I have an existing function app to which that I need to deploy a serviceBusTrigger function after user action in the application. To do this, I have been using the following post Deploy Azure function from code (c#).
Azure function version 2.0 for this function app
I am currently creating a zip containing /function.json that is being posted to the api/zip endpoint using the following method
public void CreateAzureFunctionToMonitorQueue(string functionName, string serviceBusQueueName, string path)
{
// create zip of new function
// ZipFile.CreateFromDirectory will create a zip with the directory's name containing the directory's contents
// so CreateZipOfFunc creates a structure <functionName>/<functionName>/function.json
// so that the zip contains <functionName>/function.json
// which is the required input for api/zip/ from kudu api
var zipFile = CreateZipOfFunc(functionName, serviceBusQueueName, path);
var file = File.ReadAllBytes(zipFile);
MemoryStream stream = new MemoryStream(file);
using (var client = new HttpClient())
{
// deploy zip using Kudu REST api
client.DefaultRequestHeaders.Add("Authorization", "Basic " + _base64Auth);
var baseUrl = new Uri($"https://{_webFunctionAppName}.scm.azurewebsites.net/");
var requestURl = baseUrl + "api/zip/site/wwwroot";
var httpContent = new StreamContent(stream);
var response = client.PutAsync(requestURl, httpContent).Result;
}
// remove files
Directory.Delete($"{path}{functionName}", true);
File.Delete($"{path}{functionName}.zip");
// deployment using Kudu REST api requires the function triggers to be manually synced
SyncTriggers();
}
At the end, I run SyncTriggers which manually syncs the function app's trigger because I read that deploying this way requires this for all trigger except http, found here https://docs.microsoft.com/en-us/azure/azure-functions/functions-deployment-technologies. I am using the second method of manually syncing triggers. Below is the method
public void SyncTriggers()
{
using (var client = new HttpClient())
{
var requestUrl = $"https://{_webFunctionAppName}.azurewebsites.net/admin/host/synctriggers?code={_MASTER_KEY}";
var httpContent = new StringContent("");
var response = client.PostAsync(requestUrl, httpContent).Result;
}
}
The result of both requests is successful, and when I look in the azure portal, the new function is there with a function.json file that matches a working serviceBusTrigger when deployed using Visual Studio webdeploy.
For testing this, I first disable the working azure function, run the above code and then push a new message to the monitored queue; however, nothing happens when the message becomes active.
If I enable the function deployed using VS that already existed, that function will fire and handle the message.
Existing function's function.json file looks like the following
{
"generatedBy": "Microsoft.NET.Sdk.Functions-1.0.26",
"configurationSource": "attributes",
"bindings": [
{
"type": "serviceBusTrigger",
"connection": "ServiceBusConnection",
"queueName": "myqueue",
"name": "queueItem"
}
],
"disabled": false,
"scriptFile": "../bin/MyProject.MyLibrary.dll",
"entryPoint": "MyProject.MyLibrary.MyClass.RunAsync"
}
The function deployed using the above method has a function.json like the following
{
"generatedBy": "Microsoft.NET.Sdk.Functions - 1.0.26",
"configurationSource": "attributes",
"bindings": [
{
"type": "serviceBusTrigger",
"connection": "ServiceBusConnection",
"queueName": "myqueue",
"name": "queueItem"
}
],
"disabled": false,
"scriptFile": "../bin/MyProject.MyLibrary.dll",
"entryPoint": "MyProject.MyLibrary.MyClass.RunAsync"
}
Am I missing something? My use case for this is, after I create a new queue, I want to create a monitoring azure function to listen to it. Creating the queue using NameSpaceManager works fine and pushing messages to it works fine as well. I just can't seem to get this test case working where I am creating a function to monitor an existing queue.
Possibly the function is not register and properly setup when I am calling SyncTrigger??
Thanks
Edit: I just saw this post https://blogs.msdn.microsoft.com/benjaminperkins/2018/08/07/why-does-my-azure-function-sometimes-stop-being-triggered/ which says:
Your endpoint must trigger/bind to only one Azure Function
Does that mean that I can only have one function registered to a function in my uploaded dll? Should I instead upload a copy of the entrypoint method I want with a different name as a .csx with the function.json file?
Edit2: That seems to just be related to az fns to binding resource, does not seem to help
Edit3: After a lot of research, it seems that the configurationSource for my generated function.json should not be "attributes" but instead "config". Going to test this now.
Edit4: The issue was fixed by removing generatedBy and changing configurationSource to "config" in the function.json file I am generating.
Edit5: removed misleading questions
