Create a 1st gen Cloud Run function by using the Google Cloud CLI

Create a 1st gen Cloud Run function by using the Google Cloud CLI

Note: This content applies only to Cloud Run functions (1st gen)—formerly Cloud Functions (1st gen).

For the Cloud Run functions version of this document, see Create a Cloud Run function by using the Google Cloud CLI.

This page shows you how to create and deploy a 1st gen Cloud Run function using the Google Cloud CLI.

Before you begin

1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

3. Make sure that billing is enabled for your Google Cloud project.

4. Enable the Cloud Functions and Cloud Build APIs.

   Enable the APIs

5. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

6. Make sure that billing is enabled for your Google Cloud project.

7. Enable the Cloud Functions and Cloud Build APIs.

   Enable the APIs

8. Install and initialize the gcloud CLI.
9. Update gcloud components:

   gcloud components update

Need a command prompt? You can use the Google Cloud Shell. The Google Cloud Shell is a command line environment that already includes the Google Cloud CLI, so you don't need to install it. The Google Cloud CLI also comes preinstalled on Google Compute Engine Virtual Machines.

10. Prepare your development environment.

    Node.js

    Go to the Node.js setup guide

    Python

    Go to the Python setup guide

    Go

    Go to the Go setup guide

    Java

    Go to the Java setup guide

    C#

    Go to the .NET setup guide

    Ruby

    Go to the Ruby setup guide

    PHP

    Go to Using PHP on Google Cloud

Get the sample code

1. Clone the sample repository to your local machine:

   Node.js

   git clone https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   Python

   git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   Go

   git clone https://github.com/GoogleCloudPlatform/golang-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   Java

   git clone https://github.com/GoogleCloudPlatform/java-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   C#

   git clone https://github.com/GoogleCloudPlatform/dotnet-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   Ruby

   git clone https://github.com/GoogleCloudPlatform/ruby-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

   PHP

   git clone https://github.com/GoogleCloudPlatform/php-docs-samples.git

   Alternatively, you can download the sample as a zip file and extract it.

2. Change to the directory that contains the Cloud Run functions sample code:

   Node.js

   cd nodejs-docs-samples/functions/helloworld/

   Python

   cd python-docs-samples/functions/helloworld/

   Go

   cd golang-samples/functions/helloworld/

   Java

   cd java-docs-samples/functions/helloworld/helloworld/

   C#

   cd dotnet-docs-samples/functions/helloworld/HelloWorld/

   Ruby

   cd ruby-docs-samples/functions/helloworld/get/

   PHP

   cd php-docs-samples/functions/helloworld_get/

3. Take a look at the sample code:

   Node.js

   const functions = require('@google-cloud/functions-framework');
   
   // Register an HTTP function with the Functions Framework that will be executed
   // when you make an HTTP request to the deployed function's endpoint.
   functions.http('helloGET', (req, res) => {
     res.send('Hello World!');
   });

   Python

   import functions_framework
   
   @functions_framework.http
   def hello_get(request):
       """HTTP Cloud Function.
       Args:
           request (flask.Request): The request object.
           <https://flask.palletsprojects.com/en/1.1.x/api/#incoming-request-data>
       Returns:
           The response text, or any set of values that can be turned into a
           Response object using `make_response`
           <https://flask.palletsprojects.com/en/1.1.x/api/#flask.make_response>.
       Note:
           For more information on how Flask integrates with Cloud
           Functions, see the `Writing HTTP functions` page.
           <https://cloud.google.com/functions/docs/writing/http#http_frameworks>
       """
       return "Hello World!"
   
   

   Go

   
   // Package helloworld provides a set of Cloud Functions samples.
   package helloworld
   
   import (
   	"fmt"
   	"net/http"
   )
   
   // HelloGet is an HTTP Cloud Function.
   func HelloGet(w http.ResponseWriter, r *http.Request) {
   	fmt.Fprint(w, "Hello, World!")
   }
   

   Java

   
   package functions;
   
   import com.google.cloud.functions.HttpFunction;
   import com.google.cloud.functions.HttpRequest;
   import com.google.cloud.functions.HttpResponse;
   import java.io.BufferedWriter;
   import java.io.IOException;
   
   public class HelloWorld implements HttpFunction {
     // Simple function to return "Hello World"
     @Override
     public void service(HttpRequest request, HttpResponse response)
         throws IOException {
       BufferedWriter writer = response.getWriter();
       writer.write("Hello World!");
     }
   }

   C#

   using Google.Cloud.Functions.Framework;
   using Microsoft.AspNetCore.Http;
   using System.Threading.Tasks;
   
   namespace HelloWorld;
   
   public class Function : IHttpFunction
   {
       public async Task HandleAsync(HttpContext context)
       {
           await context.Response.WriteAsync("Hello World!", context.RequestAborted);
       }
   }

   Ruby

   require "functions_framework"
   
   FunctionsFramework.http "hello_get" do |_request|
     # The request parameter is a Rack::Request object.
     # See https://www.rubydoc.info/gems/rack/Rack/Request
   
     # Return the response body as a string.
     # You can also return a Rack::Response object, a Rack response array, or
     # a hash which will be JSON-encoded into a response.
     "Hello World!"
   end

   PHP

   
   use Psr\Http\Message\ServerRequestInterface;
   
   function helloGet(ServerRequestInterface $request): string
   {
       return 'Hello, World!' . PHP_EOL;
   }
   

Deploy a function

To deploy the function with an HTTP trigger, run the following command in the directory containing your function:

Node.js

gcloud functions deploy helloGET \
--runtime nodejs22 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported Node.js version to run your function.

Python

gcloud functions deploy hello_get \
--runtime python312 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported Python version to run your function.

Go

gcloud functions deploy HelloGet \
--runtime go122 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported Go version to run your function.

Java

gcloud functions deploy java-helloworld \
--entry-point functions.HelloWorld \
--runtime java21 \
--memory 512MB --trigger-http

Use the --runtime flag to specify the runtime ID of a supported Java version to run your function.

C#

gcloud functions deploy csharp-helloworld \
--entry-point HelloWorld.Function \
--runtime dotnet8 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported .NET version to run your function.

Ruby

gcloud functions deploy hello_get --runtime ruby33 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported Ruby version to run your function.

PHP

 gcloud functions deploy helloGet --runtime php83 --trigger-http

Use the --runtime flag to specify the runtime ID of a supported PHP version to run your function.

You can optionally use the --allow-unauthenticated flag to reach the function without authentication. This is useful for testing, but we don't recommend using this setting in production unless you are creating a public API or website. Further, it might not work for you, depending on your corporate policy settings. See Authenticating for invocation for details on how to invoke a function that requires authentication.

Test the function

1. When the function finishes deploying, take note of the httpsTrigger's url property or find it using the following command:

   Node.js

   gcloud functions describe helloGET --format="value(httpsTrigger.url)"

   Python

   gcloud functions describe hello_get --format="value(httpsTrigger.url)"

   Go

   gcloud functions describe HelloGet --format="value(httpsTrigger.url)"

   Java

   gcloud functions describe java-helloworld --format="value(httpsTrigger.url)"

   C#

   gcloud functions describe csharp-helloworld --format="value(httpsTrigger.url)"

   Ruby

   gcloud functions describe hello_get --format="value(httpsTrigger.url)"

   PHP

   gcloud functions describe helloGet --format="value(httpsTrigger.url)"

   It should look like this:

   Node.js

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/helloGET

   Python

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/hello_get

   Go

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/HelloGet

   Java

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/java-helloworld

   C#

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/csharp-helloworld

   Ruby

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/hello_get

   PHP

   https://GCP_REGION-PROJECT_ID.cloudfunctions.net/helloGet

2. Visit this URL in your browser. You should see a Hello World! message.

Delete the function

To delete the function, run the following command:

Node.js

gcloud functions delete helloGET 

Python

gcloud functions delete hello_get 

Go

gcloud functions delete HelloGet 

Java

gcloud functions delete java-helloworld 

C#

gcloud functions delete csharp-helloworld 

Ruby

gcloud functions delete hello_get 

PHP

gcloud functions delete helloGet 

What's next

See the relevant Your First Function guide for the runtime of your choice to learn how to set up your development environment, create a new function from scratch, specify dependencies, deploy your function, test your function, and view logs. Note that these guides are for Cloud Run functions (1st gen) only:

• Your First Function: Node.js
• Your First Function: Python
• Your First Function: Go
• Your First Function: Java
• Your First Function: .NET
• Your First Function: Ruby
• Your First Function: PHP