Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. In this lab, we configure a web server to corporate standards, noting how much effort it can take to walk through these steps manually each time. We then learn how to bootstrap an instance using a user data script, allowing us to automatically build servers. By the end of this lab, the user will understand what an EC2 bootstrap script is and how to use one to automate one of the most tedious parts of server building.
Successfully complete this lab by achieving the following learning objectives:
- Manually Install Software on webserver-01
On the instance
webserver-01, which is already setup in the AWS Account, complete the following tasks:
- Update the cache of available packages using the Aptitude Package Manager
- Install the Apache2 Web Server, and ensure you can connect to it using your browser
- Install the
unziputility, and use it to download and install the AWS CLI v2
- Build a new
index.htmlfile for Apache to include the following details, gathered from the instance metadata service
- Availability Zone
- Instance ID
- Public IP
- Private IP Address
- Confirm that the new page loads in your browser
- Use a Bootstrap Script to Build webserver-02 and Debug Issues
We will now create an instance to be configured the same as above, but accomplished using bootstrapping instead of manual configuration.
Create a new EC2 instance running Ubuntu Server 20.04. Ensure it is created with a Public IP, using the
EC2SecurityGroup, and with the name
webserver-02. When creating the instance, use the bootstrap script provided on the A Cloud Guru GitHub:
After launching the instance:
aws --versionto confirm that the correct version of the CLI is installed
psto confirm that Apache is running
Note that despite the bootstrap script attempting to install
mysqld, it isn’t present on the server. We will troubleshoot this in the next objective.
- Use a Fixed Bootstrap Script to Build webserver-03
Lastly, we will use a modified version of our previous bootstrap script to configure a third web server.
webserver-02, our script attempted to install
mysqld, but it failed to complete. Before setting up
webserver-03, we will need to fix the bootstrap script which we used on
Analyze the bootstrap script for
webserver-02, and resolve the issue that would have prevented
mysqldfrom installing, then run the lab. The fully repaired bootstrap script is also available in the Lab Guide when running this lab in Guided mode (not available in Challenge mode).
Tip! Remember that bootstrap scripts can’t require user interaction. Check the commands used to install other packages to identify the difference
Build the instance using the same specifications as previously, but with the name
webserver-03, and the repaired bootstrap script. Login to the instance, and use
psto confirm that
mysqlis running as expected.