EC2 Fundamentals-AWS

Budget Setup!

EC2 Basics

  • Virtual Machines (EC2)
  • Data storage on virtual drives (EBS)
  • Distributing load across machines (ELB)
  • Scaling the services using an auto-scaling group (ASG)

Now, in order to use EC2, you need to configure some stuff as well. Those are CPU, RAM, Storage space, Network card: speed of the card, public IP address, security group, and Bootstrap script: EC2 user data which only runs at launch.

  • Installing updates
  • Installing software and other tasks.

Launching EC2 Instance:

AMI & Instance Type & User Data!

EC2 Instance Type:

→ m5.2xlarge
m: instance class
5: generation
2xlarge: size within the instance class

Storage & Tags & Security Groups!
The instance is launched!
Instance Reply via public IP!

EC2 User data →
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

Security Groups (SG):

  • Access to ports
  • Manage IP ranges (IPv4 and IPv6)
  • Control inbound network
  • Control outbound network
  • SG can be attached to multiple instances.
  • Can be locked down to a region.
  • SG lives outside of EC2. If SG blocked something, then EC2 will not see it.
  • Maintain one SG for SSH access.
  • If the application is not accessible (time out). then it’s a security group issue.
  • Connection refused, then it’s an application error.
  • All outbound traffic is authorized by default.

Some classic ports that you need to know:

  • 22 (SSH) to log into a Linux instance
  • 21 (FTP) file transfer protocol to upload files into a file share
  • 22 (SFTP) secure file transfer protocol to upload files using SSH
  • 80 (HTTP) to access secured websites
  • 443 (HTTPS) to access secured websites
  • 3389 (RDP) remote desktop protocol to log into a windows instance.
Security Group!

chmod 0400 EC2Learning.pem

ssh -i EC2Learning.pem ec2-user@39.500.365.125

EC2 Instance Connect:

EC2 Instance Connect and Accessed!
  • On-Demand Instances: short workload, predictable pricing
    — pay for what you use
    — Linux and windows — pay per second
    — other OS — pay per hour
    — No commitment
    — Pay high per use
  • Reserved (Minimum 1 year): Up to 75% discount compared to On-Demand (1 year to 3 years)
    — Reserved Instance: long workloads(Reserve a specific instance type: for a database)
    — Convertible Reserved Instances: long workloads with flexible instances (Can change EC2 instance)
    — Scheduled Reserved Instances: Example — every Monday between 3–6 pm
  • Spot Instances (highest discount on AWS -95% compared to On-demand)
    — Spot price can change and if you don’t pay then you will lose
    — Not suitable for critical jobs and databases
  • Dedicated Hosts:
    — An Amazon EC2 dedicated host is a physical server with EC2 instance capacity fully dedicated to your use. That helps with compliance requirements and reduces costs by allowing you to use your existing server-bound software license.
    — Allocated for your account for a 3-year reservation.
    — Costly
  • Dedicated Instances
    — Instances running on hardware dedicated to you.
    — May share hardware with other instances in the same account
    — No control over instance placement (can move hardware after stop/start)




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Mahedi Hasan Jisan

Mahedi Hasan Jisan

Python Developer

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