GSP646

Overview

In this lab, you use Cloud Run functions and Cloud Scheduler to identify and clean up wasted cloud resources. On Google Cloud, static IP addresses are a free resource when they’re attached to a load balancer or virtual machine (VM) instance. When a static IP address is reserved, but not used, it accumulates a hourly charge. In apps that heavily depend on static IP addresses and large-scale dynamic provisioning, this waste can become significant over time.

What you'll do

• Create a Compute Engine VM with a static external IP address and a separate unused static external IP address
• Deploy a Cloud Run function to identify unused addresses
• Create a Cloud Scheduler job to schedule the function to run by using an HTTP trigger

Architecture

The following diagram describes the architecture used in the first section of this lab, where you schedule a Cloud Run function to identify and clean up unused IP addresses.

Setup and requirements

In this section, you configure the infrastructure and identities required to complete the lab.

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 are made available to you.

This hands-on lab lets you do the lab activities in a real cloud environment, not in a simulation or demo environment. It does so by giving you new, temporary credentials 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

1. Click the Start Lab button. If you need to pay for the lab, a dialog opens for you to select your payment method. On the left is the Lab Details pane with the following:

   • The Open Google Cloud console button
   • Time remaining
   • The temporary credentials that you must use for this lab
   • Other information, if needed, to step through this lab

2. Click Open Google Cloud console (or right-click and select Open Link in Incognito Window if you are running the Chrome browser).

   The lab spins up resources, and then opens another tab that shows the Sign in page.

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

   Note: If you see the Choose an account dialog, click Use Another Account.

3. If necessary, copy the Username below and paste it into the Sign in dialog.

   {{{user_0.username | "Username"}}}

   You can also find the Username in the Lab Details pane.

4. Click Next.

5. Copy the Password below and paste it into the Welcome dialog.

   {{{user_0.password | "Password"}}}

   You can also find the Password in the Lab Details pane.

6. Click Next.

   Important: You must use the credentials the lab provides you. Do not use your Google Cloud account credentials. Note: Using your own Google Cloud account for this lab may incur extra charges.

7. 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 Google Cloud console opens in this tab.

Note: To access Google Cloud products and services, click the Navigation menu or type the service or product name in the Search field.

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.

1. Click Activate Cloud Shell at the top of the Google Cloud console.

2. Click through the following windows:

   • Continue through the Cloud Shell information window.
   • Authorize Cloud Shell to use your credentials to make Google Cloud API calls.

When you are connected, you are already authenticated, and the project is set to your Project_ID, . The output contains a line that declares the Project_ID for this session:

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

3. (Optional) You can list the active account name with this command:

4. Click Authorize.

Output:

5. (Optional) You can list the project ID with this command:

Output:

Task 1. Enable APIs and clone repository

1. In Cloud Shell, enable the Cloud Scheduler API:

   gcloud services enable cloudscheduler.googleapis.com Note: It takes for a while to enable the Cloud Scheduler API.

Click Check my progress to verify the objective.

2. Clone the repository:

   git clone https://github.com/GoogleCloudPlatform/gcf-automated-resource-cleanup.git && cd gcf-automated-resource-cleanup/

3. Set environment variables and make the repository folder your $WORKDIR where you run all commands related to this lab:

   export PROJECT_ID=$(gcloud config list --format 'value(core.project)' 2>/dev/null) export region={{{project_0.default_region | Region}}} WORKDIR=$(pwd)

Task 2. Create IP addresses

1. In Cloud Shell, navigate to the unused-ip directory:

   cd $WORKDIR/unused-ip

2. Export the names of the IP addresses as variables:

   export USED_IP=used-ip-address export UNUSED_IP=unused-ip-address

3. Create two static IP addresses:

   gcloud compute addresses create $USED_IP --project=$PROJECT_ID --region={{{project_0.default_region | Region}}} gcloud compute addresses create $UNUSED_IP --project=$PROJECT_ID --region={{{project_0.default_region | Region}}}

   This lab uses the region, but you can choose a different region and refer to it consistently throughout the rest of the lab.

4. Confirm that two addresses were created:

   gcloud compute addresses list --filter="region:({{{project_0.default_region | Region}}})"

   In the output, a status of RESERVED means that the IP addresses aren’t in use:

   NAME ADDRESS/RANGE TYPE PURPOSE NETWORK REGION SUBNET STATUS unused-ip-address 35.232.144.85 EXTERNAL {{{project_0.default_region | Region}}} RESERVED used-ip-address 104.197.56.87 EXTERNAL {{{project_0.default_region | Region}}} RESERVED

Click Check my progress to verify the objective.

5. Set the used IP address as an environment variable:

   export USED_IP_ADDRESS=$(gcloud compute addresses describe $USED_IP --region={{{project_0.default_region | Region}}} --format=json | jq -r '.address')

Task 3. Create a VM

1. In Cloud Shell, create an instance:

   gcloud compute instances create static-ip-instance \ --zone={{{project_0.default_zone | Zone}}} \ --machine-type=e2-medium \ --subnet=default \ --address=$USED_IP_ADDRESS

Click Check my progress to verify the objective.

2. Confirm that one of the IP addresses is now in use:

   gcloud compute addresses list --filter="region:({{{project_0.default_region | Region}}})"

   The output is similar to the following:

   NAME ADDRESS/RANGE TYPE PURPOSE NETWORK REGION SUBNET STATUS unused-ip-address 35.232.144.85 EXTERNAL {{{project_0.default_region | Region}}} RESERVED used-ip-address 104.197.56.87 EXTERNAL {{{project_0.default_region | Region}}} IN_USE

Task 4. Review the Cloud Run function code

• In Cloud Shell, output the main section of the code:

  cat $WORKDIR/unused-ip/function.js | grep "const compute" -A 31

The output is as follows:

In the preceding code sample, the following is important:

• compute.getAddresses(function(err, addresses) uses the getAddresses method to retrieve IP addresses across all regions in the project.

• item.getMetadata(function(err, metadata, apiResponse) gets the metadata for each IP address and checks its STATUS field.

• if ((metadata.status=='RESERVED') & (calculateAge(metadata.creationTimestamp) >= ageToDelete)){ checks whether the IP address is in use, calculates its age by using a helper function, and compares its age against a constant (set to 0 for the purposes of the lab).

• item.delete(function(err, operation, apiResponse2){ deletes the IP address.

Task 5. Deploy the Cloud Run function

1. Disable the Cloud Functions API:

   gcloud services disable cloudfunctions.googleapis.com

2. Re-enable the Cloud Functions API:

   gcloud services enable cloudfunctions.googleapis.com

3. Add the artifactregistry.reader permission for your appspot service account. Replace [PROJECT_ID] with your qwiklabs Project ID.

   gcloud projects add-iam-policy-binding [PROJECT_ID] \ --member="serviceAccount:[PROJECT_ID]@appspot.gserviceaccount.com" \ --role="roles/artifactregistry.reader"

4. In Cloud Shell, deploy the Cloud Run function:

   gcloud functions deploy unused_ip_function --gen2 --trigger-http --runtime=nodejs20 --region={{{project_0.default_region | Region}}}
   • If prompted, enter Y to allow unauthenticated invocations.
   Note: Deploying a cloud run function can take 2-5 minutes, depending on region.

Click Check my progress to verify the objective.

6. Set the trigger URL as an environment variable:

   export FUNCTION_URL=$(gcloud functions describe unused_ip_function --region={{{project_0.default_region | Region}}} --format=json | jq -r '.url')

Task 6. Schedule and test the Cloud Run function

1. In Cloud Shell, create an App Engine app to use Cloud Scheduler:

   gcloud app create --region {{{project_0.startup_script.app_region | REGION}}}

2. In Cloud Shell, create a Cloud Scheduler task to run the Cloud Run function at 2 AM every night:

   gcloud scheduler jobs create http unused-ip-job \ --schedule="* 2 * * *" \ --uri=$FUNCTION_URL \ --location={{{project_0.default_region | Region}}}

Click Check my progress to verify the objective.

3. Test the job by manually triggering it:

   gcloud scheduler jobs run unused-ip-job \ --location={{{project_0.default_region | Region}}}

You should receive no output.

Click Check my progress to verify the objective.

4. Confirm that the unused IP address was deleted:

   gcloud compute addresses list --filter="region:({{{project_0.default_region | Region}}})"

The output is similar to the following:

Click Check my progress to verify the objective.

Congratulations!

In this lab, you completed the following tasks:

• Created a Compute Engine VM with a static external IP address and a separate unused static external IP address
• Deployed a Cloud Run function to identify unused addresses
• Created a Cloud Scheduler job to schedule the function to run by using an HTTP trigger

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Manual Last Updated January 15, 2025

Lab Last Tested January 15, 2025

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