public async Task EnsureWriteCapacityAlarm(TableDescription table, string alarmNameSuffix, double thresholdFraction,
string snsTopicArn, bool dryRun)
{
var alarmName = GetAlarmName(table, AwsMetrics.ConsumedWriteCapacity, alarmNameSuffix);
var thresholdInUnits = AlarmThresholds.Calulate(table.ProvisionedThroughput.WriteCapacityUnits, thresholdFraction);
await CheckTableAlarm(alarmName, table.TableName, AwsMetrics.ConsumedWriteCapacity,
thresholdInUnits, AwsConstants.FiveMinutesInSeconds, snsTopicArn, dryRun);
}
public async Task EnsureReadCapacityAlarm(TableDescription table, GlobalSecondaryIndexDescription index, string alarmNameSuffix,
double thresholdFraction, string snsTopicArn, bool dryRun)
{
var alarmName = GetAlarmName(table, index, AwsMetrics.ConsumedReadCapacity, alarmNameSuffix);
var thresholdInUnits = AlarmThresholds.Calulate(index.ProvisionedThroughput.ReadCapacityUnits, thresholdFraction);
await CheckIndexAlarm(alarmName, table.TableName, index.IndexName, AwsMetrics.ConsumedReadCapacity,
thresholdInUnits, AwsConstants.FiveMinutesInSeconds, snsTopicArn, dryRun);
}
public async Task CorrectAlarmsAreCreatedForEachTable()
{
var mockery = new DynamoAlarmGeneratorMockery();
var generator = mockery.AlarmGenerator;
ConfigureTables(mockery);
await generator.GenerateAlarmsFor(ConfigWithThresholds(), RunMode.GenerateAlarms);
var expectedTable1ReadThreshold = (int)AlarmThresholds.Calulate(ReadCapacity, 0.4);
var expectedTable1WriteThreshold = (int)AlarmThresholds.Calulate(WriteCapacity, 0.4);
CloudwatchVerify.AlarmWasPutOnTable(mockery.Cloudwatch,
alarmName: "test1-ConsumedReadCapacityUnits-TestGroup",
tableName: "test1",
metricName: "ConsumedReadCapacityUnits",
threshold: expectedTable1ReadThreshold,
period: 300);
CloudwatchVerify.AlarmWasPutOnTable(mockery.Cloudwatch,
alarmName: "test1-ConsumedWriteCapacityUnits-TestGroup",
tableName: "test1",
metricName: "ConsumedWriteCapacityUnits",
threshold: expectedTable1WriteThreshold,
period: 300);
var expectedTable2ReadThreshold = (int)AlarmThresholds.Calulate(ReadCapacity, 0.65);
var expectedTable2WriteThreshold = (int)AlarmThresholds.Calulate(WriteCapacity, 0.65);
CloudwatchVerify.AlarmWasPutOnTable(mockery.Cloudwatch,
alarmName: "test2-ConsumedReadCapacityUnits-TestGroup",
tableName: "test2",
metricName: "ConsumedReadCapacityUnits",
threshold: expectedTable2ReadThreshold,
period: 300);
CloudwatchVerify.AlarmWasPutOnTable(mockery.Cloudwatch,
alarmName: "test2-ConsumedWriteCapacityUnits-TestGroup",
tableName: "test2",
metricName: "ConsumedWriteCapacityUnits",
threshold: expectedTable2WriteThreshold,
period: 300);
}
