Tutorials Cloud Computing Tutorial
Container Networking — Complete Guide
Container Networking — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of Cloud Computing Tutorial on Toolliyo Academy.
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Cloud Computing Tutorial · Lesson 27 of 100
Container Networking
Foundations ✓ → Platform → Ops → Projects
Platform · 2 — Containers & data · ~6 min · Cloud — Virtualization & Containers
What is this?
Containers talk on bridge/overlay networks with DNS names as service hostnames.
Why should you care?
CloudVerse Compose services resolve `redis` by name; K8s uses ClusterIP DNS.
See it live — copy this example
Use AWS/Azure/GCP free tier or local Docker/Kind. Sketches and YAML are meant to be typed and adapted.
# compose network
# api resolves host "redis" on the default bridge/user network
# K8s: api.default.svc.cluster.local
curl http://redis:6379 # wrong protocol — use redis-cli; idea: DNS nameWhat happened?
- Do not hardcode container IPs.
- Publish ports only when needed.
- Network policies lock east-west traffic later.
Practice next
- Ping service by name.
- Remove host port from Redis.
- Sketch K8s DNS name.
- Create a custom bridge network.
- Block accidental host port.
Remember
DNS service names. Minimal published ports. Policies later.
CloudVerse service DNS
API connects to redis hostname.
Outcome: No brittle IPs in config.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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