This cloudformation stack launches the following resources:
- An instance with webserver configured
- An Application Load Balancer
- An Alarm for Application Load Balancer to monitor and ensure the service is always up and running.
To launch the stack, you must have aws cli configured.
The parameters that need to be configured for the stack are configured in the parameters.json file. Two Public subnets are needed for the Application Load balancer and one private subnet needs to be specified for the webserver instance. You will also need a keypair specified as a parameter to be able to ssh into your webserver if needed. Configure accordingly.
Then, run the following command :
aws cloudformation create-stack --stack-name webserver --template-body file://webserver.yaml --parameters file://parameters.json
To get the output of the cloudformation stack which contains the DNS name for the application loadbalancer, run the following command:
aws cloudformation describe-stacks --stack-name webserver
Then go to the loadbalancer's DNS name in a browser and voila!