OPS345 Lab 1

THIS PAGE IS A DRAFT, NOT A REAL COURSE PAGE

The current schedule for OPS345 is here: OPS335_Weekly_Schedule

AWS Console

Log in here: https://awsacademy.instructure.com

Click "Courses" > "AWS Academy Learner Lab - Foundation Services" > "Modules" > "Learner Lab - Foundational Services"

Click "Start Lab". The first time this will take a few minutes. This will spin up all your EC2 instances which automatically shut down 4 hours after you start the lab. But your data will not be lost. Your VMs will persist until the end of the course.

AWS cost monitoring

• Students are responsible for their AWS usage, including paying for it
• No AWS alerts on AWS educate account
• For those not using AWS educate: Amazon CloudWatch billing alarms
• Always keep cost in the back of your mind when doing /anything/ on AWS

Basic security on a public-facing server

• A good AWS password, not used anywhere else
• Remove default usernames
• Whenever possible: don't use passwords at all, use SSH keys for logging in
• root is never allowed to log in remotely
• How to use sudo and how to configure it
• ssh keys, same as OPS245
• How to organise your SSH keys and not lose them

AWS networking

• Default dynamic public IP
• Default static private network/IP
• Reserving a static public IP under "Elastic IPs", cost of doing that

First AWS VM

• Deploy a pre-built SuSE VM ("Instance") suse-sles-15-sp2-v20201211-hvm-ssd-x86_64
  • Instance type t2.micro - sort of almost free
• Differences between SuSE and CentOS
• Explore the VM:
  • connect with user ec2-user, ssh key
  • no yum, use zypper
  • systemctl
  • passwd, shadow, group files
  • netstat -atnup
  • Create senecaid-admin user, no password, add to wheel group, modify /etc/sudoers
  • Confirm can log in as senecaid-user and successfully sudo su
  • Delete ec2-user