This document provides an introduction to DevOps concepts including what DevOps is, common DevOps skills, roles in DevOps, and demonstrations of tools used in DevOps workflows. Specifically, it defines DevOps as combining development and operations, lists Linux skills, cloud computing platforms, container and deployment tools, CI/CD pipelines, and monitoring tools as part of the DevOps skillset. It also outlines roles like DevOps engineer, SRE, and infrastructure engineer. The document demonstrates several DevOps tools including Linux commands, SSH, Git, Vim, Docker, Terraform, Fabric, GitHub Actions, and monitoring tools.

1. Introduction to DevOps
Workshop @ New Horizon College
@dhilipsiva

2. Vice President Of Engineering @ Reckonsys
Chief Technology Officer @ Nitimis
An Optimistic Nihilist who loves Science, Python, Rust, FOSS, e-
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https://dhilipsiva.com
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3. I have no idea what I am talking about

4. What is DevOps?
DEVelopment + OPerationS
Basically, taking a piece of working code and running it on a cloud
server in a reliable, secure and scalable way

5. DevOps Sikllset
Linux OS (cmd, ssh, git, vim, etc)
Cloud Computing: SaaS, IaaS & PaaS(AWS, GCP, Azure,
DigitalOcean, Heroku, Netlify)
Container Technologies (Docker, Kubernetes, Mesos, Nomad)
IaaC (Terraform, Pulumi, AWS CDK)
Deployment/Configuration tools (Fabric, Ansible, AWS CoPilot,
Chef, Puppet)
CI/CD Pipelines (GitHub Actions, Jenkins, Drone, CircleCI)
Monitoring (APM, Logging) & Alerting (OpenTracing, Pormetheus,
ELK, Google Stackdriver, CloudWatch, Datadog, New Relic)
Bash (Shell) & Python/Ruby Scripting

6. Bonus
Linux scripting & packaging
Memory management, scheduling, filesystems, networking
nginx, traefik, etc.
RabbitMQ, Redis & Elasticsearch
SQL, MySQL, Postgres, MongoDB
AWS services - EC2, RDS, S3, Lambda, Cloudfront, ECR, ECS, EKS,
IAM, DynamoDB, SNS, SQS, EMR, etc.
Understanding of Networking, Load Balancers, HTTP/TCP proxies,
High availability, k8s Ingress routers

7. Roles associated with DevOps
DevOps Engineer
Site Reliability Engineer (SRE)
Infrastructure Engineer

8. Linux Command Line
~ is the current user's HOME directory /home/username
. current and .. parent directory
.hidden files and directories
syntax:
cmd argument1 [optional-argument2] --option1 --option-with-
value some-value
pwd present working directory
ls list files and directories
cd change directory

9. Linux Command Line (contd.)
touch create empty file
mkdir make directory
rm remove file[s]
rmdir remove directory
cp copy & mv move
man manual
cat conCATenate
{} expand / shorthand

10. RSA - public key cryptography
ssh-keygen -t rsa -b 4096
private key - super secret password like file
public key - public file that can be shared with anyone and
everyone
passphraze - password
~/.ssh directory

11. SSH
Secure Shell [remote terminal]
ssh username@host
~/.ssh/authorized_keys

12. Git
https://docs.github.com/en/get-started/quickstart/hello-world
git clone clone a repository
git pull pull latest changes from remote
git push push local changes to remote
git commit commit changes
git merge to merge the branches
git checkout checkout / create branches
git reset reset all changes
git stash stash all changes

13. Vim - Text Editor
Press Esc key to enter NORMAL (or COMMAND ) mode. This is the
default mode that the editor opens in. In this mode, you can
execute commands
Press i key to enter INSERT mode. In this mode, you can insert
text. Press Esc to go backk to NORMAL mode
Press v key to enter VISUAL mode. In this mode, you can selct text
and do cut ( x ) / copy ( y yank) / paste ( v )
In NORMAL mode: type :w to write; :q to quit; :wq to write and
quit and :wqa to write and quit all

14. Cloud Computing
Basically running code on a remote server
Software as a Service (SaaS): Gmail, Google Drive, WhatsApp,
Twitter
Infrastrcture as Service (IaaS): AWS, DigitalOcean
Platform as a Service (PaaS): Heroku, Netlify

15. Digital Ocean
https://www.digitalocean.com/github-students
Let's explore some of the services that DO offers.

16. Docker
Like virtual machine, but lightweight and without hardware emulation
Demo
Build a sample image
Push it to DockerHub
Let the students pull and run it
Walk then through bigga

17. IaaC
Show a demo of using Terraform with DigitalOcean + Docker

18. Deployment/Configuration tools
Show a demo of using fabric to install & configure packages

19. CI/CD Pipelines
Show a demo with GitHub actions

20. Monitoring & Alerting
Show a demo of Sentry and uptrace.dev

21. Thanks!
https://github.com/dhilipsiva/talks
This copy is released under the MIT License
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