REGION_ID is a code that Google assigns based on
the region you select when you create your app. Including
REGION_ID.r in App Engine URLs is optional for
existing apps and will soon be required for all new apps.
To ensure a smooth transition, we are slowly updating App Engine to use region IDs. If we haven't updated your Google Cloud project yet, you won't see a region ID for your app. Since the ID is optional for existing apps, you don't need to update URLs or make other changes once the region ID is available for your existing apps.
Learn more about region IDs.
This page shows you how to deploy a basic App Engine application that displays a short message. For a more in-depth introduction to Go on App Engine, see Building an App.
Is App Engine the right computing option for you? See other options for hosting your application on Google Cloud.
There are no costs associated with running this guide. Running this sample app alone does not exceed your free quota.
Before you begin
Before running and deploying this quickstart, install the Cloud SDK and then set up a Cloud project for App Engine:
Download and install Cloud SDK:
gcloud components update
Create a new project:
gcloud projects create [YOUR_PROJECT_ID] --set-as-default
[YOUR_PROJECT_ID]with a string of characters that uniquely identifies your project. For example,
Verify the project was created:
gcloud projects describe [YOUR_PROJECT_ID]
You see project details that might look like the following:
createTime: year-month-hour lifecycleState: ACTIVE name: project-name parent: id: '433637338589' type: organization projectId: project-name-id projectNumber: 499227785679
Initialize your App Engine app with your project and choose its region:
gcloud app create --project=[YOUR_PROJECT_ID]
When prompted, select the region where you want your App Engine application located.
Make sure billing is enabled for your project. A billing account needs to be linked to your project in order for the application to be deployed to App Engine.
Install the following prerequisites:
Run the following command to install the gcloud component that includes the App Engine extension for Go 1.12+:
gcloud components install app-engine-go
App Engine locations
App Engine is regional, which means the infrastructure that runs your apps is located in a specific region, and Google manages it so that it is available redundantly across all of the zones within that region.
Meeting your latency, availability, or durability requirements are primary factors for selecting the region where your apps are run. You can generally select the region nearest to your app's users, but you should consider the locations where App Engine is available as well as the locations of the other Google Cloud products and services that your app uses. Using services across multiple locations can affect your app's latency as well as its pricing.
You cannot change an app's region after you set it.
If you already created an App Engine application, you can view its region by doing one of the following:
gcloud app describecommand.
Open the App Engine Dashboard in the Cloud Console. The region appears near the top of the page.
This quickstart assumes that you are familiar with the Go programming language and that you have installed Go.
Download the Hello World app
We've created a simple Hello World app for Go so you can quickly get a feel for deploying an app to Google Cloud. Follow these steps to download the Hello World app to your local machine.
Download the sample app and navigate into the app directory:
Clone the Hello World sample app repository:
git clone https://github.com/GoogleCloudPlatform/golang-samples.git
Alternatively, download the sample as a zip file and extract it.
Change to the directory that contains the sample code:
Deploying Hello World to App Engine
Deploy the Hello World app on App Engine by running the following command from the
gcloud app deploy
View the live app at
gcloud app browse
The message Hello, World! is now delivered by a web server running on an App Engine instance.
Congratulations! You've successfully deployed a Go web service on App Engine!
If you want to continue learning about App Engine, you can keep your Cloud project and follow along with Building an App.
Alternatively, you can delete your Cloud project to stop billing for all the resources used within that project.
- In the Cloud Console, go to the Manage resources page.
- In the project list, select the project that you want to delete and then click Delete delete.
- In the dialog, type the project ID and then click Shut down to delete the project.
Now that you have experience deploying a web service on App Engine, get a more in-depth introduction to Go on App Engine by reading Building an App.