AWS Classroomnotes 03/Mar/2023

Administrative Scenarios and How to solve them

Scheduling start and stop of ec2

• Create a ubuntu 20.04 in any region (Ensure that there is only one instance)
• I have developers in my team who use this instance. I want to shutdown this ec2 instance at 6:00 PM every week day and start it at 10:00 AM every weekday.
• Possible Solutions:
  • Manual
  • Linux/Windows Machine with AWS CLI installed
    • From aws cli we can start or stop the ec2 instance
    • Linux: Cronjob to start or stop ec2 instance
    • Windows: Task Scheduler to start or stop the ec2 instance
    • CI/CD: From jenkins/any ci/cd create a job to start and stop at a scheduled time
    • skills: AWS CLI
  • Cloud Watch Scheduler
  • Lambda:
    • From code (python/nodejs/java/.net) to start and stop ec2
• Cloud Watch Scheduler
  • Create a rule in Cloud Watch Events with schedule
    
    
    
    
    
  • known problems: Adding Targets requires you to give instance id’s. In AWS we have tags. API To start instance was not found
  • If we use Event Bridge we have access to all APIs but we need some role to do the job. We need to configure the role
• To solve this problem
  • Fetching instance ids
  • Configuring Role
• CLI option:
  • Need to work with aws cli i.e. configure IAM user
  • need to understand json
  • Searching aws cli options
• Lambda:
  • Knowing a programming language
  • Configure IAM Role

Updating OS in EC2 instance

• I have an ec2 instance with ubuntu 20.04, in this i need to install an os update (Patching)
• Possible Solutions: Try to figure out

Securing Access

• You are an aws administrator and your organization has two projects and keys are maintained at project
• You were asked to do some activity on linux machine (ec2 instance)
• How can you login without ssh key

Lost PEM file

• Some of your team member has lost pem file and we need to recover the server.