async IAsyncEnumerable <DescribeStackEventsResponse> IPaginator <DescribeStackEventsResponse> .PaginateAsync(CancellationToken cancellationToken = default)
{
if (Interlocked.Exchange(ref _isPaginatorInUse, 1) != 0)
{
throw new System.InvalidOperationException("Paginator has already been consumed and cannot be reused. Please create a new instance.");
}
var nextToken = _request.NextToken;
DescribeStackEventsResponse response;
do
{
_request.NextToken = nextToken;
response = await _client.DescribeStackEventsAsync(_request, cancellationToken).ConfigureAwait(false);
nextToken = response.NextToken;
cancellationToken.ThrowIfCancellationRequested();
yield return(response);
}while (nextToken != null);
}
public static async Task <string> GetMostRecentStackEventIdAsync(this IAmazonCloudFormation cfnClient, string stackName)
{
try {
var response = await cfnClient.DescribeStackEventsAsync(new DescribeStackEventsRequest {
StackName = stackName
});
var mostRecentStackEvent = response.StackEvents.First();
// make sure the stack is not already in an update operation
if (!mostRecentStackEvent.IsFinalStackEvent())
{
throw new System.InvalidOperationException("stack appears to be undergoing an update operation");
}
return(mostRecentStackEvent.EventId);
} catch (AmazonCloudFormationException) {
// NOTE (2018-12-11, bjorg): exception is thrown when stack doesn't exist; ignore it
}
return(null);
}
private static async Task <List <StackEvent> > GetLatestEventsAsync(ILogger log, IAmazonCloudFormation cloudformation, string stackName, DateTime mintimeStampForEvents, string mostRecentEventId)
{
var noNewEvents = false;
var events = new List <StackEvent>();
DescribeStackEventsResponse response = null;
do
{
var request = new DescribeStackEventsRequest {
StackName = stackName
};
if (response != null)
{
request.NextToken = response.NextToken;
}
try
{
response = await cloudformation.DescribeStackEventsAsync(request).ConfigureAwait(false);
}
catch (Exception e)
{
log.Error(e, "Error getting events for stack");
throw;
}
foreach (var evnt in response.StackEvents)
{
if (string.Equals(evnt.EventId, mostRecentEventId) || evnt.Timestamp < mintimeStampForEvents)
{
noNewEvents = true;
break;
}
events.Add(evnt);
}
} while (!noNewEvents && !string.IsNullOrEmpty(response.NextToken));
return(events);
}
private Amazon.CloudFormation.Model.DescribeStackEventsResponse CallAWSServiceOperation(IAmazonCloudFormation client, Amazon.CloudFormation.Model.DescribeStackEventsRequest request)
{
Utils.Common.WriteVerboseEndpointMessage(this, client.Config, "AWS CloudFormation", "DescribeStackEvents");
try
{
#if DESKTOP
return(client.DescribeStackEvents(request));
#elif CORECLR
return(client.DescribeStackEventsAsync(request).GetAwaiter().GetResult());
#else
#error "Unknown build edition"
#endif
}
catch (AmazonServiceException exc)
{
var webException = exc.InnerException as System.Net.WebException;
if (webException != null)
{
throw new Exception(Utils.Common.FormatNameResolutionFailureMessage(client.Config, webException.Message), webException);
}
throw;
}
}
private async Task <List <StackEvent> > GetStackEvents(string?lastEventId, string stackId, DeployContext context, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var request = new DescribeStackEventsRequest {
StackName = stackId
};
var response = await cloudformation.DescribeStackEventsAsync(request, cancellationToken);
var relevantEvents = new List <StackEvent>();
foreach (var @event in response.StackEvents)
{
if (@event.EventId == lastEventId || @event.Timestamp < context.Timestamp)
{
break;
}
relevantEvents.Add(@event);
}
relevantEvents.Reverse();
return(relevantEvents);
}
public static async Task <(Stack Stack, bool Success)> TrackStackUpdateAsync(
this IAmazonCloudFormation cfnClient,
string stackName,
string stackId,
string mostRecentStackEventId,
ModuleNameMappings nameMappings = null,
LogErrorDelegate logError = null
)
{
var seenEventIds = new HashSet <string>();
var foundMostRecentStackEvent = (mostRecentStackEventId == null);
var request = new DescribeStackEventsRequest {
StackName = stackId ?? stackName
};
var eventList = new List <StackEvent>();
var ansiLinesPrinted = 0;
// iterate as long as the stack is being created/updated
var active = true;
var success = false;
while (active)
{
await Task.Delay(TimeSpan.FromSeconds(3));
// fetch as many events as possible for the current stack
var events = new List <StackEvent>();
try {
var response = await cfnClient.DescribeStackEventsAsync(request);
events.AddRange(response.StackEvents);
} catch (System.Net.Http.HttpRequestException e) when((e.InnerException is System.Net.Sockets.SocketException) && (e.InnerException.Message == "No such host is known"))
{
// ignore network issues and just try again
continue;
}
events.Reverse();
// skip any events that preceded the most recent event before the stack update operation
while (!foundMostRecentStackEvent && events.Any())
{
var evt = events.First();
if (evt.EventId == mostRecentStackEventId)
{
foundMostRecentStackEvent = true;
}
seenEventIds.Add(evt.EventId);
events.RemoveAt(0);
}
if (!foundMostRecentStackEvent)
{
throw new ApplicationException($"unable to find starting event for stack: {stackName}");
}
// report only on new events
foreach (var evt in events.Where(evt => !seenEventIds.Contains(evt.EventId)))
{
UpdateEvent(evt);
if (!seenEventIds.Add(evt.EventId))
{
// we found an event we already saw in the past, no point in looking at more events
break;
}
if (IsFinalStackEvent(evt) && (evt.LogicalResourceId == stackName))
{
// event signals stack creation/update completion; time to stop
active = false;
success = IsSuccessfulFinalStackEvent(evt);
break;
}
}
RenderEvents();
}
if (!success)
{
return(Stack : null, Success : false);
}
// describe stack and report any output values
var description = await cfnClient.DescribeStacksAsync(new DescribeStacksRequest {
StackName = stackName
});
return(Stack : description.Stacks.FirstOrDefault(), Success : success);
// local function
string TranslateLogicalIdToFullName(string logicalId)
{
var fullName = logicalId;
nameMappings?.ResourceNameMappings?.TryGetValue(logicalId, out fullName);
return(fullName ?? logicalId);
}
string TranslateResourceTypeToFullName(string awsType)
{
var fullName = awsType;
nameMappings?.TypeNameMappings?.TryGetValue(awsType, out fullName);
return(fullName ?? awsType);
}
void RenderEvents()
{
if (Settings.UseAnsiConsole)
{
if (ansiLinesPrinted > 0)
{
Console.Write(AnsiTerminal.MoveLineUp(ansiLinesPrinted));
}
var maxResourceStatusLength = eventList.Any() ? eventList.Max(evt => evt.ResourceStatus.ToString().Length) : 0;
var maxResourceTypeNameLength = eventList.Any() ? eventList.Max(evt => TranslateResourceTypeToFullName(evt.ResourceType).Length) : 0;
foreach (var evt in eventList)
{
var resourceStatus = evt.ResourceStatus.ToString();
var resourceType = TranslateResourceTypeToFullName(evt.ResourceType);
if (_ansiStatusColorCodes.TryGetValue(evt.ResourceStatus, out var ansiColor))
{
// print resource status
Console.Write(ansiColor);
Console.Write(resourceStatus);
Console.Write(AnsiTerminal.Reset);
Console.Write("".PadRight(maxResourceStatusLength - resourceStatus.Length + 4));
// print resource type
Console.Write(resourceType);
Console.Write("".PadRight(maxResourceTypeNameLength - resourceType.Length + 4));
// print resource name
Console.Write(TranslateLogicalIdToFullName(evt.LogicalResourceId));
// print status reason
if ((logError == null) && (evt.ResourceStatusReason != null))
{
Console.Write($" ({evt.ResourceStatusReason})");
}
}
else
{
Console.Write($"{resourceStatus} {resourceType} {TranslateLogicalIdToFullName(evt.LogicalResourceId)}{(evt.ResourceStatusReason != null ? $" ({evt.ResourceStatusReason})" : "")}");
}
Console.Write(AnsiTerminal.ClearEndOfLine);
Console.WriteLine();
}
ansiLinesPrinted = eventList.Count;
}
}
void UpdateEvent(StackEvent evt)
{
if (Settings.UseAnsiConsole)
{
var index = eventList.FindIndex(e => e.LogicalResourceId == evt.LogicalResourceId);
if (index < 0)
{
eventList.Add(evt);
}
else
{
eventList[index] = evt;
}
}
else
{
Console.WriteLine($"{evt.ResourceStatus,-35} {TranslateResourceTypeToFullName(evt.ResourceType),-55} {TranslateLogicalIdToFullName(evt.LogicalResourceId)}{(evt.ResourceStatusReason != null ? $" ({evt.ResourceStatusReason})" : "")}");
}
// capture failed operation as an error
switch (evt.ResourceStatus)
{
case "CREATE_FAILED":
case "ROLLBACK_FAILED":
case "UPDATE_FAILED":
case "DELETE_FAILED":
case "UPDATE_ROLLBACK_FAILED":
case "UPDATE_ROLLBACK_IN_PROGRESS":
if (evt.ResourceStatusReason != "Resource creation cancelled")
{
logError?.Invoke($"{evt.ResourceStatus} {TranslateLogicalIdToFullName(evt.LogicalResourceId)} [{TranslateResourceTypeToFullName(evt.ResourceType)}]: {evt.ResourceStatusReason}", /*Exception*/ null);
}
break;
}
}
}