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Cover image for Part-70: Implement a Global External Network Load balancer with TCP Proxy in GCP Cloud
Latchu@DevOps
Latchu@DevOps

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Part-70: Implement a Global External Network Load balancer with TCP Proxy in GCP Cloud

#googlecloud #devops #cloud #learning

Cloud Load Balancing - Network Load Balancer (TCP/TLS)

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Step-01: Introduction

  • Pre-requisite-1: Create Instance Templates, Create Managed Instance Groups as part of below demo 
https://dev.to/latchudevops/part-67-mastering-google-cloud-global-load-balancers-regional-mig-global-http-demo-n98
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  • Create Global External Load NetworkBalancer - TCP Proxy

Step-02: Create Health check - TCP

# Create a health check - TCP gcloud compute health-checks create tcp global-tcp-health-check --port 80
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Step-03: Create Global External Network Load Balancer

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  • Go to Network Services -> Load Balancing -> CREATE LOAD BALANCER
  • Network Load Balancer (TCP/SSL): START CONFIGURATION
  • Internet facing or internal only: From Internet to my VMs
  • Multiple regions or single region: Multiple regions (or not sure yet)
  • Classic or advanced traffic management: Advanced traffic management
  • Load Balancer name: global-lb-external-tcp

Backend Configuration

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  • CLick on CREATE A BACKEND SERVICE
  • Name: global-lb-external-tcp
  • Description: global-lb-external-tcp
  • Backend type: Instance Group
  • Protocol: TCP
  • Named Port: webserver80 (AUTO-POPULATED WHEN BACKEND IS SELECTED AS mig1-lbdemo)
  • Timeout: 30
  • IP address selection policy: Only IPv4
  • BACKENDS 
IP stack type: IPv4 (single stack) Instance Group: mig1-us-central1 Port Numbers: 80 REST ALL LEAVE TO DEFAULTS Click on DONE Instance Group: mig1-us-east1 Port Numbers: 80 REST ALL LEAVE TO DEFAULTS Click on DONE
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  • Health Check: global-tcp-health-check

Frontend Configuration

  • Click on ADD FRONTEND IP AND PORT
  • Name: frontend-tcp
  • Description: frontend-tcp
  • Protocol: TCP
  • Network Service Tier: Premium (Current project-level tier, change)
  • IP Version: IPv4
  • IP Address: global-lb-ip5 CREATE NEW EXTERNAL STATCI IP
  • Port: 80
  • Proxy protocol: OFF

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Review and Finalize

  • Review all settings
  • Click on CREATE

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Step-03: Verify Load Balancer

  • Go to Network Services -> Load Balancing -> global-lb-external-tcp
  • Review the Tabs 
LOAD BALANCERS BACKENDS FRONTENDS
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Step-04: Access Application using LB IP on browser

  • Important Note: WAIT FOR 3 to 5 Minutes before Load Balancer is fully operational

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Step-05: Test multi-region functionality (Send traffic to region closest to client)

To simulate a user in a different geography, you can connect to one of your virtual machine instances in a different region, and then run a curl command from that instance to see the request go to an instance in the region closest to it.

# Set Project gcloud config set project PROJECT_ID gcloud config set project gcpdemos # Region: us-central1 gcloud compute ssh --zone "us-central1-c" "mig1-us-central1-xq12" curl http://LB-IP curl http://34.36.49.82/ # Region: us-east1 gcloud compute ssh --zone "us-east1-d" "mig2-us-east1-693l" curl http://LB-IP curl http://34.36.49.82/
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Step-06: Delete Load Balancer

  • Delete the Load balancer created as part of this demo.

🌟 Thanks for reading! If this post added value, a like ❤️, follow, or share would encourage me to keep creating more content.

— Latchu | Senior DevOps & Cloud Engineer

☁️ AWS | GCP | ☸️ Kubernetes | 🔐 Security | ⚡ Automation
📌 Sharing hands-on guides, best practices & real-world cloud solutions

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