public async Task AutoScaleEvaluationIntervalTest()
{
await SynchronizationContextHelper.RunTestAsync(async() =>
{
using (BatchClient batchCli = TestUtilities.OpenBatchClient(TestUtilities.GetCredentialsFromEnvironment(), addDefaultRetryPolicy: false))
{
const string poolASFormulaOrig = "$TargetDedicated = 0;";
TimeSpan evalInterval = TimeSpan.FromMinutes(6);
string poolId0 = "AutoScaleEvalInterval0-" + TestUtilities.GetMyName();
try
{
// create an empty pool with autoscale and an eval interval
CloudServiceConfiguration cloudServiceConfiguration = new CloudServiceConfiguration(PoolFixture.OSFamily);
CloudPool ubPool = batchCli.PoolOperations.CreatePool(
poolId0,
cloudServiceConfiguration: cloudServiceConfiguration,
virtualMachineSize: PoolFixture.VMSize);
ubPool.AutoScaleEnabled = true;
ubPool.AutoScaleEvaluationInterval = evalInterval;
ubPool.AutoScaleFormula = poolASFormulaOrig;
ubPool.Commit();
// confirm values are returned
CloudPool bndPool = batchCli.PoolOperations.GetPool(poolId0);
Assert.True(bndPool.AutoScaleEnabled.HasValue && bndPool.AutoScaleEnabled.Value);
Assert.Equal(evalInterval, bndPool.AutoScaleEvaluationInterval);
// change eval interval
TimeSpan newEvalInterval = evalInterval + TimeSpan.FromMinutes(1);
bndPool.EnableAutoScale(autoscaleEvaluationInterval: newEvalInterval);
int enableCallCounter = 1; // count these to validate server throttle
const int expectedEnableCallToFail = 2;
bndPool.Refresh();
Assert.True(bndPool.AutoScaleEnabled.HasValue && bndPool.AutoScaleEnabled.Value);
Assert.True(bndPool.AutoScaleEvaluationInterval.HasValue);
Assert.Equal(newEvalInterval, bndPool.AutoScaleEvaluationInterval.Value);
// check the interval floor assert
var batchException = TestUtilities.AssertThrows <BatchException>(
() => bndPool.EnableAutoScale(autoscaleEvaluationInterval: TimeSpan.FromMinutes(1)));
Assert.Equal(Microsoft.Azure.Batch.Common.BatchErrorCodeStrings.InvalidPropertyValue, batchException.RequestInformation.BatchError.Code);
// check for AutoScaleTooManyRequestsToEnable
try
{
// spam the server
for (int i = 0; i < 99; i++) // remember there was already one (1) call made above
{
enableCallCounter++; // one more call
bndPool.EnableAutoScale(autoscaleEvaluationInterval: newEvalInterval + TimeSpan.FromSeconds(i));
}
// server never pushed back on the spam. this is a bug
throw new Exception("AutoScaleEvaluationIntervalTest: unable to force AutoScaleTooManyRequestsToEnable");
}
catch (Exception ex)
{
TestUtilities.AssertIsBatchExceptionAndHasCorrectAzureErrorCode(ex, Microsoft.Azure.Batch.Common.BatchErrorCodeStrings.AutoScaleTooManyRequestsToEnable, this.testOutputHelper);
// if we get here the exception passed.
// confirm that the expected call fails
Assert.Equal(expectedEnableCallToFail, enableCallCounter);
}
}
finally
{
// cleanup
TestUtilities.DeletePoolIfExistsAsync(batchCli, poolId0).Wait();
}
}
},
TestTimeout);
}