public async Task<IHttpActionResult> UpdateConfiguration(Configuration newConfig)
{
return await DoActionAsync("ConfigurationController.UpdateConfiguration", async (serviceClient) =>
{
UpdateConfigStatus.ConfigUpdate operationStatus = null;
try
{
// Do some validation checks first
var operationStatusTask = UpdateConfigStatus.GetActiveStatus();
var serviceConfigTask = serviceClient.GetDeploymentConfiguration();
await Task.WhenAll(operationStatusTask, serviceConfigTask);
if (operationStatusTask.Result != null)
{
return BadRequest(String.Format("Operation: {0} is already underway. Wait for this operation to complete before attempting further updates.", operationStatusTask.Result.OperationId));
}
var serviceSettings = AzureServiceConfiguration.GetSettingsProjected(serviceConfigTask.Result);
if (!CompareAccountName(serviceSettings, newConfig.AccountSettings, DashConfiguration.KeyNamespaceAccount))
{
return BadRequest("Cannot change the namespace account name once is has been set.");
}
int accountIndex = 0;
foreach (var currentAccount in serviceSettings
.Where(AzureServiceConfiguration.SettingPredicateScaleoutStorage))
{
if (!CompareAccountName(currentAccount, newConfig.ScaleAccounts.Accounts.ElementAtOrDefault(accountIndex++)))
{
var removedAccount = ParseConnectionString(currentAccount.Item2);
return BadRequest(String.Format("Data account [{0]} cannot be removed.", removedAccount.AccountName));
}
}
// Do some preamble work here synchronously (begin creation of any new storage accounts - we need to return the keys),
// but then enqueue a message on our async worker queue to complete the full update in a reliable manner without having
// the client wait forever for a response. The response will be an operationid which can be checked on by calling
// the /operations/operationid endpoint.
var operationId = DashTrace.CorrelationId.ToString();
// Reconcile storage accounts - any new accounts (indicated by a blank key) we will create immediately & include the key in the returned config
var newAccounts = new[] {
ParseConnectionString(newConfig.AccountSettings, DashConfiguration.KeyNamespaceAccount, true),
ParseConnectionString(newConfig.AccountSettings, DashConfiguration.KeyDiagnosticsAccount, true)
}
.Concat(newConfig.ScaleAccounts.Accounts
.Select(account => new StorageAccountCreationInfo
{
AccountInfo = account,
}))
.Where(account => account != null && account.AccountInfo != null && String.IsNullOrWhiteSpace(account.AccountInfo.AccountKey))
.ToList();
// Start our operation log - use the namespace account specified in the configuration
var namespaceAccount = DashConfiguration.NamespaceAccount;
// See if they've specified an account in the new config
var toBeCreatedNamespace = newAccounts
.FirstOrDefault(account => String.Equals(account.ConfigKey, DashConfiguration.KeyNamespaceAccount, StringComparison.OrdinalIgnoreCase));
if (toBeCreatedNamespace == null)
{
CloudStorageAccount.TryParse(newConfig.AccountSettings[DashConfiguration.KeyNamespaceAccount], out namespaceAccount);
}
operationStatus = await UpdateConfigStatus.GetConfigUpdateStatus(operationId, namespaceAccount);
await operationStatus.UpdateStatus(UpdateConfigStatus.States.NotStarted, "Begin service update process. OperationId: [{0}]", operationId);
operationStatus.AccountsToBeCreated = newAccounts
.Select(account => account.AccountInfo.AccountName)
.ToList();
if (newAccounts.Any())
{
await operationStatus.UpdateStatus(UpdateConfigStatus.States.CreatingAccounts, "Creating new storage accounts: [{0}]", String.Join(", ", operationStatus.AccountsToBeCreated));
var newAccountTasks = await CreateStorageAccounts(serviceClient, newConfig, newAccounts);
await Task.WhenAll(newAccountTasks);
// If we just created a new account for the namespace, wire it up now
if (CloudStorageAccount.TryParse(newConfig.AccountSettings[DashConfiguration.KeyNamespaceAccount], out namespaceAccount))
{
operationStatus.StatusHandler.UpdateCloudStorageAccount(namespaceAccount);
}
// Switch AccountsToBeCreated to the request ids that the async task can verify are completed
operationStatus.AccountsToBeCreated = newAccountTasks
.Select(newAccoutTask => newAccoutTask.Result)
.Where(requestId => !String.IsNullOrWhiteSpace(requestId))
.ToList();
await operationStatus.UpdateStatus(UpdateConfigStatus.States.CreatingAccounts, "Creation of new storage accounts initiated.");
}
// TODO: When we enable storage analytics (or at least a utilization report), we will need to turn on metrics for
// every storage account here.
string asyncQueueName = newConfig.GeneralSettings[DashConfiguration.KeyWorkerQueueName];
// Work out the list of accounts to import
var newConfigSettings = newConfig.AccountSettings
.Select(setting => Tuple.Create(setting.Key, setting.Value))
.Concat(newConfig.GeneralSettings
.Select(setting => Tuple.Create(setting.Key, setting.Value)))
.Concat(newConfig.ScaleAccounts.Accounts
.Select((account, index) => Tuple.Create(String.Format("{0}{1}", DashConfiguration.KeyScaleoutAccountPrefix, index), GenerateConnectionString(account))))
.ToDictionary(setting => setting.Item1, setting => setting.Item2, StringComparer.OrdinalIgnoreCase);
var scaleoutAccounts = serviceSettings
.Where(AzureServiceConfiguration.SettingPredicateScaleoutStorage)
.Select(account => ParseConnectionString(account.Item2))
.Where(account => account != null)
.ToDictionary(account => account.AccountName, StringComparer.OrdinalIgnoreCase);
var importAccounts = newConfig.ScaleAccounts.Accounts
.Where(newAccount => !scaleoutAccounts.ContainsKey(newAccount.AccountName))
.ToList();
// Prepare the new accounts, import accounts & service configuration information into a message for the async worker.
// Despite kicking the async worker off directly here, we need the message durably enqueued so that any downstream
// failures will be retried.
var rdfeAccessToken = await GetRdfeRefreshToken();
operationStatus.AccountsToBeImported = importAccounts
.Select(account => account.AccountName)
.ToList();
var message = new QueueMessage(MessageTypes.UpdateService,
new Dictionary<string, string>
{
{ UpdateServicePayload.OperationId, operationId },
{ UpdateServicePayload.SubscriptionId, serviceClient.SubscriptionId },
{ UpdateServicePayload.ServiceName, serviceClient.ServiceName },
{ UpdateServicePayload.RefreshToken, rdfeAccessToken },
},
DashTrace.CorrelationId);
var messageWrapper = new UpdateServicePayload(message);
messageWrapper.CreateAccountRequestIds = operationStatus.AccountsToBeCreated;
messageWrapper.ImportAccounts = importAccounts
.Select(account => GenerateConnectionString(account));
messageWrapper.Settings = newConfigSettings;
// Post message to the new namespace account (it may have changed) as that is where the async workers will read from after update
await new AzureMessageQueue(namespaceAccount, asyncQueueName).EnqueueAsync(message, 0);
// Manually fire up the async worker (so that we can supply it with the new namespace account)
var queueTask = ProcessOperationMessageLoop(operationId, namespaceAccount, GenerateConnectionString(namespaceAccount), GetMessageDelay(), asyncQueueName);
newConfig.OperationId = operationId;
newConfig.ScaleAccounts.MaxAccounts = DashConfiguration.MaxDataAccounts;
return Content(HttpStatusCode.Accepted, newConfig);
}
catch (Exception ex)
{
if (operationStatus != null)
{
var task = operationStatus.UpdateStatus(UpdateConfigStatus.States.Failed, ex.ToString());
}
throw;
}
});
}
static async Task<IEnumerable<Task<string>>> CreateStorageAccounts(AzureServiceManagementClient serviceClient, Configuration newConfig, IEnumerable<StorageAccountCreationInfo> newAccounts)
{
string location = await serviceClient.GetServiceLocation();
return newAccounts
.Select(accountToCreate =>
{
DashTrace.TraceInformation("Creating storage account: [{0}]", accountToCreate.AccountInfo.AccountName);
// Determine if we're blocking or async
Func<Task<string>> createTask = accountToCreate.IsBlockingOperation ?
(Func<Task<string>>)(() => serviceClient.CreateStorageAccount(accountToCreate.AccountInfo.AccountName, location)) :
(Func<Task<string>>)(() => serviceClient.BeginCreateStorageAccount(accountToCreate.AccountInfo.AccountName, location));
return createTask()
.ContinueWith(antecedent =>
{
switch (antecedent.Status)
{
case TaskStatus.RanToCompletion:
string accountKey = accountToCreate.IsBlockingOperation ? antecedent.Result : String.Empty;
if (!accountToCreate.IsBlockingOperation)
{
// Although this isn't a blocking operation, we do have to block until we can retrieve the storage key
try
{
accountKey = serviceClient.GetStorageAccountKey(accountToCreate.AccountInfo.AccountName,
2500,
new CancellationTokenSource(serviceClient.StorageAccountGetKeysTimeout()).Token).Result;
}
catch (AggregateException ex)
{
throw new OperationCanceledException(
String.Format("Failed to obtain access keys for storage account [{0}]. Details: {1}",
accountToCreate.AccountInfo.AccountName,
ex.InnerException));
}
}
accountToCreate.AccountInfo.AccountKey = accountKey;
// Update the config
if (!String.IsNullOrWhiteSpace(accountToCreate.ConfigKey))
{
newConfig.AccountSettings[accountToCreate.ConfigKey] = GenerateConnectionString(accountToCreate.AccountInfo);
}
// For async operations return the request id
return accountToCreate.IsBlockingOperation ? String.Empty : antecedent.Result;
case TaskStatus.Faulted:
throw new OperationCanceledException(
String.Format("Failed to create storage account [{0}]. Details: {1}",
accountToCreate.AccountInfo.AccountName,
antecedent.Exception is AggregateException ? antecedent.Exception.InnerException : antecedent.Exception));
case TaskStatus.Canceled:
throw new OperationCanceledException(String.Format("Creation of storage account [{0}] was cancelled.", accountToCreate.AccountInfo.AccountKey));
default:
System.Diagnostics.Debug.Assert(false);
throw new TaskCanceledException(String.Format("Creation of storage account [{0}] failed in unhandled state [{1}].", accountToCreate.AccountInfo.AccountKey, antecedent.Status));
}
});
})
.ToList();
}