Ramesh RajagopalFollowSystem Weakness--ListenShareAWS API Gateway with VPC Link and Network Load Balancer is a powerful combination that allows you to securely expose your API to clients within your Virtual Private Cloud (VPC). However, setting up and debugging this configuration can sometimes be a challenging task. In this tutorial, we will walk through the steps to debug AWS API Gateway with VPC Link and Network Load Balancer to ensure the smooth operation of your API.Before we begin, make sure you have the following prerequisites in place:1. An active AWS account with appropriate permissions to create and manage API Gateway, VPC, and Network Load Balancer resources.2. Basic knowledge of AWS API Gateway, VPC, and Network Load Balancer concepts.3. An existing API deployed in API Gateway that you want to expose via VPC Link and Network Load Balancer.1. Navigate to the AWS Management Console and open the API Gateway service.2. Create a new VPC Link by selecting “VPC Links” in the left navigation pane and then clicking “Create VPC Link.”3. Choose the target VPC for your API Gateway to use. Ensure that the VPC and API Gateway resources are in the same region.4. Define the security group rules for the VPC Link. Make sure the security group allows inbound and outbound traffic required for your API.5. Create the VPC Link, and note down its ID, as we will need it later.1. Open the EC2 service from the AWS Management Console.2. Select “Load Balancers” from the left navigation pane and click on “Create Load Balancer.”3. Choose “Network Load Balancer” as the load balancer type.4. Configure the load balancer with the desired settings. Ensure that you select the appropriate VPC and availability zones where your API Gateway resides.5. In the “Configure Routing” section, create a new target group for your API Gateway. Set the protocol to “HTTP” and the port to “80” or the port on which your API is running.6. Register the instances (targets) for your API Gateway with the target group. In this case, the targets will be the VPC Link we created in Step 1.7. Complete the remaining steps to create the Network Load Balancer.## Step 3: Debugging API Gateway with VPC Link and Network Load BalancerNow that you have set up the necessary components, it’s time to debug and test your API Gateway with VPC Link and Network Load Balancer.1. Check VPC Link status: — Go to the API Gateway service, navigate to “VPC Links,” and ensure that the VPC Link’s status is “Available.” If it’s not, review the VPC Link settings and ensure the associated VPC’s security group rules are correctly configured.2. Verify Network Load Balancer configuration: — Open the EC2 service, go to “Load Balancers,” and verify that your Network Load Balancer’s status is “Active.” If it’s not, review the configuration steps and make necessary corrections.3. Check Target Group health: — Within the EC2 service, go to “Target Groups,” select your API Gateway target group, and verify that the registered targets (VPC Link) are showing as “Healthy.” If they are not, review the target group settings and ensure that the VPC Link is correctly registered.4. Enable VPC flow logs: — To gain visibility into network traffic, consider enabling VPC flow logs for the VPC in which your API Gateway and VPC Link reside. Flow logs can help you identify any unusual traffic patterns or errors.5. Test the API endpoint: — Send requests to your API Gateway’s endpoint using various methods and verify if the responses are as expected. Use different client tools like `curl`, Postman, or your application to perform these tests.6. Check API Gateway logs: — Review the API Gateway logs to identify any errors or latency issues. These logs can be found in Amazon CloudWatch.7. Inspect Network Load Balancer logs: — Enable access logs for your Network Load Balancer to monitor incoming requests, responses, and potential errors.8. Review security group rules: — Double-check the security group rules for both the VPC Link and API Gateway to ensure they allow the necessary inbound and outbound traffic.9. Examine VPC route tables and NACLs: — Check the VPC’s route tables and network access control lists (NACLs) to ensure there are no conflicting rules that could be blocking traffic.By following the steps and debugging guidelines outlined in this tutorial, you can effectively debug AWS API Gateway with VPC Link and Network Load Balancer configurations. This combination offers a secure and scalable way to expose your API to clients within your VPC. Regularly monitoring and debugging your setup will help ensure a smooth and reliable API experience for your users.----System WeaknessEco-friendly human.Ramesh Rajagopal--Mr JokarinSystem Weakness--3Diego TellaroliinSystem Weakness--15Cybertech MaveninSystem Weakness--8Thilina Ashen GamageinPlatform Engineer--2Somnath MusibinLevel Up Coding--Ahmed Salem--Hafiz PatwaryinSystem Weakness--Cody Waits--Deniz YilmazinAWS Tip--HelpStatusWritersBlogCareersPrivacyTermsAboutText to speechTeams