Deploy your app
App Engine: Qwik Start - Java
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 8, Python 3.7, 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.
The App Engine standard environment makes it easy to build and deploy an application that runs reliably even under heavy load and with large amounts of data. It includes the following features:
- Persistent storage with queries, sorting, and transactions.
- Automatic scaling and load balancing.
- Asynchronous task queues for performing work outside the scope of a request.
- Scheduled tasks for triggering events at specified times or regular intervals.
- Integration with other Google cloud services and APIs.
Applications run in a secure, sandboxed environment, allowing App Engine standard environment to distribute requests across multiple servers, and scaling servers to meet traffic demands. Your application runs within its own secure, reliable environment that is independent of the hardware, operating system, or physical location of the server.
This hands-on lab shows you how to create a small App Engine application that displays a short message.
What you'll do
In this lab you will learn how to:
- Download starter code from a GitHub repository.
- Run your application locally from a Cloud Shell session.
- Deploy your application with Google App Engine.
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.
To complete this lab, you need:
- Access to a standard internet browser (Chrome browser recommended).
- Time to complete the lab---remember, once you start, you cannot pause a lab.
How to start your lab and sign in to the Google Cloud Console
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.
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.
Tip: Open the tabs in separate windows, side-by-side.
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).
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.
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:
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:
You can list the project ID with this command:
Enable Google App Engine Admin API
The App Engine Admin API enables developers to provision and manage their App Engine Applications.
- In the left-hand menu click on APIs & Services > Library.
- Type "App Engine Admin API" in the search box.
- Click App Engine Admin API.
- Click Enable if it isn't already set. Your page should now resemble the following:
Download the Hello World app
We've created a simple
Hello World app written in Java so you can quickly get a feel for deploying an application to the Google Cloud. Follow these steps to download
Hello World to your temporary Google Cloud shell environment.
Open a Cloud Shell session and run the following command to clone the Hello World sample app repository:
Then go to the directory that contains the sample code:
In this folder you will find the
src directory that contains a package called
com.example.appengine.helloworld that implements a simple HTTP Servlet.
Test the application using the development server
To get the development server running, you'll download Maven to manage compiling your app and starting the development server.
Run the following commands to configure your Maven environment:
Enter the following Maven command to download and install Maven and run the app:
It will take a few minutes for Maven to download and install.
The development server is listening for requests on port 8080 when you see the following last line of output:
- View the app by clicking the Web preview button > Preview on port 8080:
Your page should resemble the following:
In your terminal window, press
Ctrl+C to stop the development server.
Deploy your app
Now you'll create an application on an App Engine with the following command:
When prompted, enter your choice of region. You should receive the following output soon after:
pom.xmlfile with the following command:
Key down towards the bottom of the page until you find this section:
myProjectIdto your Qwiklabs Project ID. Ensure this section resembles the following before moving on:
Now exit nano and save the file with CTRL + X --> Y --> Enter.
DO NOT use the
gcloud app deploycommand as stated in the output to deploy your app. Instead, run the following command to deploy your application:
You should receive the following output:
View your application
To launch your browser, enter the following command then click on the link it provides.
Example output; your link will be different:
Your application is deployed and you can read the short message in your browser:
Click Check my progress to verify the objective.
Test your knowledge
Test your knowledge about Google cloud Platform by taking our quiz. (Please select multiple correct options if necessary.)
Finish Your Quest
Continue your Quest with Baseline: Deploy & Develop. 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 this 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
- Lean more about an App Engine with An Overview Of App Engine
- Try something else with an App Engine with Getting Started with Flask on App Engine Standard Environment
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Manual Last Updated June 05, 2020
Lab Last Tested June 05, 2020
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