Kubernetes – Definition, Use Cases and Best Practices at a Glance
Open-source platform for container orchestration. Automates deployment, scaling and management of containerized applications in clusters.
What is Kubernetes (K8s)? Container Orchestration Explained
Kubernetes (K8s) is the de facto standard for container orchestration. Originally from Google and open-sourced in 2014, it now runs a large share of the world’s container workloads. It automates deployment, scaling and operation of containerized apps across clusters. Kubernetes is the “OS of the cloud” – with significant complexity.
This glossary entry for Kubernetes gives you a clear Definition, practical Use Cases and Best Practices at a glance – with examples, pros and cons, and FAQs.
What is Kubernetes?
- Kubernetes – Open-source platform for container orchestration. Automates deployment, scaling and management of containerized applications in clusters.
Kubernetes (from Greek “helmsman”, K8s) is an open-source platform for automating deployment, scaling and management of containerized applications. It manages a cluster of nodes (servers) running pods (smallest deployable unit, usually one container).
Key concepts: Deployments (desired state), Services (network abstraction for pods), Ingress (HTTP routing), ConfigMaps/Secrets (config), Namespaces (logical separation), Horizontal Pod Autoscaler (auto-scaling). The CNCF stewards the project.
How does Kubernetes work?
Kubernetes is declarative: you describe desired state in YAML (e.g. 3 replicas, 512 MB RAM, port 80). The control plane continuously reconciles actual state with desired state and fixes drift. If a pod dies, it is replaced (self-healing). Under load, the HPA scales pods. Rolling updates replace old with new without downtime. The scheduler places pods on nodes based on resources and constraints.
Practical Examples
Microservices platform: 50 services in a cluster on AWS EKS, each scaling independently, rolling updates via CI/CD.
E-commerce auto-scaling: On Black Friday the cluster scales from 5 to 100 pods on CPU/request metrics, then scales back.
Multi-tenant SaaS: Customers in separate namespaces with resource limits and network policies.
ML pipeline: Training jobs on GPU nodes, results deployed as new images and rolled out with canary deployments.
Typical Use Cases
Microservices: Orchestrate many services with discovery and load balancing
Auto-scaling: Scale on CPU, memory, custom metrics or queue depth
CI/CD: GitOps with ArgoCD or Flux for declarative, versioned deployments
Multi-cloud: Same orchestration across AWS, Azure and GCP
Batch: Jobs and CronJobs for data-heavy batch workloads
Advantages and Disadvantages
Advantages
- Self-healing: Failed containers are replaced and traffic redirected
- Auto-scaling: Horizontal and vertical scaling from metrics
- Rolling updates: Zero-downtime deployments
- Portable: Runs on any cloud, on-prem and locally
- Ecosystem: Helm, Istio, ArgoCD, Prometheus, Grafana and more
Disadvantages
- Complexity: Steep learning curve and many components
- Overhead: For small apps (e.g. under 5 services) K8s can be overkill
- Cost: Managed K8s (EKS, GKE, AKS) and infrastructure add up
- Debugging: Distributed systems on K8s need specific tools and skills
- YAML: Manifests can grow to hundreds of lines
Frequently Asked Questions about Kubernetes
Do I need Kubernetes?
Worth it when: you run many microservices (e.g. 5–10+), need auto-scaling and self-healing, multiple teams deploy independently, or multi-cloud portability matters. Simpler options: Docker Compose (local/small), ECS/Fargate (managed containers without K8s), Cloud Run (serverless containers). Start simple and move to K8s when complexity justifies it.
Managed or self-managed Kubernetes?
Managed (EKS, GKE, AKS) is the right choice for most: the provider runs the control plane; you run workloads. Self-managed (e.g. kubeadm, Rancher) gives full control but needs strong ops skills. Cost: EKS about $73/month for control plane plus nodes; GKE has a free tier for the control plane.
How do I learn Kubernetes?
1) Master Docker (containers, images, Compose). 2) K8s basics: run Minikube or kind locally; understand Pods, Deployments, Services. 3) Deploy your own app. Resources: kubernetes.io tutorials, “Kubernetes the Hard Way”, and cloud workshops (EKS, GKE). CKA (Certified Kubernetes Administrator) is a recognized credential.
Direct next steps
If you want to apply or evaluate Kubernetes in a real project, start with these transactional pages:
Kubernetes in the Context of Modern IT Projects
This page provides a concise definition of Kubernetes, practical use cases and best practices at a glance — everything you need to evaluate the technology for your next project. Kubernetes falls within the domain of DevOps and plays a significant role across a wide range of IT projects. When evaluating whether Kubernetes is the right fit, organizations should look beyond the technical merits and consider factors such as existing team expertise, current infrastructure, long-term maintainability, and total cost of ownership.
Drawing on our experience from over 250 software projects, we have found that correctly positioning a technology or methodology within the broader project context often matters more than its isolated strengths.
At Groenewold IT Solutions, we have worked with Kubernetes across multiple client engagements and understand both its advantages and the typical challenges that arise during adoption. If you are unsure whether Kubernetes suits your particular requirements, we are happy to provide an honest, no-obligation assessment. We analyze your specific situation and recommend the approach that delivers the most value — even if that means suggesting an alternative solution.
For more terms in the area of DevOps and related topics, see our IT Glossary. For concrete applications, costs, and processes we recommend our service pages and topic pages — there you will find many of the concepts explained here put into practice.
Related Terms
Want to use Kubernetes in your project?
We are happy to advise you on Kubernetes and find the optimal solution for your requirements. Benefit from our experience across over 200 projects.