{'xen'};
my $session = $xenhosts{$xenhost}{'session'};
print "_______________________\n## $xenhost ##\n-----------------------\n";
my $host_ref = validate_response($xen->simple_request("session.get_this_host", $session));
my $host_name = validate_response($xen->simple_request("host.get_name_label", $session, $host_ref));
$xenhosts{$xenhost}{'hostname'} = $host_name;
$host_info{$host_name}{'ip'} = $xenhost;
get_host_cpu_utilisation($xen, $session, $host_name, $host_ref);
get_host_mem_utilisation($xen, $session, $host_name, $host_ref);
get_host_pif_utilisation($xen, $session, $host_name, $host_ref);
my $all_vm_refs = validate_response($xen->simple_request("host.get_resident_VMs",$session, $host_ref));
foreach my $vm_ref (@$all_vm_refs)
{
my $vm_name_label = validate_response($xen->simple_request("VM.get_name_label",$session,$vm_ref));
get_vm_type($xen,$session,$host_name,$vm_ref,$vm_name_label);
my $vm_id = validate_response($xen->simple_request("VM.get_domid",$session,$vm_ref));
print "vm: $vm_id\t$vm_name_label\ttype: $host_info{$host_name}{'vms'}->{$vm_name_label}{'type'}\n";
# vm_metrics includes both mem_actual & cpu utilisation
# So we'll add all stats found in that class in one go..
get_vm_metrics($xen,$session,$host_name,$vm_ref,$vm_name_label);
# get_vm_cpu_utilisation($xen,$session,$host_name,$vm_ref,$vm_name_label);
# all other mem stats are added seperately..
# This might not be needed at all as xen doesnt have functionality to
# resize mem for a VM atm (afaik)
get_vm_mem_info($xen,$session,$host_name,$vm_ref,$vm_name_label);
get_vm_vif_utilisation($xen,$session,$host_name,$vm_ref,$vm_name_label);
get_vm_vbd_utilisation($xen,$session,$host_name,$vm_ref,$vm_name_label);
$all_vms{$vm_name_label} = "" unless ("$vm_name_label" eq "Domain-0");
}
print "\n";
}
# Debug: Uncomment to see the nested datastructure..
#print Dumper(%host_info);
}
apiconnect();
get_complete_info();
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