Kubernetes (оркестрация контейнеров)
Kubernetes is a system for managing containers and applications across server infrastructure. It lets you automatically deploy, scale, and update services without downtime.
As a project grows, managing servers manually becomes harder. Kubernetes combines several servers into a cluster and distributes the load between them automatically.
In short, it is a tool for keeping applications running reliably and scaling them as needed.
running reliably and scaling applications
How Kubernetes works
Kubernetes manages a cluster of servers that operate as a single system.
Control Plane
Manages the cluster and schedules workloads.
Worker nodes
The servers that run your applications.
Pod
The smallest deployable unit, containing the application container.
Service
Provides stable access to an application even when containers are restarted.
Advantages of Kubernetes
Automatic scaling
The system increases the number of application instances as the load grows.
Fault tolerance
If a container fails, it is restarted automatically.
Zero-downtime updates
New versions are rolled out without taking the service offline.
Efficient use of resources
The load is spread across the servers in the cluster.
When to use Kubernetes
With a microservices architecture
When the load is high or unpredictable
When high availability is required
When you are planning to scale the project
For small websites, a single server is usually enough. Kubernetes becomes relevant as your infrastructure grows.
Deploying Kubernetes
A cluster can be deployed on one or more servers.
Main steps:
Prepare the servers
Install the container runtime
Initialize the cluster
Join the worker nodes
Configure networking and access
Once configured, the cluster is ready for application deployment.
Minimum resources to get started
An entry-level cluster can run on a server with:
2 vCPU
4 GB RAM
SSD storage from 50 GB
Resources can be scaled up as the project grows.
Conclusion
Kubernetes helps you build scalable, resilient infrastructure, automate application management,
and keep services running reliably under changing load.