DevOps Classroom Series – 24/Apr/2020

Prerequisite Softwares For DevOps

• Windows:

  • Git For Windows:refer here
  • Visual Studio Code: Click Here

• MAC:

  • Visual Studio Code: Click Here

• Linux Desktop:

  • Visual Studio Code: Click Here

Generalize Pipeline

• Our journey into CI/CD Pipelines as a DevOps Engineer starts when developer finishes coding of some feature and shares it with you
• Sharing Code to Others and Possible Approaches
  • Share the code via Email:
    • Generally we have more that one developer working, then which version of whose mail should be consider
  • Shared Folder:
    • Looks like good option.
    • All of your devteam once finished the code have to copy that in a shared location, so which developers work to take is resolved by dev team
    • Some developers work has caused lot of trouble in testing, so your lead wants to remove the work done by your dev team for that day
  • General Opinion of sharing code:
    • Multiple developers should be able to work in parallel
    • Your code should have some kind of history/version
  • Our dev team software is customized for different customers how to manage that?
• We need some software to manage all of the above challenges
  • Multiple users working parallelly on some code base
  • Version/History Support
  • Capability to maintain different copies of code base
  • Have features like Backup/Restore and Archive
• Version Control System is all about doing the above
• Examples:
  • CVS
  • VSS (Visual Source Safe)
  • Clear Case
  • Subversion
  • Perforce
  • Mercurial
  • TFVC (Team Found Version Control)
  • Git

Evolution in Version Control Systems

• Generations of VCS

  • Client Server:
    • Need a centralized Servers
    • All the developers systems will be clients
    • For Disaster Recovery take a Secondary Setup
    • Take Periodic Backups of VCS
    • For all of this we need a VCS Administrator
    • Two models:
      • Online Clients: For working server needs to connected all the time
      • Offline Clients: Clients can work and when they want to interact can establish a connection to server

  

  • Distributed
    • No Need of Centralized Servers
    • Any system can act as server
    • Backup is just one more system having the code

DevOps Engineers Misconceptions

• Only Developer only will use git(VCS) a lot?
  • Absolutely not, we as DevOps Engineers develop automation to pipeline and we use git to preserve our work
  • Ansible/Chef/Terraform/K8s/Dockerfile which you have developed will be stored in Version Control System
  • So DevOPs Engineers need to have two perspectives of VCS
    • Developer
    • Administrator