Create an instance VM and expand it to Kubernetes to host 2 VM instances and then add HTTP Load Balancer.

Getting Started with cloud :Challenge Lab

Task 1: Create a project jumphost instance
We will use this instance to perform maintenance for the project.

Make sure you:
1.name the instance nucleus-jumphost
2.use the machine type of f1-micro
3.use the default image type (Debian Linux)

$gcloud compute instances create nucleus-jumphost --machine-type f1-micro --zone us-east1-b
_________________________________________________________________________________________________
Before going on task 2 set the default zone to avoid writing --zone flag in every command-

$gcloud config set compute/zone us-east1-b
__________________________________________________________________________________________________
Task 2: Create a Kubernetes service cluster
1.Create a cluster (in the us-east1-b zone) to host the service.

$gcloud container clusters create nucleus-jumphost-webserver
______________________________________________________________________
Before proceeding get credentials for the cluster

$gcloud container clusters get-credentials nucleus-jumphost-webserver
_______________________________________________________________________
2.Use the Docker container hello-app (`gcr.io/google-samples/hello-app:2.0`) as a place holder, 
  the team will replace the container with their own work later.

$kubectl create deployment hello-server --image=gcr.io/google-samples/hello-app:1.0
_______________________________________________________________________
3.Expose the app on port 8080

$kubectl expose deployment hello-server --type=LoadBalancer --port 8080

$kubectl get service  // to check your service is working or not 

----------------------------------------------------------------------------------------------------------------------------------
Task3


________________________________________________________________
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

__________________________________________________________________
1.Create an instance template

gcloud compute instance-templates create nginx-template \
         --metadata-from-file startup-script=startup.sh
___________________________________________________________________         
2.Create a target pool

gcloud compute target-pools create nginx-pool
____________________________________________________________________
3.Create a managed instance group
gcloud compute instance-groups managed create nginx-group \
         --base-instance-name nginx \
         --size 2 \
         --template nginx-template \
         --target-pool nginx-pool
_____________________________________________________________________         
List the compute engine instances and you should see all of the instances created:
gcloud compute instances list
4.Create a firewall rule to allow traffic (80/tcp)
gcloud compute firewall-rules create www-firewall --allow tcp:80
______________________________________________________________________
5.Create a health check
gcloud compute http-health-checks create http-basic-check
______________________________________________________________________
6.Create a backend service and attach the manged instance group
gcloud compute instance-groups managed \
       set-named-ports nginx-group \
       --named-ports http:80
gcloud compute backend-services create nginx-backend \
      --protocol HTTP --http-health-checks http-basic-check --global
gcloud compute backend-services add-backend nginx-backend \
    --instance-group nginx-group \
    --instance-group-zone us-east1-b \
    --global
______________________________________________________________
7.Create a URL map and target HTTP proxy to route requests to your URL map
gcloud compute url-maps create web-map \
    --default-service nginx-backend
gcloud compute target-http-proxies create http-lb-proxy \
    --url-map web-map
______________________________________________________________________
8.Create a forwarding rule
gcloud compute forwarding-rules create http-content-rule \
        --global \
        --target-http-proxy http-lb-proxy \
        --ports 80
gcloud compute forwarding-rules list