Google Cloud - Global Application Load Balancer HTTP¶

Step-01: Introduction¶

Pre-requisite-1: Create Instance Templates, Create Managed Instance Groups as part of Section Cloud-LoadBalancer/01-Managed-Instance-Groups
Create Global Application Load Balancer - HTTP

Step-02: Create Global HTTP Load Balancer¶

Application Load Balancer (HTTP/S)¶

Go to Network Services -> Load Balancing -> CREATE LOAD BALANCER
Select Application Load Balancer (HTTP/S): START CONFIGURATION
Internet facing or internal only: From Internet to my VMs or serverless services
Global or Regional: Global external Application Load Balancer
Click on CONTINUE
Load Balancer name: global-lb-external-http

Frontend Configuration¶

Click on ADD FRONTEND IP AND PORT
Name: frontend-http
Description: frontend-http
Protocol: HTTP
IP Version: IPv4
IP Address: global-lb-ip1 CREATE NEW EXTERNAL STATCI IP
Port: 80
Click on DONE

Backend Configuration¶

CLick on CREATE A BACKEND SERVICE
Name: mybackend-svc1
Description: mybackend-svc1
Backend type: Instance Group
Protocol: HTTP
Named Port: webserver80 (AUTO-POPULATED WHEN BACKEND IS SELECTED AS mig1-lbdemo)
Timeout: 30
BACKENDS
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
Disable Cloud CDN
Health Check: http-health-check
Security:
Cloud Armor backend security policy: NONE
Click on CREATE

Routing Rules¶

Mode: Simple host and path rule
REST ALL LEAVE TO DEFAULTS

Review and Finalize¶

Review all settings
Click on CREATE

Step-03: Verify Load Balancer¶

Go to Network Services -> Load Balancing -> global-lb-external-http
Review the Tabs
LOAD BALANCERS
BACKENDS
FRONTENDS

Step-04: Access Application using LB IP on browser¶

Important Note: WAIT FOR 3 to 5 Minutes before Load Balancer is fully operational
```
# Access Application
http://LB-IP
```

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 gcplearn9

# Region: us-central1
gcloud compute ssh --zone "us-central1-c" "mig1-us-central1-xq12" 
curl http://LB-IP
curl http://34.49.252.214/

# Region: us-east1
gcloud compute ssh --zone "us-east1-d" "mig2-us-east1-693l" 
curl http://LB-IP
curl http://34.49.252.214/

Step-06: Delete Load Balancer¶

Delete the Load balancer created as part of this demo.