Day 01 – DevOps Career, Lifecycle, and Terraform Automation Essentials

Day 01

Agenda

[02:00 – 04:00] Career Advice
Query from a participant on how to prepare for DevOps interviews.
Emphasis on understanding core concepts, automation, and real-world tools.

[05:00 – 08:00] What is DevOps? (Participant Interaction)
Interactive Q&A with Arun on DevOps definition.
Key points:

Dev + Ops collaboration
Breaking silos
Faster delivery with automation
Agile-compatible process
Continuous integration & delivery

[08:00 – 11:00] DevOps Business Goals
Goals of a DevOps engineer:

Faster delivery with quality
Cost-effective solutions (use open source/cloud)
Zero/minimal downtime
Continuous monitoring and scaling

[11:00 – 15:00] Real-World Scenario (E-commerce Platform Example)
‍ Client example: Arun’s Myntra-like store moving from offline to global e-commerce.
✅ DevOps team responsibilities:

Deliver MVP quickly
Cost reduction via cloud
High availability & autoscaling
Monitor usage patterns and adjust infra

[15:00 – 21:00] DevOps & Agile – The Synergy
DevOps complements Agile SDLC.
Agile Manifesto: prioritizes people, working software, and customer collaboration.
Adapt to client-driven changes even in late development.
Frequent incremental delivery (Sprint model).

[22:00 – 27:00] DevOps Lifecycle & Tools Overview
Key stages: Plan → Code → Build → Test → Release → Deploy → Operate → Monitor
⚙ Sample tools by stage:

Plan: Jira, ZenHub, Azure Boards
Code: GitHub, Bitbucket, GitLab
Build: Jenkins, Maven, Azure Pipelines
Test: Selenium, Karate, JUnit
Deploy: Kubernetes, Ansible, Docker Swarm
Monitor: Datadog, Prometheus, Grafana

[27:00 – 34:00] Infrastructure Automation Introduction
Need infrastructure to run pipelines.
☁ Shift from on-premise to cloud (90% orgs moved).
⚙ Introduced concept of Infrastructure as Code (IaC) using Terraform.

[34:00 – 41:00] Why Cloud? Cost Advantages
Benefits of cloud over on-prem:

Variable expense
Elastic scaling
Global reach in minutes
Speed & agility

On-premise = expensive setup + maintenance.

[42:00 – 45:00] ☁ Multi-Cloud Strategy
☁ Organizations use multiple cloud providers to reduce cost.
Tools like CloudFormation (AWS) and Bicep (Azure) are vendor-specific.
✅ Terraform preferred for multi-cloud infra automation.

[45:00 – 52:00] Terraform Basics
Terraform can automate infrastructure on 5000+ providers.
Prerequisites:

Only basic cloud knowledge (e.g., launching EC2 in AWS).
No need to know Jenkins, Docker, etc., beforehand.

Infrastructure creation needs a “source of truth” – Terraform script.

[52:00 – 58:00] Hands-on Terraform Start
Create Ubuntu server in AWS (guided demo).
Use key pair for secure login.
Demonstrated importance of auditable config (no manual infra!).

[58:00 – 1:07:00] Installing Terraform on EC2
‍ Logged into EC2 server named infra-exec.
Installed Terraform CLI via official script.
Started writing first .tf script with:

Provider plugin block
Provider block
Resource block

[1:07:00 – 1:13:00] Writing First Terraform Script
Created file: script1.tf
Used AWS provider, Ubuntu AMI ID, instance type (t2.micro)
Defined count = 5 to create 5 EC2 instances

[1:13:00 – 1:18:00] ⚠ Credentials Error & IAM Roles
Error: No valid AWS credentials.
Solution:

Create IAM Role with EC2 Full Access
Attach role to the EC2 instance running Terraform

[1:18:00 – End (~1:30:00)] IAM Role Creation & Terraform Execution
✅ Demonstrated:

Creating IAM role with AmazonEC2FullAccess
Attaching role to running EC2
Rerunning Terraform init, validate, plan, and apply