Continuous deployment to Azure with Visual Studio and Git with ASP.NET Core
By Erik Reitan
ASP.NET Core preview releases with Azure App Service
ASP.NET Core preview releases aren't deployed to Azure App Service by default. To host an app that uses an ASP.NET Core preview release, see Deploy ASP.NET Core preview release to Azure App Service.
This tutorial shows how to create an ASP.NET Core web app using Visual Studio and deploy it from Visual Studio to Azure App Service using continuous deployment.
See also Create your first pipeline with Azure Pipelines, which shows how to configure a continuous delivery (CD) workflow for Azure App Service using Azure DevOps Services. Azure Pipelines (an Azure DevOps Services service) simplifies setting up a robust deployment pipeline to publish updates for apps hosted in Azure App Service. The pipeline can be configured from the Azure portal to build, run tests, deploy to a staging slot, and then deploy to production.
This tutorial assumes the following software is installed:
Create an ASP.NET Core web app
Start Visual Studio.
From the File menu, select New > Project.
Select the ASP.NET Core Web Application project template. It appears under Installed > Templates > Visual C# > .NET Core. Name the project
SampleWebAppDemo. Select the Create new Git repository option and click OK.
In the New ASP.NET Core Project dialog, select the ASP.NET Core Empty template, then click OK.
The most recent release of .NET Core is 2.0.
Running the web app locally
Once Visual Studio finishes creating the app, run the app by selecting Debug > Start Debugging. As an alternative, press F5.
It may take time to initialize Visual Studio and the new app. Once it's complete, the browser shows the running app.
After reviewing the running Web app, close the browser and select the "Stop Debugging" icon in the toolbar of Visual Studio to stop the app.
Create a web app in the Azure Portal
The following steps create a web app in the Azure Portal:
Log in to the Azure Portal.
Select NEW at the top left of the portal interface.
Select Web + Mobile > Web App.
In the Web App blade, enter a unique value for the App Service Name.
The App Service Name name must be unique. The portal enforces this rule when the name is provided. If providing a different value, substitute that value for each occurrence of SampleWebAppDemo in this tutorial.
Also in the Web App blade, select an existing App Service Plan/Location or create a new one. If creating a new plan, select the pricing tier, location, and other options. For more information on App Service plans, see Azure App Service plans in-depth overview.
Select Create. Azure will provision and start the web app.
Enable Git publishing for the new web app
Git is a distributed version control system that can be used to deploy an Azure App Service web app. Web app code is stored in a local Git repository, and the code is deployed to Azure by pushing to a remote repository.
Log into the Azure Portal.
Select App Services to view a list of the app services associated with the Azure subscription.
Select the web app created in the previous section of this tutorial.
In the Deployment blade, select Deployment options > Choose Source > Local Git Repository.
If deployment credentials for publishing a web app or other App Service app haven't previously been set up, set them up now:
- Select Settings > Deployment credentials. The Set deployment credentials blade is displayed.
- Create a user name and password. Save the password for later use when setting up Git.
- Select Save.
In the Web App blade, select Settings > Properties. The URL of the remote Git repository to deploy to is shown under GIT URL.
Copy the GIT URL value for later use in the tutorial.
Publish the web app to Azure App Service
In this section, create a local Git repository using Visual Studio and push from that repository to Azure to deploy the web app. The steps involved include the following:
- Add the remote repository setting using the GIT URL value, so the local repository can be deployed to Azure.
- Commit project changes.
- Push project changes from the local repository to the remote repository on Azure.
In Solution Explorer right-click Solution 'SampleWebAppDemo' and select Commit. The Team Explorer is displayed.
In Team Explorer, select the Home (home icon) > Settings > Repository Settings.
In the Remotes section of the Repository Settings, select Add. The Add Remote dialog box is displayed.
Set the Name of the remote to Azure-SampleApp.
Set the value for Fetch to the Git URL that copied from Azure earlier in this tutorial. Note that this is the URL that ends with .git.
As an alternative, specify the remote repository from the Command Window by opening the Command Window, changing to the project directory, and entering the command. Example:
git remote add Azure-SampleApp https://firstname.lastname@example.org:443/SampleApp.git
Select the Home (home icon) > Settings > Global Settings. Confirm that the name and email address are set. Select Update if required.
Select Home > Changes to return to the Changes view.
Enter a commit message, such as Initial Push #1 and select Commit. This action creates a commit locally.
As an alternative, commit changes from the Command Window by opening the Command Window, changing to the project directory, and entering the git commands. Example:
git add .
git commit -am "Initial Push #1"
Select Home > Sync > Actions > Open Command Prompt. The command prompt opens to the project directory.
Enter the following command in the command window:
git push -u Azure-SampleApp master
Enter the Azure deployment credentials password created earlier in Azure.
This command starts the process of pushing the local project files to Azure. The output from the above command ends with a message that the deployment was successful.
remote: Finished successfully. remote: Running post deployment command(s)... remote: Deployment successful. To https://email@example.com:443/SampleWebAppDemo01.git * [new branch] master -> master Branch master set up to track remote branch master from Azure-SampleApp.
If collaboration on the project is required, consider pushing to GitHub before pushing to Azure.
Verify the Active Deployment
Verify that the web app transfer from the local environment to Azure is successful.
In the Azure Portal, select the web app. Select Deployment > Deployment options.
Run the app in Azure
Now that the web app is deployed to Azure, run the app.
This can be accomplished in two ways:
- In the Azure Portal, locate the web app blade for the web app. Select Browse to view the app in the default browser.
- Open a browser and enter the URL for the web app. Example:
Update the web app and republish
After making changes to the local code, republish:
In Solution Explorer of Visual Studio, open the Startup.cs file.
Configuremethod, modify the
Response.WriteAsyncmethod so that it appears as follows:
await context.Response.WriteAsync("Hello World! Deploy to Azure.");
Save the changes to Startup.cs.
In Solution Explorer, right-click Solution 'SampleWebAppDemo' and select Commit. The Team Explorer is displayed.
Enter a commit message, such as
Press the Commit button to commit the project changes.
Select Home > Sync > Actions > Push.
As an alternative, push the changes from the Command Window by opening the Command Window, changing to the project directory, and entering a git command. Example:
git push -u Azure-SampleApp master
View the updated web app in Azure
View the updated web app by selecting Browse from the web app blade in the Azure Portal or by opening a browser and entering the URL for the web app. Example: