Kubernetes - Namespaces

Introduction

• Namespaces in Kubernetes provide a way to divide cluster resources between multiple users or teams.
• They are virtual clusters within a physical cluster, allowing for isolation and resource management.
• Each namespace has its own set of resources, such as pods, services, and deployments, which are independent of resources in other namespaces.
• This helps in organizing and managing applications and resources in a more efficient and scalable manner.

• Sample YAML:

  apiVersion: v1
  kind: Namespace
  metadata:
    name: my-namespace
  

• Common use-cases for using namespaces:

1. Resource Management:
   • You can allocate resources among the different namespaces, effectively creating a form of quota for teams or projects.
   • This helps prevent one team or project from using up all the resources.
2. Access Control:
   • You can use Kubernetes Role-Based Access Control (RBAC) to control who can access what within each namespace.
   • This allows you to isolate teams or projects from each other, providing a level of security.
3. Environment Isolation:
   • You can use namespaces to create isolated environments for different stages of your application lifecycle, like development, testing, and production.
   • Each environment can have its own set of resources, configurations, and access controls.
4. Organizational Efficiency:
   • Namespaces can reflect your organization’s structure, with each department, team, or user getting their own namespace.
   • This can make it easier to manage and locate resources.
5. Multi-tenancy:
   • If you’re a service provider, you can use namespaces to create a multi-tenant environment, where each tenant has their own isolated namespace.