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App Engine: Qwik Start - Go

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App Engine: Qwik Start - Go

20 minutes 1 Credit

GSP070

Google Cloud Self-Paced Labs

Overview

App Engine allows developers to focus on doing what they do best, writing code. The App Engine standard environment is based on container instances running on Google's infrastructure. Containers are preconfigured with one of several available runtimes (Java 7, Java 8, Python 2.7, Go and PHP). Each runtime also includes libraries that support App Engine Standard APIs. For many applications, the standard environment runtimes and libraries might be all you need.

App Engine offers you a choice between two Go language environments. Both environments have the same code-centric developer workflow, scale quickly and efficiently to handle increasing demand, and enable you to use Google’s proven serving technology to build your web, mobile and IoT applications quickly and with minimal operational overhead. While the two environments have a lot in common, they differ in a few important ways.

The App Engine standard environment makes it easy to build and deploy an application that runs reliably under heavy load and with large amounts of data. Your application runs within its own secure, reliable environment that is independent of the hardware, operating system, or physical location of the server. It supports Go 1.11.

The App Engine flexible environment is based on Compute Engine and automatically scales your app up and down while balancing the load.

This hands-on lab shows you how to create a small App Engine application that displays a short message.

What you'll do

  • Download an application

  • Test the application

  • Deploy the application

Setup

Before you click the Start Lab button

Read these instructions. Labs are timed and you cannot pause them. The timer, which starts when you click Start Lab, shows how long Google Cloud resources will be made available to you.

This hands-on lab lets you do the lab activities yourself in a real cloud environment, not in a simulation or demo environment. It does so by giving you new, temporary credentials that you use to sign in and access Google Cloud for the duration of the lab.

What you need

To complete this lab, you need:

  • Access to a standard internet browser (Chrome browser recommended).
  • Time to complete the lab.

Note: If you already have your own personal Google Cloud account or project, do not use it for this lab.

Note: If you are using a Chrome OS device, open an Incognito window to run this lab.

How to start your lab and sign in to the Google Cloud Console

  1. Click the Start Lab button. If you need to pay for the lab, a pop-up opens for you to select your payment method. On the left is a panel populated with the temporary credentials that you must use for this lab.

    Open Google Console

  2. Copy the username, and then click Open Google Console. The lab spins up resources, and then opens another tab that shows the Sign in page.

    Sign in

    Tip: Open the tabs in separate windows, side-by-side.

  3. In the Sign in page, paste the username that you copied from the left panel. Then copy and paste the password.

    Important: You must use the credentials from the left panel. Do not use your Google Cloud Training credentials. If you have your own Google Cloud account, do not use it for this lab (avoids incurring charges).

  4. Click through the subsequent pages:

    • Accept the terms and conditions.
    • Do not add recovery options or two-factor authentication (because this is a temporary account).
    • Do not sign up for free trials.

After a few moments, the Cloud Console opens in this tab.

Activate Cloud Shell

Cloud Shell is a virtual machine that is loaded with development tools. It offers a persistent 5GB home directory and runs on the Google Cloud. Cloud Shell provides command-line access to your Google Cloud resources.

In the Cloud Console, in the top right toolbar, click the Activate Cloud Shell button.

Cloud Shell icon

Click Continue.

cloudshell_continue.png

It takes a few moments to provision and connect to the environment. When you are connected, you are already authenticated, and the project is set to your PROJECT_ID. For example:

Cloud Shell Terminal

gcloud is the command-line tool for Google Cloud. It comes pre-installed on Cloud Shell and supports tab-completion.

You can list the active account name with this command:

gcloud auth list

(Output)

Credentialed accounts: - <myaccount>@<mydomain>.com (active)

(Example output)

Credentialed accounts: - google1623327_student@qwiklabs.net

You can list the project ID with this command:

gcloud config list project

(Output)

[core] project = <project_ID>

(Example output)

[core] project = qwiklabs-gcp-44776a13dea667a6

Enable Google App Engine Admin API

The App Engine Admin API enables developers to provision and manage their App Engine Applications.

  1. In the left menu, click APIs & Services > Library.

APIs_Library.png

  1. Type "App Engine Admin API" in search box.
  2. Click App Engine Admin API.

e170aa8a1eb36686.png

  1. Click Enable.

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Download the Hello World app

There is a simple Hello World app for Go that you can use to quickly get a feel for deploying an app to Google Cloud. Follow these steps to download Hello World to your Google Cloud instance.

  1. Open a Cloud Shell session and enter the following command to clone the Hello World sample app repository:

git clone https://github.com/GoogleCloudPlatform/golang-samples.git
  1. Go to the directory that contains the sample code:

cd golang-samples/appengine/go11x/helloworld

Deploy your app

  1. To deploy your app to App Engine, run the following command from within the root directory of your application where the app.yaml file is located:

gcloud components install app-engine-go gcloud app deploy

(Sample output)

Please choose the region where you want your App Engine application located: [1] europe-west2 (supports standard and flexible) [2] us-east1 (supports standard and flexible) [3] us-east4 (supports standard and flexible) [4] asia-northeast1 (supports standard and flexible) [5] asia-south1 (supports standard and flexible) [6] australia-southeast1 (supports standard and flexible) [7] southamerica-east1 (supports standard and flexible) [8] us-central (supports standard and flexible) [9] europe-west3 (supports standard and flexible) [10] europe-west (supports standard and flexible) [11] cancel Please enter your numeric choice:
  1. Type the number for your region.

(Sample output)

Creating App Engine application in project [qwiklabs-gcp-58a2268dafa9e708] and region [asia-south1]....done. Services to deploy: descriptor: [/home/gcpstaging8142_student/helloworld/app.yaml] source: [/home/gcpstaging8142_student/helloworld] target project: [qwiklabs-gcp-58a2268dafa9e708] target service: [default] target version: [20171117t080909] target url: [https://qwiklabs-gcp-58a2268dafa9e708.appspot.com] Do you want to continue (Y/n)?
  1. Enter Y to confirm the deployment of service when prompted.

(Sample output)

Beginning deployment of service [default]... Some files were skipped. Pass `--verbosity=info` to see which ones. You may also view the gcloud log file, found at [/tmp/tmp.4CytrNBIMQ/logs/2017.11.17/08.06.15.720314.log]. ╔════════════════════════════════════════════════════════════╗ ╠═ Uploading 2 files to Google Cloud Storage ═╣ ╚════════════════════════════════════════════════════════════╝ File upload done. Updating service [default]...done. Waiting for operation [apps/qwiklabs-gcp-58a2268dafa9e708/operations/27b6d801-9018-4a86-b8c0-6082f78fb09f] to complete...done. Updating service [default]...done. Deployed service [default] to [https://qwiklabs-gcp-58a2268dafa9e708.appspot.com] You can stream logs from the command line by running: $ gcloud app logs tail -s default To view your application in the web browser run: $ gcloud app browse

View your application

To launch your browser, enter the following command:

gcloud app browse

Then click on the link it provides.

Sample output, note your link will be different:

1b33804af7789683

Your application is deployed and you can read the short message in your browser.

Click Check my progress to verify the objective.

Deploy your app.

Test your knowledge

Test your knowledge about Google cloud Platform by taking our quiz. (Please select multiple correct options if necessary.)

Congratulations!

Finish Your Quest

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This self-paced lab is part of the Qwiklabs Baseline: Deploy & Develop and Getting Started with Go on Google Cloud Quests. A Quest is a series of related labs that form a learning path. Completing this Quest earns you the badge above, to recognize your achievement. You can make your badge (or badges) public and link to them in your online resume or social media account. Enroll in either Quest and get immediate completion credit if you've taken this lab. See other available Qwiklabs Quests.

Take Your Next Lab

This lab is also part of a series of labs called Qwik Starts. These labs are designed to give you a little taste of the many features available with Google Cloud. Search for "Qwik Starts" in the lab catalog to find the next lab you'd like to take!

Next Steps /Learn More

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Manual Last Updated June 11, 2020
Lab Last Tested October 9, 2019

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