Dockerization and Kubernetes
Containerize your NestJS application with Docker and learn basic deployment strategies using Kubernetes for scalable hosting.
Why Containerize Your App?
When building server applications like those with NestJS, consistency across environments is key. This is where containerization with Docker comes in.
Docker packages your application and all its dependencies into a single, isolated unit called a container. This ensures your app runs the same way everywhere.
- Consistency: Works the same on dev, staging, prod.
- Isolation: Prevents conflicts between apps.
- Portability: Easily move apps between hosts.
Docker: Images & Containers
Let's understand the two core concepts in Docker:
- A Docker Image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries, and settings. Think of it as a blueprint or a template.
- A Docker Container is a runnable instance of an image. You can create, start, stop, move, or delete a container. Multiple containers can run from the same image.
Images are stored in registries like Docker Hub.