Cara Set Up Network Dan HTTP Load Balancers Di GCP

“Cara Set Up Network dan HTTP Load Balancers di GCP”

Daftar Isi

Pengantar

Load Balancing Jaringan TCP/UDP eksternal Google Cloud (setelah ini disebut sebagai Network Load Balancing) adalah penyeimbang beban pass-through regional. Penyeimbang beban jaringan mendistribusikan lalu lintas eksternal di antara instans mesin virtual (VM) di wilayah yang sama.

Aktifkan Cloud Shell

Buka dashboaard GCP
Pilih Cloud shell

Setting default region dan zone untuk semua resources

Setting default zone

gcloud config set compute/zone us-central1-a

setting default Region

gcloud config set compute/region us-central1

Membuat multiple web server instances

Buat webserver 1

gcloud compute instances create www1 \
  --image-family debian-9 \
  --image-project debian-cloud \
  --zone us-central1-a \
  --tags network-lb-tag \
  --metadata startup-script="#! /bin/bash
    sudo apt-get update
    sudo apt-get install apache2 -y
    sudo service apache2 restart
    echo '<!doctype html><html><body><h1>www1</h1></body></html>' | tee /var/www/html/index.html"

Buat Webserver 2

gcloud compute instances create www2 \
  --image-family debian-9 \
  --image-project debian-cloud \
  --zone us-central1-a \
  --tags network-lb-tag \
  --metadata startup-script="#! /bin/bash
    sudo apt-get update
    sudo apt-get install apache2 -y
    sudo service apache2 restart
    echo '<!doctype html><html><body><h1>www2</h1></body></html>' | tee /var/www/html/index.html"

Buat Webserver 3

gcloud compute instances create www3 \
  --image-family debian-9 \
  --image-project debian-cloud \
  --zone us-central1-a \
  --tags network-lb-tag \
  --metadata startup-script="#! /bin/bash
    sudo apt-get update
    sudo apt-get install apache2 -y
    sudo service apache2 restart
    echo '<!doctype html><html><body><h1>www3</h1></body></html>' | tee /var/www/html/index.html"

Buat firewall rule untuk allow external traffic menuju VM instances

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

Cek List Compute

gcloud compute instances list

Test Curl

curl http://[IP_ADDRESS]

Konfigurasi load balancing service

Buat static external IP untuk loadbalancer

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

Buat HTTP Health Check

gcloud compute http-health-checks create basic-check

Buat Target pool untuk di hubungkan dengan health check

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

Tambahkan instance pada pool

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

Buat forwading Rule

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

Mengirim traffict pada Instance

Cek list external IP dan forwading

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

Ganti IP_ADDRESS dengan yang ada di list IP external

while true; do curl -m1 IP_ADDRESS; done

Membuat HTTP load balancer

Buat Load Balancer Template

gcloud compute instance-templates create lb-backend-template \
   --region=us-central1 \
   --network=default \
   --subnet=default \
   --tags=allow-health-check \
   --image-family=debian-9 \
   --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'

Buat Instance Group

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

Buat fw-allow-health-check firewall rule

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

Set Up Global static External IP

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

Cek IP yang di dapatkan ( Noted )

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

Buat health check untuk load balancer

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

Buat backend Service

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

Hubungkan instance group dengan backend service

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

Buat URL map untuk routing incoming request

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

Buat target http proxy untuk menghubungkan requset ke url map

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

Buat global forwading rule untuk menghubungkan incoming request ke proxy

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

Testing traffic sent pada instances

Masuk ke menu Navigation menu, go to Network services > Load balancing.
Buka web-map-http yang sudah di buat
Pada Backend section , cek sampai semua Vm healthy
Jika VM semua sudah Healty , test akses dari browser