/// <summary>
/// Updates the website based on the scale option
/// </summary>
public WasabiWebState MonitorAndScale()
{
_timer.Elapsed += (sender, args) => _stateHistory.Add(DateTime.Now, MonitorAndScale());
EnsureManagementCertificate();
// use the certificate to run the client and command
var client = new WebsiteClient(SubscriptionId, ManagementCertificate, _engine.WebsiteName);
// get the metrics for the timer time period
var metrics = client.GetWebsiteMetricsPerInterval(TimeSpan.FromMinutes(_engine.SamplesPeriodInMins));
if (metrics.Count == 0)
{
return(WasabiWebState.LeaveUnchanged);
}
var scalePotential = _engine.Scale(Operation, metrics);
// with the scale potential we'll need to increase or decrease the instance count
if (scalePotential == WasabiWebState.ScaleDown && client.InstanceCount > 1)
{
client.InstanceCount -= 1;
}
if (scalePotential == WasabiWebState.ScaleUp && client.InstanceCount < 10)
{
client.InstanceCount += 1;
}
client.Update();
// raise the event now
if (ScaleUpdate != null)
{
ScaleUpdate(scalePotential, client.InstanceCount);
}
return(scalePotential);
}
/// <summary>
/// Raises the alert event if any of the metrics have been breached in the time period
/// </summary>
public void MonitorAndAlert()
{
EnsureManagementCertificate();
// use the certificate to run the client and command
var client = new WebsiteClient(SubscriptionId, ManagementCertificate, _engine.WebsiteName);
// get the metrics for the timer time period
var metrics = client.GetWebsiteMetricsPerInterval(TimeSpan.FromMinutes(_engine.SamplesPeriodInMins));
// enumerate the metrics piece by piece
foreach (var metric in metrics)
{
// check for the metric to ensure it's in the collection otherwise discard it
if (_engine[metric.Name] == null)
{
continue;
}
var rule = _engine[metric.Name];
if ((metric.Total > rule.IsGreaterThan || metric.Total < rule.IsLessThan) && SubscribeAlerts != null)
{
SubscribeAlerts(metric, rule);
}
}
}