GSP007.md

GSP007 - Set Up Network and HTTP Load Balancers

Task 1. Set the default region and zone for all resources

1. Set default region

   gcloud config set compute/zone us-central1-f

2. Set default zone

   gcloud config set compute/region us-central1

Task 2. Create multiple web server instances

1. Create VM www1

     gcloud compute instances create www1 \
       --zone=us-central1-f \
       --tags=network-lb-tag \
       --machine-type=e2-small \
       --image-family=debian-11 \
       --image-project=debian-cloud \
       --metadata=startup-script='#!/bin/bash
       apt-get update
       apt-get install apache2 -y
       service apache2 restart
       echo "
   <h3>Web Server: www1</h3>" | tee /var/www/html/index.html'

2. Create VM www2

     gcloud compute instances create www2 \
       --zone=us-central1-f \
       --tags=network-lb-tag \
       --machine-type=e2-small \
       --image-family=debian-11 \
       --image-project=debian-cloud \
       --metadata=startup-script='#!/bin/bash
       apt-get update
       apt-get install apache2 -y
       service apache2 restart
       echo "
   <h3>Web Server: www2</h3>" | tee /var/www/html/index.html'

3. Create VM www3

     gcloud compute instances create www3 \
       --zone=us-central1-f \
       --tags=network-lb-tag \
       --machine-type=e2-small \
       --image-family=debian-11 \
       --image-project=debian-cloud \
       --metadata=startup-script='#!/bin/bash
       apt-get update
       apt-get install apache2 -y
       service apache2 restart
       echo "
   <h3>Web Server: www3</h3>" | tee /var/www/html/index.html'

4. firewall rule

   gcloud compute firewall-rules create www-firewall-network-lb \
       --target-tags network-lb-tag --allow tcp:80

5. Dapetin ip address

   gcloud compute instances list

6. Cek apakah web server udah jalan

   curl http://[EXTERNAL_IP]

Task 3. Configure the load balancing service

1. buat static ip untuk load balancer

   gcloud compute addresses create network-lb-ip-1 \
       --region us-central1

2. buat health check

   gcloud compute http-health-checks create basic-check

3. add target pool

    gcloud compute target-pools create www-pool \
        --region us-central1 --http-health-check basic-check

4. add instances to pool

   gcloud compute target-pools add-instances www-pool \
       --instances www1,www2,www3

5. add forwarding rule

   gcloud compute forwarding-rules create www-rule \
       --region  us-central1 \
       --ports 80 \
       --address network-lb-ip-1 \
       --target-pool www-pool

Task 4. Sending traffic to your instances

1. cek ip address forwarding rule

   gcloud compute forwarding-rules describe www-rule --region us-central1

2. simpan ke variable

   IPADDRESS=$(gcloud compute forwarding-rules describe www-rule --region us-central1 --format="json" | jq -r .IPAddress)

3. request ke ip address

   while true; do curl -m1 $IPADDRESS; done

Task 5. Create an HTTP load balancer

1. Buat load balancer template

   gcloud compute instance-templates create lb-backend-template \
       --region=us-central1 \
       --network=default \
       --subnet=default \
       --tags=allow-health-check \
       --machine-type=e2-medium \
       --image-family=debian-11 \
       --image-project=debian-cloud \
       --metadata=startup-script='#!/bin/bash
           apt-get update
           apt-get install apache2 -y
           a2ensite default-ssl
           a2enmod ssl
           vm_hostname="$(curl -H "Metadata-Flavor:Google" \
           http://169.254.169.254/computeMetadata/v1/instance/name)"
           echo "Page served from: $vm_hostname" | \
           tee /var/www/html/index.html
           systemctl restart apache2'

2. Buat instance group

   gcloud compute instance-groups managed create lb-backend-group \
       --template=lb-backend-template --size=2 --zone=us-central1-f

3. Buat health check

   gcloud compute firewall-rules create fw-allow-health-check \
       --network=default \
       --action=allow \
       --direction=ingress \
       --source-ranges=130.211.0.0/22,35.191.0.0/16 \
       --target-tags=allow-health-check \
       --rules=tcp:80

4. Set global static ip address

   gcloud compute addresses create lb-ipv4-1 \
       --ip-version=IPV4 \
       --global

   gcloud compute addresses describe lb-ipv4-1 \
       --format="get(address)" \
       --global

5. Buat health check

       gcloud compute health-checks create http http-basic-check \
       --port 80

6. Buat backend service

   gcloud compute backend-services create web-backend-service \
       --protocol=HTTP \
       --port-name=http \
       --health-checks=http-basic-check \
       --global

7. Add instance group to backend service

   gcloud compute backend-services add-backend web-backend-service \
       --instance-group=lb-backend-group \
       --instance-group-zone=us-central1-f \
       --global

8. Buat url map

   gcloud compute url-maps create web-map-http \
       --default-service web-backend-service

9. Buat target http proxy

   gcloud compute target-http-proxies create http-lb-proxy \
       --url-map web-map-http

10. Buat global forwarding rule

    gcloud compute forwarding-rules create http-content-rule \
        --address=lb-ipv4-1\
        --global \
        --target-http-proxy=http-lb-proxy \
        --ports=80

Task 6. Testing traffic sent to your instances

1. Navigation > Network services > Load balancing