devopsgeek1979

Cloud Infrastructure Provisioning Checklist - AWS & Multi-Cloud Strategy

Pre-Deployment Planning

1. Requirements Gathering

• Define application architecture (monolith vs microservices)
• Identify compute requirements (CPU, RAM, storage)
• Plan network topology (VPC, subnets, security groups)
• Define disaster recovery (RTO, RPO)
• Budget estimation and cost optimization

devopsgeek1979

OpenShift Container Platform - Kubernetes on Steroids

OpenShift is Red Hat's enterprise Kubernetes distribution with additional features for DevOps, security, and developer experience.

OpenShift vs Kubernetes - Key Differences

Feature	Kubernetes	OpenShift
Security	Basic RBAC	Enhanced RBAC + SELinux
Registry	External	Built-in internal registry

devopsgeek1979

# Kubernetes Fundamentals - Deployment, Services, and Ingress Quick Reference

## Kubernetes Architecture Overview
```
┌─────────────────┐
│   Control Plane │
├─────────────────┤
│ API Server      │
│ Scheduler       │
│ Controller Mgr  │

devopsgeek1979

# Complete DevOps Workflow - From Code to Production

## 1. Development Phase - Local Testing
```bash
# Clone repository
git clone https://github.com/devopsgeek1979/terraform-basic.git
cd terraform-basic

# Format and validate code locally
terraform fmt -recursive

devopsgeek1979

DevOps Interview Q&A - Terraform, Ansible, CI/CD

Terraform Questions

Q1: What is Terraform State and why is it important?

A: Terraform state is a file (terraform.tfstate) that records the real-world resources that Terraform manages. It's crucial because:

• Tracks mapping between resource definitions and actual cloud resources
• Enables Terraform to know what changes to apply
• Prevents duplicate resource creation
• Should be stored remotely (S3, Azure Storage) for team collaboration

devopsgeek1979

# Terraform Best Practices & Production Checklist

## 1. Code Organization & Structure
```
terraform/
├── backend.tf          # Remote state configuration
├── provider.tf         # Provider settings
├── variables.tf        # Input variables
├── outputs.tf          # Output definitions
├── main.tf             # Main infrastructure code

devopsgeek1979

# Linux System Administration Quick Reference (RedHat/CentOS/Ubuntu)

## File & Directory Management
# Find files modified in last 7 days
find /var/log -type f -mtime -7 -ls

# Find large files (>100MB)
find / -type f -size +100M 2>/dev/null

# Secure file deletion

devopsgeek1979

# Ansible Tower/Controller Installation & Setup Playbook

---
- name: Bootstrap Linux for Ansible Controller
  hosts: all
  become: yes
  gather_facts: yes
  tasks:
    - name: Update system packages
      package:

devopsgeek1979

# VMware vSphere Terraform Provisioning - Quick Reference

## vSphere Provider Configuration
terraform {
  required_providers {
    vsphere = {
      source  = "hashicorp/vsphere"
      version = "~> 2.3"
    }
  }

devopsgeek1979

# Multi-Cloud Terraform - AWS VPC + Azure VNet Quick Deploy

## AWS Provider & VPC Setup
provider "aws" {
  region = var.region
}

resource "aws_vpc" "main" {
  cidr_block           = "10.0.0.0/16"
  enable_dns_hostnames = true