What is Kubernetes?

What is Kubernetes?

Kubernetes is a container orchestration platform that schedules, monitors, restarts, and updates containerized applications across multiple servers. Its role is not just to run containers; it keeps services available, routable, and deployable in a controlled way.

Docker focuses on packaging and running a container. Kubernetes focuses on managing many containers together, which makes it useful when a system has growing traffic, multiple services, or high availability requirements.

Core Components

• Pod: The smallest deployable unit in Kubernetes, usually representing one application container.
• Deployment: Defines replica count, update strategy, and rollback behavior.
• Service: Provides a stable network address for pods whose internal IPs can change.
• Ingress: Routes external HTTP traffic to the right service.
• ConfigMap and Secret: Keep configuration and sensitive values separate from the application image.

Business Use

Kubernetes is common in SaaS products, microservice platforms, high-traffic APIs, and enterprise systems that need scaling, self-healing, and near-zero-downtime releases. For example, payment, inventory, and notification services can scale independently instead of forcing the whole application to grow at once.

It is not automatically the right choice for every project. A small corporate website or single-service application may not justify the operational overhead. But when a multi-service system packaged with Docker has clear microservice boundaries, Kubernetes can make operations more predictable.

At Barlas Dijital, the Kubernetes decision is usually made by weighing expected traffic, team capacity, observability needs, and cloud cost together.