https://github.com/tanjib-rafi/ops-odyssey

https://github.com/tanjib-rafi/ops-odyssey

azure-container-registry azure-kubernetes-service k8s kubernetes

Last synced: 3 months ago
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• Host: GitHub
• URL: https://github.com/tanjib-rafi/ops-odyssey
• Owner: Tanjib-Rafi
• Created: 2024-11-05T17:17:40.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-08-14T17:54:36.000Z (4 months ago)
• Last Synced: 2025-08-14T19:34:53.600Z (4 months ago)
• Topics: azure-container-registry, azure-kubernetes-service, k8s, kubernetes
• Homepage:
• Size: 188 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# 🐳 Kubernetes Overview

Kubernetes is a powerful system for managing containerized applications across multiple hosts. It automates deployment, scaling, and operations of application containers.

## 🍲 Pods

A **Pod** is the smallest deployable unit in Kubernetes. It can contain one or more **tightly coupled containers** that work together to complete a task. Containers within a Pod:

- **Share Networking**: All containers in a Pod share the same IP address and network ports.

- **Share Storage**: Containers in the same Pod can access shared storage volumes.

> **Example**: Use a Pod to run a single application container or a set of containers that need to work closely together.

## 📡 Services

Services in Kubernetes manage networking and allow communication between Pods and other parts of the application, both internal and external.

### Service Types:

- **ClusterIP**: Exposes the service within the Kubernetes cluster.  

  _Best for internal-only communication between services._

- **NodePort**: Exposes the service on a specific port on each Node in the cluster.  

  _Accessible externally via `:`._

- **LoadBalancer**: Creates an external load balancer and assigns a fixed external IP.  

  _Ideal for distributing traffic across multiple Pods._

- **Ingress**: Manages external access to services, typically HTTP/S, and provides load balancing, SSL termination, and name-based virtual hosting.  

  _Allows you to define rules for routing traffic based on URLs or domain names._

### Port Definitions:

In a Kubernetes `Service` specification, the following ports can be defined:

- **port**: 

  - The port that the Service listens on within the cluster.

  - Used by clients to access the Service.

- **targetPort**: 

  - The port on the Pod that the Service forwards traffic to.

  - This is where the actual application listens for requests.

- **nodePort**: 

  - A specific port that is opened on each Node in the cluster when using `NodePort` service type.

  - It allows external traffic to access the Service via `:`.

  - It is used for development mostly

- **containerPort**: 

  - The port on which the container itself is listening.

  - This is defined in the Pod specification, often used for documentation purposes.