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Testing systems and infrastructure to ensure they behave as expected. Covers sanity checks, connectivity testing, environment verification, failure scenarios, and validating assumptions before shipping to production.

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Day 8: Test your network (prove it works)

· 26 min read
Norah Klintberg Sakal
Norah Klintberg Sakal
AI Consultant & Developer

Test your network (prove it works)

What you'll learn

How to validate your VPC infrastructure by launching a test instance and verifying connectivity

Trust, but verify​

Days 3-7: You built the entire network infrastructure

Today: We prove it actually works

Here's the situation:

You've built:
✅ VPC with Internet Gateway
✅ Public and private subnets
✅ NAT Gateway
✅ Route Tables
✅ Security Groups

But you haven't actually tested any of it.

What if:

  • NAT Gateway isn't running correctly?
  • Route tables have the wrong associations?
  • Secure Groups are blocking traffic?
  • Something is misconfigured?

You'd fund out after deploying your containers (painful debugging)

Solution: Test first, deploy second.