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I'm trying to set up an Azure function that can trigger a Azure devops build pipeline. But I'm not sure on how to proceed with this and if it's even possible to do so.

I already have a build pipeline ready to be used but the conventional triggers that are already provided by Azure devops cannot be used. I can't disclose the reason but I need to trigger it using an Azure function. Any help regarding this would be really helpful.

Thanks.

Shashank B S
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3 Answers3

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You can simply use the REST APIs of Azure DevOps and call those from your function. See here: API for automating Azure DevOps Pipelines?

silent
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How to proceed with this and if it's even possible to do so.

Of course, it can do to trigger a Azure Devops pipeline by Azure function.

To achieve this, you will use Visual Studio also, better with the version 2017 or higher , and also installed .Net Core SDK and Develop Azure Functions using Visual Studio.

  1. In the Azure Function App you created, open HttpTrigger1, and click Get Function Url. This is a key point, so better save it in the txt. Because as this execution, Azure Function just act as a switching proxy or mechanism.

  2. Create a Azure Function project in Visual studio. In template, choose HttpTrigger template, Azure Functions v1 (.NET Framework) from the framework dropdown.

  3. Open .cs file and input the below script in it:

          using System;
      using System.Linq;
      using System.Net;
      using System.Net.Http;
      using System.Threading.Tasks;
      using Microsoft.Azure.WebJobs;
      using Microsoft.Azure.WebJobs.Extensions.Http;
      using Microsoft.Azure.WebJobs.Host;
      namespace PartsUnlimited.AzureFunction
     {
     public static class Function1
     {
         [FunctionName("HttpTriggerCSharp1")]
         public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route =
null)]HttpRequestMessage req, TraceWriter log)
         {
             var userIdKey = req.GetQueryNameValuePairs().FirstOrDefault(q =>
string.Equals(q.Key, "UserId", StringComparison.OrdinalIgnoreCase));
             var userId = string.IsNullOrEmpty(userIdKey.Value) ? int.MaxValue : Convert.ToInt64(userIdKey.Value);
             var url = $"https://<<APIAppServiceUrl>>/api/{(userId > 10 ? "v1" : "v2")}/specials/GetSpecialsByUserId?id={userId}";
             using (HttpClient httpClient = new HttpClient())
             {
                 return await httpClient.GetAsync(url);
             }
         }
     }
    }

  4. Replace <<APIAppServiceUrl>> with your AzureWebsite.net URL.

  5. Go xxxxWebsite->Controllers->StoreController.cs, replace the url variable in line 46 with your Function url which copied in Step 1.

  6. Click Commit and Push All to push the changes to the Azure Devops repository.

  7. Create a build pipeline, and enable CI. And also, create release pipeline, add deloy Azure App task and enable CD.

That's all the steps you need to create. There has been a blog which written by our Azure DevOps Labs and it has the detailed steps, you can refer to it.

Mengdi Liang
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REST API can be easily invoked from an azure function.

You can pretty much deploy a whole infrastructure as well as deploy the code just based on a function call using azure DevOps.

Refer this for more information: https://learn.microsoft.com/en-us/rest/api/azure/devops/

Venura Athukorala
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