Use cases

• Launch a (web) service without owning any servers
• Start small and scale indefinitely
• Rent compute / storage capacity to handle peaks
• Test in a clean environment.

No hardware!

Several different providers

• Amazon
• Azure
• Google
• Digital Ocean
• City Network Karlstad
• ...

Amazon

• 9 regions across the globe
• 28 availability zones
• at least one datacenter per availability zone
• 50k - 80k servers per datacenter
• 2-5 million servers

Amazon

• build their own servers
• private network with their own fiber links
• build their own networking gear

AWS

Amazon EC2

Rent virtual servers

• From 1 vCPU / 1 GB RAM
• To 36 vCPU / 244 GB RAM
• Pay per hour
• Spin up a new server in "a few minutes"
• Stop it when you´re done

Demo

Create ec2 instance via web

Networking in EC2

• VPC - Virtual Private Cloud
• All instances belong to a VPC
• No firewall between instances in a VPC
• Private IP inside VPC
• Public IP forwarded to private IP via firewall

Networking in EC2

Demo

Create ec2 instance via cli

https://aws.amazon.com/cli/

run-instance

inst_id=$(aws ec2 run-instances \
  --image-id ami-accff2b1 \
  --count 1 --instance-type t2.micro \
  --key-name netinsight \
  --security-groups launch-wizard-1 \
  --query Instances[0].InstanceId \
  --output text)
  
aws ec2 wait instance-status-ok \
  --instance-ids $inst_id
  

run-instance

ip=$(aws ec2 describe-instances \
  --instance-ids $inst_id \
  --query \ 
    'Reservations[0].Instances[0].PublicIpAddress' \
  --output text)
  
scp -o StrictHostKeyChecking=no \
  ./installer ubuntu@$ip:
  
ssh -o StrictHostKeyChecking=no ubuntu@$ip \
  sudo ./installer
  

run-instance

aws ec2 terminate-instances \
  --instance-ids $inst_id \
  --output text
  

installer

apt-get update
apt-get install -y apache2
echo "Behold the power of the Cloud" \
  > /var/www/html/index.html
  

This script runs on the EC2 instance.

Clean environment every time!

Pricing

Prices in SEK. 750 hours of free t2.micro when you sign up

Storage

EBS - Elastic Block Store

• Exposed as a block device in linux
• Use any filesystem
• Use mdadm to raid them
• Lifetime separate from containers
• Can only be mounted on one instance at a time
• Used for root disk by default

S3 - Simple Storage Service

• Object storage (files)
• Store files up to 5TB in size
• Accessible via http
• Can control access
• Can host websites
• Used as storage for many public services
  (Dropbox, Smugmug)

S3 Cost

• 85 GB storage for a month, SEK 28
• Charges for transfer as well
• Prices go down
• Stored 2*10¹² objects in 2013

S3 Demo

Questions?

Try it!

• First 750 hours of t2.micro for free
• Protect your credentials!
• Don't forget to terminate instances