static async Task <(string functionArn, string functionName, Func <Task> functionCleanup)> CreateFunction(
string roleArn,
IAmazonLambda lambda,
LambdaCreationOptions options)
{
var functionName = $"Beetles_{options.Name}_{options.Timestamp}";
var retryWait = Stopwatch.StartNew();
CreateFunctionResponse function = null;
do
{
try
{
function = await lambda.CreateFunctionAsync(new CreateFunctionRequest
{
Code = new FunctionCode {
ZipFile = new MemoryStream(File.ReadAllBytes(options.PackagePath))
},
Description = $"Beetles Load Test {options.Name}",
FunctionName = functionName,
Handler = options.LambdaHandlerName,
MemorySize = options.MemorySize,
Publish = true,
Role = roleArn,
Runtime = "dotnetcore2.1",
Timeout = 120,
Environment = new Environment
{
Variables =
{
[Constants.ConfigurationTypeNameKey] = options.SettingsTypeName
}
},
VpcConfig = new VpcConfig()
}, options.CancellationToken);
// await lambda.PutFunctionConcurrencyAsync(new PutFunctionConcurrencyRequest()
// {
// FunctionName = functionName,
// ReservedConcurrentExecutions = options.ProvisionedConcurrency
// }, options.CancellationToken);
}
catch (InvalidParameterValueException) when(retryWait.Elapsed < TimeSpan.FromMinutes(1))
{
}
} while (function == null);
var functionArn = function.FunctionArn;
return(functionArn, functionName, async() => await lambda.DeleteFunctionAsync(functionName));
}
static async Task <(string topicArn, Func <Task> cleanup)> CreateLambda(LambdaCreationOptions lambdaCreationOptions)
{
var cleanup = new List <Func <Task> >();
var log = lambdaCreationOptions.Verbose;
string publishTopic;
var lambdaClient = new AmazonLambdaClient();
var snsClient = new AmazonSimpleNotificationServiceClient();
var iamClient = new AmazonIdentityManagementServiceClient();
cleanup.Add(() =>
{
lambdaClient.Dispose();
snsClient.Dispose();
iamClient.Dispose();
return(Task.CompletedTask);
});
try
{
log("Creating IAM Role");
var(roleArn, _, roleCleanup) =
await CreateRole(iamClient, lambdaCreationOptions.Timestamp, lambdaCreationOptions.Name,
lambdaCreationOptions.CancellationToken);
cleanup.Add(roleCleanup);
log("Creating Function");
var(functionArn, _, functionCleanup) =
await CreateFunction(roleArn,
lambdaClient,
lambdaCreationOptions);
cleanup.Add(functionCleanup);
log("Creating SNS Topic");
var(topicArn, topicCleanup) =
await CreateTopic(snsClient, lambdaCreationOptions.Timestamp, lambdaCreationOptions.Name,
lambdaCreationOptions.CancellationToken);
cleanup.Add(topicCleanup);
publishTopic = topicArn;
log("Creating SNS Subscription");
var subCleaner = await Subscribe(snsClient, functionArn, topicArn, lambdaCreationOptions.CancellationToken);
cleanup.Add(subCleaner);
log("Permissioning SNS to execute the function");
var permCleanup = await AddExecutionFromSnsPermission(lambdaClient, functionArn, topicArn,
lambdaCreationOptions.CancellationToken);
cleanup.Add(permCleanup);
}
catch (Exception)
{
log("Cleaning up resources");
await Cleanup(cleanup);
throw;
}
return(publishTopic, () => Cleanup(cleanup));
}