Task 2. Set up an HTTP load balancer

I used those command line but the backend service still unhealthy 

cat << EOF > startup.sh
#! /bin/bash
apt-get update
apt-get install -y nginx
service nginx start
sed -i — ‘s/nginx/Google Cloud Platform – ‘”\$HOSTNAME”‘/’ /var/www/html/index.nginx-debian.html
EOF

gcloud compute instance-templates create nucleus-webserver-template \
–machine-type=e2-medium \
–metadata=startup-script=”#! /bin/bash
apt-get update
apt-get install -y nginx
service nginx start
sed -i — “s/nginx/Google Cloud Platform – $HOSTNAME/” /var/www/html/index.nginx-debian.html” \
–image-family=debian-11 \
–image-project=debian-cloud \
–tags=http-server

gcloud compute instance-groups managed create nucleus-webserver-group \
–base-instance-name=nucleus-webserver \
–template=nucleus-webserver-template \
–size=2 \
–zone=us-central1-b

gcloud compute firewall-rules create accept-tcp-rule-261 \
–allow=tcp:80 \
–target-tags=http-server \
–description=”Allow port 80 traffic”

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

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

gcloud compute backend-services add-backend nucleus-backend-service \
–instance-group=nucleus-webserver-group \
–instance-group-zone=us-central1-b \
–global

gcloud compute url-maps create nucleus-url-map \
–default-service=nucleus-backend-service

gcloud compute target-http-proxies create nucleus-http-proxy \
–url-map=nucleus-url-map

gcloud compute forwarding-rules create http-content-rule \
–global \
–target-http-proxy=nucleus-http-proxy \
–ports=80

gcloud compute forwarding-rules list –global

but I didn’t get the score and get this message 

Please create the managed instance group with 2 nginx web-server.