# Webserver Implementation **Purpose** * Launching a webserver **Steps** 1. **Creating an EC2 instance for web server** * Choose AMI: Amazon Linux AMI 2017.09.0 (HVM), SSD Volume Type (Tick Free tier only if needed) * Choose Instance Type: t2.micro * Configure Instance Detail: * If tick "Protect against accidental termination", instance termination would be disabled. Turning termination protection off by Actions -> instance settings -> Change termination protection. * Advanced Details -> "User Data" -> "As text" to specify bash scripts to be run. See "3.(2)" in article. * IAM Role: Select role with "AmazonS3FullAccess" privilege if a S3 operation is required. * Add Storage: Change "Volume Type" to: "Magnetic" * Add Tag: Add "key", "value": "name", "MyEC2WebServer" (Should tag as much as possible for future cost control) * Configure Security Group: * Create a new security group and give the name, description as "MyWebDMZ" (Demilitarized Zone) * Add Rule: HTTP, HTTPS * When be asked needing to select or create a key pair * Choose: "Create a key pair" and give the key pair name: "MyEC2KeyPair" * click "Download Key Pair" * click "Launch instance" 2. **Preserve key pair file**\ Creating a SSH folder (could be everywhere) to store key pair file ``` $ cd ~/Downloads $ mkdir SSH $ mv MyEC2KeyPair.pem SSH $ cd SSH $ chmod 400 MyEC2KeyPair.pem ``` 3. **Creating a web server**\ There are several ways to achieve:\ (1) **Manually link to the instance and install a web server**\ Linking through SSH, input "yes" for first login. The i option is for file. ``` $ ssh ec2-user@${ec2_public_ip} -i MyEC2KeyPair.pem ``` Switch user to make package update and web server installed ``` $ sudo su $ yum update -y $ yum install httpd -y ``` Adding a index page. Turning on the web server and browsing to the instance ip should see the result. ``` $ cd /var/www/html/ $ vim index.html $ service httpd start ``` Add web server as a routine when instance is activated. ``` $ chkconfig httpd on ``` (2) **Running shell commands during instance initiation**\ Above manual process can be done with shell commands. When creating instance, "Configure Instance" -> "Advanced Details" -> "User data" choose "As text" and give below text. ``` #!/bin/bash yum install httpd -y yum update -y echo "Hi, this is a webserver." > /var/www/html/index.html service httpd start chkconfig httpd on ``` (3) **Running shell commands with a S3 bucket**\ Above manual process can be done with shell commands. When creating instance, On "Configure Instance" page with following actions: * IAM Role -> Select a role with "AmazonS3FullAccess" privilege. * "Advanced Details" -> "User data" choose "As text" and give below text. ``` #!/bin/bash yum update -y yum install httpd -y aws s3 cp s3://${bucket_name}/${directory} /var/www/html --recursive service httpd start chkconfig httpd on ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ysfang82.gitbook.io/development-notes/aws-notes/lab/running-ec2.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.