Load Balancers 실습(부하분산기)

# 1. Set the default region and zone for all resources ``` gcloud config set compute/zone us-central1-a gcloud config set compute/region us-central1 ``` # 2. Create multiple web server instances ## 1. ```bash gcloud compute instances create www \ --image-family debian-9 \ --image-project debian-cloud \ --zone us-central1-a \ --tags network-lb-tag ``` ## 2 > sss ```bash gcloud compute instances create www2 \ --image-family debian-9 \ --image-project debian-cloud \ --zone us-central1-a \ --tags network-lb-tag \ --metadata startup-script= ``` ## 3 ```bash gcloud compute instances create www3 \ --image-family debian-9 \ --image-project debian-cloud \ --zone us-central1-a \ --tags network-lb-tag \ --metadata startup-script= ``` ## Create a firewall rule to allow external traffic to the VM instances: ``` gcloud compute firewall-rules create www-firewall-network-lb \ --target-tags network-lb-tag --allow tcp:80 ``` ``` gcloud compute instances list ``` ``` NAME: www1 ZONE: us-central1-a MACHINE_TYPE: n1-standard-1 PREEMPTIBLE: INTERNAL_IP: 10.128.0.2 EXTERNAL_IP: STATUS: RUNNING NAME: www2 ZONE: us-central1-a MACHINE_TYPE: n1-standard-1 PREEMPTIBLE: INTERNAL_IP: 10.128.0.3 EXTERNAL_IP: STATUS: RUNNING NAME: www3 ZONE: us-central1-a MACHINE_TYPE: n1-standard-1 PREEMPTIBLE: INTERNAL_IP: 10.128.0.4 EXTERNAL_IP: ``` # 3: Configure the load balancing service ## 1. Create a static external IP address for your load balancer: ``` gcloud compute addresses create network-lb-ip-1 \ --region us-central1 ``` (Output) ``` Created [https://www.googleapis.com/compute/v1/projects/xxxxx5/regions/us-central1/addresses/network-lb-ip-1]. ``` ## Add a legacy HTTP health check resource: ``` gcloud compute http-health-checks create basic-check ``` ### Add a target pool in the same region as your instances. Run the following to create the target pool and use the health check, which is required for the service to function: ``` gcloud compute target-pools add-instances www-pool \ --instances www1,www2,www3 ``` ### 방화벽 추가 ``` gcloud compute forwarding-rules create www-rule \ --region us-central1 \ --ports 80 \ --address network-lb-ip-1 \ --target-pool www-pool ``` # 4: Sending traffic to your instances ``` gcloud compute forwarding-rules describe www-rule --region us-central1 ``` (OutPut) ``` IPAddress: IPProtocol: TCP creationTimestamp: '2022-02-03T20:21:03.427-08:00' description: '' fingerprint: AiheMBl5-KE= id: '634970601065355072' kind: compute#forwardingRule labelFingerprint: 42WmSpB8rSM= loadBalancingScheme: EXTERNAL name: www-rule networkTier: PREMIUM portRange: 80-80 region: https://www.googleapis.com/compute/v1/projects/xxxxxx/regions/us-central1 selfLink: https://www.googleapis.com/compute/v1/projects/xxxxx/regions/us-central1/forwardingRules/www-rule target: https://www.googleapis.com/compute/v1/projects/xxxxx5/regions/us-central1/targetPools/www-pool ``` # gp ``` while true; do curl -m1 IP_ADDRESS; done ``` # 5: Create an HTTP load balancer ## 5.1 First, create the 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= ``` ## 5.2 Create a managed instance group based on the template: ``` gcloud compute instance-groups managed create lb-backend-group \ --template=lb-backend-template --size=2 --zone=us-central1-a ``` ## 5.3 Create the 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 ``` ## 5.4 set up a global static external IP ``` gcloud compute addresses create lb-ipv4-1 \ --ip-version=IPV4 \ --global ``` ``` gcloud compute addresses describe lb-ipv4-1 \ --format="get(address)" \ --global ``` ## 5.5 Create a health check for the load balancer: ``` gcloud compute health-checks create http http-basic-check \ --port 80 ``` ## 5.6 Create a backend service ``` gcloud compute backend-services create web-backend-service \ --protocol=HTTP \ --port-name=http \ --health-checks=http-basic-check \ --global ``` ## 5.7 Add your instance group as the backend to the backend service: ``` gcloud compute backend-services add-backend web-backend-service \ --instance-group=lb-backend-group \ --instance-group-zone=us-central1-a \ --global ``` ## 5.8 Create a URL map to route the incoming requests to the default backend service ``` gcloud compute url-maps create web-map-http \ --default-service web-backend-service ``` ## 5.9 Create a target HTTP proxy to route requests to your URL map: ``` gcloud compute target-http-proxies create http-lb-proxy \ --url-map web-map-http ``` ## 5.10 Create a global forwarding rule to route incoming requests to the proxy: ``` gcloud compute forwarding-rules create http-content-rule \ --address=lb-ipv4-1\ --global \ --target-http-proxy=http-lb-proxy \ --ports=80 ```