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Dorchester Center, MA 02124
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When you launch an EC2 instance, you can use the user-data
to bootstrap a instance creation script.
We can use the following code to start a web server and echo out it’s instance id:
#!/bin/bash
yum update -y
yum install -y httpd
systemctl start httpd
systemctl enable httpd
echo "<h1>Hello World from $(hostname -f)</h1>" > /var/www/html/index.html
Code language: Bash (bash)
Login to your EC2 console and click Launch instances
.
Select an Amazon Machine Image (AMI). We will select Amazon Linux 2
.
Choose an instance type from the list. We will use a Free Tier Eligible t2.micro
. Click Next.
Keep all the options as default and scroll to the bottom of the page. In the User Data
textfield, enter the following code snippet:
#!/bin/bash
yum update -y
yum install -y httpd
systemctl start httpd
systemctl enable httpd
echo "<h1>Hello World from $(hostname -f)</h1>" > /var/www/html/index.html
Code language: Bash (bash)
Click Next.
Do not change any Storage options, and click Next.
Click Add Tag
and enter a Key of Name
and a value of Bootstrapped Web Server
Click Next.
Select Create a new security group
and give it a name and description of EC2 default
and Default security group access for EC2
respectively.
Click Add Rule
and change the Type
to HTTP
.
Click Review and Launch.
Click Launch.
Create a new key pair
from the first dropdown and give it a name of EC2 Instance
.
Click Download Key Pair
and keep it safe. As this is the only time you will ever be able to download it.
Once downloaded, click Launch Instances
.
On the Status Page, click on the instance id that is shown at the top.
In the below example, the instance id is i-062bd33e3189adfcc
.
After a few seconds, you will see the new instance up and running.
Copy the Public IPv4 address
and open a new browser tab/window and paste it in the address bar.
The instance is now up and running and serving HTTP traffic on port 80.
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