mirror of
https://github.com/xcp-ng/xenadmin.git
synced 2024-12-20 23:46:03 +01:00
434 lines
15 KiB
C#
Executable File
434 lines
15 KiB
C#
Executable File
/* Copyright (c) Citrix Systems Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms,
|
|
* with or without modification, are permitted provided
|
|
* that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the
|
|
* following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the
|
|
* following disclaimer in the documentation and/or other
|
|
* materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
using System;
|
|
using System.Collections.Concurrent;
|
|
using System.Collections.Generic;
|
|
using System.Threading;
|
|
using System.IO;
|
|
using System.Xml;
|
|
|
|
using Citrix.XenCenter;
|
|
using XenAPI;
|
|
|
|
using XenAdmin.Core;
|
|
using System.Threading.Tasks;
|
|
using System.Linq;
|
|
|
|
namespace XenAdmin.XenSearch
|
|
{
|
|
public class MetricUpdater
|
|
{
|
|
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
|
|
private const int _sleep = 30000;
|
|
|
|
private bool _run;
|
|
private readonly object _pauseMonitor = new object();
|
|
private bool _pause;
|
|
private readonly object _sleepMonitor = new object();
|
|
private bool _skip_sleep;
|
|
|
|
private readonly Thread _metricUpdaterThread;
|
|
|
|
private readonly object _hostsLock = new object();
|
|
private ConcurrentDictionary<Host, HostMetric> _hosts = new ConcurrentDictionary<Host, HostMetric>();
|
|
|
|
public event EventHandler MetricsUpdated;
|
|
|
|
public MetricUpdater()
|
|
{
|
|
_metricUpdaterThread = new Thread(UpdateMetrics) {IsBackground = true, Name = "MetricUpdater"};
|
|
}
|
|
|
|
/// <summary>
|
|
/// start or resume thread
|
|
/// </summary>
|
|
public void Start()
|
|
{
|
|
_run = true;
|
|
_pause = false;
|
|
_skip_sleep = true;
|
|
if ((_metricUpdaterThread.ThreadState & ThreadState.Unstarted) > 0)
|
|
{
|
|
log.Info("Starting MetricUpdater thread");
|
|
_metricUpdaterThread.Start();
|
|
}
|
|
else
|
|
{
|
|
lock (_pauseMonitor)
|
|
Monitor.PulseAll(_pauseMonitor);
|
|
}
|
|
}
|
|
|
|
public void Pause()
|
|
{
|
|
_pause = true;
|
|
lock (_sleepMonitor)
|
|
Monitor.PulseAll(_sleepMonitor);
|
|
}
|
|
|
|
public void Kill()
|
|
{
|
|
log.Info("Killing MetricUpdater thread");
|
|
_run = false;
|
|
_pause = false;
|
|
lock (_pauseMonitor)
|
|
Monitor.PulseAll(_pauseMonitor);
|
|
lock (_sleepMonitor)
|
|
Monitor.PulseAll(_sleepMonitor);
|
|
}
|
|
|
|
private void UpdateMetrics()
|
|
{
|
|
while (_run)
|
|
{
|
|
// We work on the current list, at the time each update pulse begins.
|
|
// Sometimes _hosts can be changed by SetXenModelObjects while we're updating,
|
|
// but that's OK: we've done an unnecessary update of a data structure that's
|
|
// about to go away, but we'll populate the new structure soon.
|
|
ConcurrentDictionary<Host, HostMetric> hosts;
|
|
|
|
lock (_hostsLock)
|
|
{
|
|
hosts = _hosts;
|
|
}
|
|
|
|
Parallel.ForEach(hosts.Keys.Where(h => h.Connection.IsConnected),
|
|
host =>
|
|
{
|
|
HostMetric hm;
|
|
//Intentionally using TryGetValue (instead of indexer's getter), because there is a slight chance 'host' is not in 'hosts.Keys' anymore.
|
|
//This means that metrics of such 'host' can be ignored safely (no else implemented below).
|
|
if (hosts.TryGetValue(host, out hm))
|
|
{
|
|
var values = ValuesFor(host);
|
|
DistributeValues(values, hm);
|
|
}
|
|
});
|
|
|
|
OnMetricsUpdate(EventArgs.Empty);
|
|
|
|
if (_pause)
|
|
{
|
|
lock (_pauseMonitor)
|
|
Monitor.Wait(_pauseMonitor);
|
|
}
|
|
else if (!_skip_sleep)
|
|
{
|
|
lock (_sleepMonitor)
|
|
Monitor.Wait(_sleepMonitor, _sleep);
|
|
}
|
|
_skip_sleep = false;
|
|
}
|
|
}
|
|
|
|
private static void DistributeValues(Dictionary<string, double> value, HostMetric host)
|
|
{
|
|
foreach (KeyValuePair<string, double> kvp in value)
|
|
{
|
|
string[] bits = kvp.Key.Split(':');
|
|
if (bits.Length < 4)
|
|
continue;
|
|
|
|
double currentValue = kvp.Value;
|
|
string key = GetSetName(kvp.Key);
|
|
|
|
if (bits[1].ToLowerInvariant() == "host")
|
|
{
|
|
host.Values[key] = currentValue;
|
|
}
|
|
else
|
|
{
|
|
VmMetric vm = host.GetVmByUuid(bits[2]);
|
|
if (vm == null)
|
|
continue;
|
|
vm.Values[key] = currentValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static Dictionary<string, double> ValuesFor(Host host)
|
|
{
|
|
if (host.address == null)
|
|
return new Dictionary<string, double>();
|
|
|
|
try
|
|
{
|
|
Session session = host.Connection.Session;
|
|
if (session != null)
|
|
return AllValues(HTTPHelper.GET(GetUri(session, host), host.Connection, true, false));
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
log.Warn(string.Format("Exception getting metrics for {0}", Helpers.GetName(host)), e);
|
|
}
|
|
return new Dictionary<string, double>();
|
|
}
|
|
|
|
private static Dictionary<string, double> AllValues(Stream httpstream)
|
|
{
|
|
var result = new Dictionary<string, double>();
|
|
var keys = new List<string>();
|
|
|
|
using (var reader = XmlReader.Create(httpstream))
|
|
{
|
|
string lastnode = "";
|
|
int lastkey = 0;
|
|
|
|
while (reader.Read())
|
|
{
|
|
if (reader.NodeType == XmlNodeType.Element)
|
|
{
|
|
lastnode = reader.Name;
|
|
if (lastnode == "row")
|
|
lastkey = 0;
|
|
}
|
|
|
|
if (reader.NodeType != XmlNodeType.Text)
|
|
continue;
|
|
|
|
if (lastnode == "entry")
|
|
keys.Add(reader.ReadContentAsString());
|
|
|
|
if (lastnode == "v")
|
|
{
|
|
result[keys[lastkey]] = Helpers.StringToDouble(reader.ReadContentAsString());
|
|
lastkey++;
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
public void SetXenObjects(IXenObject[] objects)
|
|
{
|
|
InvokeHelper.AssertOnEventThread();
|
|
|
|
// The QueryPanel can trigger this too often (sometimes more than once when we switch to it).
|
|
// So we do a preliminary check of whether any changes will be needed to the data structures.
|
|
// Without this, we wipe out the stats, and can sometimes then display them before they've been
|
|
// repopulated. This check used to be at the end of this function, just before _hosts = hosts,
|
|
// but it's cheaper to do it up front, at the expense of some code duplication.
|
|
|
|
if (!AnyNewObjects(objects))
|
|
return;
|
|
|
|
var hosts = new ConcurrentDictionary<Host, HostMetric>();
|
|
|
|
// Create HostMetric's for all the hosts
|
|
foreach (IXenObject obj in objects)
|
|
{
|
|
Host host = obj as Host;
|
|
if (host != null)
|
|
hosts[host] = new HostMetric();
|
|
}
|
|
|
|
// Create VmMetric's for all the VMs, and put them under their hosts, indexed by uuid
|
|
foreach (IXenObject obj in objects)
|
|
{
|
|
VM vm = obj as VM;
|
|
if (vm != null)
|
|
{
|
|
Host host = GetHost(vm);
|
|
if (host != null)
|
|
{
|
|
var hm = hosts.GetOrAdd(host, new HostMetric());
|
|
string uuid = Helpers.GetUuid(vm);
|
|
hm.VMs[uuid] = new VmMetric();
|
|
}
|
|
}
|
|
}
|
|
|
|
lock (_hostsLock)
|
|
{
|
|
_hosts = hosts;
|
|
}
|
|
|
|
_skip_sleep = true;
|
|
lock (_sleepMonitor)
|
|
Monitor.PulseAll(_sleepMonitor);
|
|
}
|
|
|
|
private bool AnyNewObjects(IXenObject[] objects)
|
|
{
|
|
foreach (IXenObject obj in objects)
|
|
{
|
|
Host host = obj as Host;
|
|
if (host != null)
|
|
{
|
|
if (!_hosts.ContainsKey(host))
|
|
return true;
|
|
continue;
|
|
}
|
|
|
|
VM vm = obj as VM;
|
|
if (vm != null)
|
|
{
|
|
Host vmHost = GetHost(vm);
|
|
|
|
if (vmHost != null)
|
|
{
|
|
HostMetric hm;
|
|
if (!_hosts.TryGetValue(vmHost, out hm))
|
|
return true;
|
|
string uuid = Helpers.GetUuid(vm);
|
|
if (!hm.VMs.ContainsKey(uuid))
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public double GetValue(IXenObject obj, string property)
|
|
{
|
|
Host host = GetHost(obj);
|
|
if (host == null)
|
|
return 0d;
|
|
|
|
HostMetric host_resident;
|
|
if (!_hosts.TryGetValue(host, out host_resident))
|
|
return 0d;
|
|
|
|
if (obj is Host)
|
|
{
|
|
double result;
|
|
if (host_resident.Values.TryGetValue(property, out result))
|
|
return result;
|
|
return 0d;
|
|
}
|
|
|
|
string uuid = Helpers.GetUuid(obj);
|
|
|
|
VmMetric vm = host_resident.GetVmByUuid(uuid);
|
|
|
|
if (vm != null)
|
|
{
|
|
double result;
|
|
if (vm.Values.TryGetValue(property, out result))
|
|
return result;
|
|
}
|
|
|
|
return 0d;
|
|
}
|
|
|
|
private const string RrdUpdatesPath = "rrd_updates";
|
|
private const string RrdHostAndVmUpdatesQuery = "session_id={0}&start={1}&cf={2}&interval={3}&host=true";
|
|
private const long TicksInTenSeconds = 100000000;
|
|
private const string RrdCFAverage = "AVERAGE";
|
|
|
|
private static Uri GetUri(Session session, Host host)
|
|
{
|
|
UriBuilder builder = new UriBuilder();
|
|
builder.Scheme = host.Connection.UriScheme;
|
|
builder.Host = host.address;
|
|
builder.Port = host.Connection.Port;
|
|
builder.Path = RrdUpdatesPath;
|
|
builder.Query = string.Format(RrdHostAndVmUpdatesQuery, Uri.EscapeDataString(session.uuid), TimeUtil.TicksToSecondsSince1970(DateTime.UtcNow.Ticks - (host.Connection.ServerTimeOffset.Ticks + TicksInTenSeconds)), RrdCFAverage, 5);
|
|
return builder.Uri;
|
|
}
|
|
|
|
private static Host GetHost(IXenObject obj)
|
|
{
|
|
Host host = obj as Host;
|
|
if (host == null && obj is VM)
|
|
{
|
|
host = obj.Connection.Resolve<Host>(((VM)obj).resident_on);
|
|
if (host == null)
|
|
{
|
|
host = Helpers.GetMaster(obj.Connection);
|
|
}
|
|
}
|
|
return host;
|
|
}
|
|
|
|
private static string GetSetName(string p)
|
|
{
|
|
string[] bits = p.Split(':');
|
|
return bits[bits.Length - 1];
|
|
}
|
|
|
|
public void Prod()
|
|
{
|
|
_skip_sleep = true;
|
|
lock (_sleepMonitor)
|
|
Monitor.PulseAll(_sleepMonitor);
|
|
}
|
|
|
|
protected virtual void OnMetricsUpdate(EventArgs e)
|
|
{
|
|
EventHandler handler = MetricsUpdated;
|
|
|
|
if (handler != null)
|
|
{
|
|
handler(this, e);
|
|
}
|
|
}
|
|
|
|
private class HostMetric
|
|
{
|
|
public readonly ConcurrentDictionary<string, double> Values = new ConcurrentDictionary<string, double>();
|
|
public readonly ConcurrentDictionary<string, VmMetric> VMs = new ConcurrentDictionary<string, VmMetric>(); // VMs under this host, indexed by uuid
|
|
|
|
public VmMetric GetVmByUuid(string uuid)
|
|
{
|
|
VmMetric ans;
|
|
if (VMs.TryGetValue(uuid, out ans))
|
|
return ans;
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private class VmMetric
|
|
{
|
|
public readonly ConcurrentDictionary<string, double> Values = new ConcurrentDictionary<string, double>();
|
|
}
|
|
|
|
/// <summary>
|
|
/// This function is used for generate resource report only.
|
|
/// </summary>
|
|
public void UpdateMetricsOnce()
|
|
{
|
|
Parallel.ForEach(_hosts.Keys.Where(h => h.Connection.IsConnected),
|
|
host =>
|
|
{
|
|
HostMetric hm;
|
|
if (_hosts.TryGetValue(host, out hm))
|
|
{
|
|
var values = ValuesFor(host);
|
|
DistributeValues(values, hm);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
}
|