private async Task EnsureReadAlarms(AlarmTables alarmTables)
{
foreach (var table in alarmTables.Tables)
{
await EnsureReadAlarms(alarmTables, table);
}
}
private async Task EnsureWriteAlarms(AlarmTables alarmTables)
{
foreach (var table in alarmTables.Tables)
{
var monitorWrites = table.MonitorWrites ?? true;
if (monitorWrites)
{
await EnsureWriteAlarm(alarmTables, table);
}
else
{
_logger.Detail($"Not monitoring writes to {table.Name}");
}
}
}
private async Task EnsureWriteAlarm(AlarmTables alarmTables, Table table)
{
try
{
var tableResource = await _tableSource.GetResourceAsync(table.Name);
if (tableResource == null)
{
_logger.Info($"Skipping named table {table.Name} as it does not exist");
return;
}
var tableDescription = tableResource.Resource;
var threshold = table.Threshold ?? alarmTables.Threshold;
await _tableAlarmCreator.EnsureWriteCapacityAlarm(tableDescription, alarmTables.AlarmNameSuffix,
threshold, alarmTables.SnsTopicArn, alarmTables.DryRun);
var monitorThrottling = table.MonitorThrottling ?? alarmTables.MonitorThrottling;
var throttlingThreshold = table.ThrottlingThreshold ?? alarmTables.ThrottlingThreshold;
if (monitorThrottling)
{
await _tableAlarmCreator.EnsureWriteThrottleAlarm(tableDescription, alarmTables.AlarmNameSuffix,
throttlingThreshold,
alarmTables.SnsTopicArn, alarmTables.DryRun);
}
foreach (var index in tableDescription.GlobalSecondaryIndexes)
{
await _indexAlarmCreator.EnsureWriteCapacityAlarm(tableDescription, index, alarmTables.AlarmNameSuffix, threshold,
alarmTables.SnsTopicArn, alarmTables.DryRun);
if (monitorThrottling)
{
await _indexAlarmCreator.EnsureWriteThrottleAlarm(tableDescription, index, alarmTables.AlarmNameSuffix,
throttlingThreshold, alarmTables.SnsTopicArn, alarmTables.DryRun);
}
}
}
catch (Exception ex)
{
_logger.Error(ex, $"Error when creating table write alarm for {table.Name}");
throw;
}
}
private async Task EnsureReadAlarms(AlarmTables alarmTables, Table table)
{
try
{
var tableResource = await _tableSource.GetResourceAsync(table.Name);
var tableDescription = tableResource.Resource;
var threshold = table.Threshold ?? alarmTables.Threshold;
await _tableAlarmCreator.EnsureReadCapacityAlarm(tableDescription, alarmTables.AlarmNameSuffix,
threshold, alarmTables.SnsTopicArn, alarmTables.DryRun);
var monitorThrottling = table.MonitorThrottling ?? alarmTables.MonitorThrottling;
var throttlingThreshold = table.ThrottlingThreshold ?? alarmTables.ThrottlingThreshold;
if (monitorThrottling)
{
await _tableAlarmCreator.EnsureReadThrottleAlarm(tableDescription, alarmTables.AlarmNameSuffix,
throttlingThreshold,
alarmTables.SnsTopicArn, alarmTables.DryRun);
}
foreach (var index in tableDescription.GlobalSecondaryIndexes)
{
await _indexAlarmCreator.EnsureReadCapacityAlarm(tableDescription, index, alarmTables.AlarmNameSuffix, threshold,
alarmTables.SnsTopicArn, alarmTables.DryRun);
if (monitorThrottling)
{
await _indexAlarmCreator.EnsureReadThrottleAlarm(tableDescription, index, alarmTables.AlarmNameSuffix,
throttlingThreshold, alarmTables.SnsTopicArn, alarmTables.DryRun);
}
}
}
catch (Exception ex)
{
_logger.Error(ex, $"Error when creating table read alarm for {table.Name}");
throw;
}
}
