I have a function app function subscribed to an event grid topic, I get publish failures so the function never executes. I have managed identity Event Grid Data Sender and Event Grid Subscription Reader and EG Topic shows publish Fail as per snapshot below.
I have followed this process to authorize the function app but I get Unauthorized.
Subscription Func App func to EG Topic:
Func app Managed Identity is ON and added to the Resource Group where EG and Func app live:
Addition of RBAC managed identity for function app further confirmed in roles of func app:
Subscribed function to EG Topic in func app:
[FunctionName("broadcast")]
public static async Task SendMessage(
[EventGridTrigger] EventGridEvent eventGridEvent,
[SignalR(HubName = "dttelemetry")] IAsyncCollector<SignalRMessage> signalRMessages,
ILogger log)
{
bool broadcast_alert = false;
bool broadcast_ledState = false;
var telemetryMessage = new Dictionary<object, object>();
log.LogInformation("At top Broadcast");
var egevent = JsonConvert.DeserializeObject<Dictionary<object, object>>(eventGridEvent.Data.ToString());
if (eventGridEvent.EventType.Contains("telemetry"))
{
partId = "MachinePart1";
if (!b_debug_contractor) log.LogInformation("At broadcast - EvenType is Telemetry");
foreach (var telemetryProperty in egevent)
{
if (!b_debug_contractor) log.LogInformation("broadcast log at telemetry type:" + telemetryProperty.Key + " - " + telemetryProperty.Value);
telemetryMessage.Add(telemetryProperty.Key, telemetryProperty.Value);
}
try
{
//log.LogInformation("Success adding broadcast target with args:" + telemetryMessage.ToString());
await signalRMessages.AddAsync(
new SignalRMessage
{
Target = "TelemetryMessage",
Arguments = new[] { telemetryMessage }
//Arguments = new[] { output }
});
log.LogWarning("Success Send telemetry transform data to H2");
}
catch (Exception e)
{
log.LogInformation("Exception - Failed to send broadcast telemetry data to H2:" + e.Message);
}
}
else if (eventGridEvent.EventType.Contains("Twin.Update"))
{
log.LogInformation("At broadcast - EvenType is Twin.Update");
foreach (var twinProperty in egevent)
{
if (!b_debug_contractor)
log.LogInformation("broadcast log at Twin.Update type:" + twinProperty.Key + " - " + twinProperty.Value);
if (twinProperty.Key.ToString() == "/Alert")
{
alert = (bool)twinProperty.Value;
broadcast_alert = true;
if (!b_debug_contractor) log.LogInformation("I've set broadcast_alert to " + broadcast_alert);
}
if (twinProperty.Key.ToString() == "/ledState")
{
ledState = (bool)twinProperty.Value;
broadcast_ledState = true;
if (!b_debug_contractor)
log.LogInformation("I've set broadcast_ledState to " + broadcast_ledState);
}
}
var propertyMessage = new Dictionary<object, object>();
if (broadcast_alert && broadcast_ledState)
{
propertyMessage.Add("PartID", partId);
propertyMessage.Add("Alert", alert);
propertyMessage.Add("LedState", ledState);
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding alert's PartID to: {partId}");
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding alert to: {alert}");
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding ledState to: {ledState}");
}
else if (broadcast_alert && !broadcast_ledState)
{
propertyMessage.Add("PartID", partId);
propertyMessage.Add("Alert", alert);
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding alert's PartID to: {partId}");
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding alert to: {alert}");
}
else if (!broadcast_alert && broadcast_ledState)
{
propertyMessage.Add("PartID", partId);
propertyMessage.Add("LedState", ledState);
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding alert's PartID to: {partId}");
if (!b_debug_contractor)
log.LogInformation($"SingalRFunction - adding ledState to: {ledState}");
}
try
{
await signalRMessages.AddAsync(
new SignalRMessage
{
Target = "PropertyMessage",
Arguments = new[] { propertyMessage }
});
log.LogWarning("Success Send Twin.Update transform data to H2");
}
catch (Exception e)
{
log.LogInformation("Exception at SingalRFunction Twin.Update: " + e.Message);
}
}
else if (eventGridEvent.EventType.Contains("broadcastTransform"))
{
var transformMessage = new Dictionary<object, object>();
log.LogInformation("At broadcast - EvenType is broadcastTransform");
foreach (var transformProperty in egevent)
{
if (!b_debug_contractor) log.LogInformation("broadcast log at broadcastTransform type:" + transformProperty.Key + " - " + transformProperty.Value);
transformMessage.Add(transformProperty.Key, transformProperty.Value);
}
try
{
//log.LogInformation("Success adding broadcast target with args:" + telemetryMessage.ToString());
await signalRMessages.AddAsync(
new SignalRMessage
{
Target = "TransformMessage",
//Arguments = new[] { telemetryMessage }
Arguments = new[] { transformMessage }
});
log.LogWarning("Success Send broadcast transform data to H2.");
}
catch (Exception e)
{
log.LogInformation("Exception - Failed to send broadcastTransform data" + e.Message);
}
}
else
log.LogInformation("At Broadcast - Type not Recognized");
}
Unauth Error subscribed function:
{ "time": "2023-01-04T08:25:27.3783585Z", "resourceId": "/SUBSCRIPTIONS/XXXX/RESOURCEGROUPS/MY-RG/PROVIDERS/MICROSOFT.EVENTGRID/TOPICS/eventgridtopicname", "category": "PublishFailures", "operationName": "Post", "message": "inputEventsCount=null, requestUri=https://eventgridtopicname.eastus-1.eventgrid.azure.net/api/events, publisherInfo=publisherName=eventgridtopicname.EASTUS-1.EVENTGRID.AZURE.NET, category=User, inputSchema=EventGridEvent, armResourceId=/subscriptions/XXX/resourceGroups/my-rg/providers/Microsoft.EventGrid/topics/eventgridtopicname, filteringPolicy:DnsHost, emitAuditLogs=False, drBoundary=WithinGeopair, regionCategory=Primary, isPublishBlockedDueToDr=False, httpStatusCode=Unauthorized, errorType=Unauthorized, errorMessage=The request authorization key is not authorized for eventgridtopicname.EASTUS-1.EVENTGRID.AZURE.NET."}
