private Alert GenerateAlert(AlertPolicy alertPolicy, AlertTrigger trigger, ServerStatistic statistic, string serverId, string message)
{
var alert = new Alert()
{
AlertPolicyId = alertPolicy.Id,
ServerId = serverId,
Metric = trigger.Metric,
Message = message,
GeneratedOn = statistic.Timestamp
};
return alert;
}
void SetInternalAlertPolicyProperties(AlertPolicy policy)
{
policy.ServerService = serverService;
}
/// <summary>
/// Determines if a server has violated a certain alert policy and returns an alert if true;
/// </summary>
private Alert GetServerAlert(AlertPolicy alertPolicy, AlertTrigger trigger, ServerStatistic statistic, string serverId)
{
if (string.Equals(trigger.Metric, Constants.Metrics.Cpu, StringComparison.CurrentCultureIgnoreCase))
{
if (statistic.CpuPercent > ((float)trigger.Threshold))
{
return GenerateAlert(alertPolicy, trigger, statistic, serverId, Constants.AlertMessages.CpuAlert);
}
}
if (string.Equals(trigger.Metric, Constants.Metrics.Memory, StringComparison.CurrentCultureIgnoreCase))
{
if (statistic.MemoryPercent > ((float)trigger.Threshold))
{
return GenerateAlert(alertPolicy, trigger, statistic, serverId, Constants.AlertMessages.MemoryAlert);
}
}
if (string.Equals(trigger.Metric, Constants.Metrics.Disk, StringComparison.CurrentCultureIgnoreCase))
{
float totalDiskUsage = 0;
foreach (var guestDiskUsage in statistic.GuestDiskUsage)
{
float usage = (guestDiskUsage.ConsumedMB / guestDiskUsage.CapacityMB);
totalDiskUsage += usage;
}
if (totalDiskUsage > (trigger.Threshold / 100f))
{
return GenerateAlert(alertPolicy, trigger, statistic, serverId, Constants.AlertMessages.DiskUsageAlert);
}
}
return null;
}