Deploy Cloud Functions from the CLI

Intermediate10 min

Create and deploy serverless functions on Google Cloud Functions with HTTP and event-based triggers.

Prerequisites

-gcloud CLI installed
-GCP project with billing enabled
-Cloud Functions API enabled

Steps

Enable the Cloud Functions API

Enables Cloud Functions and Cloud Build APIs.

$ gcloud services enable cloudfunctions.googleapis.com cloudbuild.googleapis.com

Create a function source file

Creates a minimal HTTP-triggered function.

$ mkdir my-function && echo 'exports.helloWorld = (req, res) => { res.send("Hello from Cloud Functions!"); };' > my-function/index.js

Deploy the function

Deploys a 2nd-gen Cloud Function with an HTTP trigger accessible without authentication.

$ gcloud functions deploy helloWorld --runtime nodejs20 --trigger-http --allow-unauthenticated --source ./my-function --region us-central1 --gen2

Always use --gen2 for new functions. Gen 2 runs on Cloud Run infrastructure with better performance.

Test the function

Invokes the function and prints the response.

$ gcloud functions call helloWorld --region us-central1 --gen2

View function logs

Displays the most recent 20 log entries for the function.

$ gcloud functions logs read helloWorld --region us-central1 --gen2 --limit 20

Full Script

full-script.sh

# Deploy Cloud Functions
gcloud services enable cloudfunctions.googleapis.com cloudbuild.googleapis.com
mkdir -p my-function
echo 'exports.helloWorld = (req, res) => { res.send("Hello from Cloud Functions!"); };' > my-function/index.js
gcloud functions deploy helloWorld --runtime nodejs20 --trigger-http --allow-unauthenticated --source ./my-function --region us-central1 --gen2
gcloud functions call helloWorld --region us-central1 --gen2
gcloud functions logs read helloWorld --region us-central1 --gen2 --limit 20

FAQ

Discussion

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# Deploy Cloud Functions gcloud services enable cloudfunctions.googleapis.com cloudbuild.googleapis.com mkdir -p my-function echo 'exports.helloWorld = (req, res) => { res.send("Hello from Cloud Functions!"); };' > my-function/index.js gcloud functions deploy helloWorld --runtime nodejs20 --trigger-http --allow-unauthenticated --source ./my-function --region us-central1 --gen2 gcloud functions call helloWorld --region us-central1 --gen2 gcloud functions logs read helloWorld --region us-central1 --gen2 --limit 20