Mastering Kubernetes: The Orchestrator System for Deployment Automation
In the world of cloud technology, we could say that a revolutionary tool is Kubernetes. This orchestrator system has become a fundamental piece for our deployment automation projects and is specially designed for microservicies-oriented environments..
Kubernetes has a great capacity to orchestrate and automate application deployments in complex environments. This system is particularly useful when working with microservicies environments, where applications are divided into smaller, autonomous components that can be scaled and managed independently.
A Brief History of Kubernetes
Before diving into the technical details, it’s interesting to know a bit of history behind Kubernetes. The term “Kubernetes” comes from Greek and means “helmsman” or “pilot.” It was created by a team of Google engineers in 2014, and due to its success, Google decided to donate the project to the Linux Foundation in 2015. Since then, it has rapidly evolved and has become a fundamental tool for container management and application orchestration.
The Basic Unit of Kubernetes: The Pod
When we talk about Kubernetes, it’s essential to understand the basic unit that composes it: the pod. A pod can be considered as a virtualized operating system within another operating system. It is a logical entity that encapsulates one or multiple applications along with their dependencies in an isolated environment. Within a pod, applications run in Docker containers, ensuring portability and the ability to scale the applications.
Microservices-Oriented Architecture
Microservices-oriented architecture is a software development approach in which applications are divided into smaller, autonomous basic services. Kubernetes is a perfect tool for managing this architecture as it allows lightweight and flexible communication between different services. Instead of having a monolithic application where all components are interconnected, in a microservices architecture, each service runs independently and can be scaled individually according to needs.
Development Software
Application = set of basic services
Lightweight communication
Key Elements of Kubernetes
In Kubernetes, there are several key elements that play a fundamental role in application orchestration and management.
Pods
As mentioned earlier, pods are the basic units of Kubernetes. Each pod encapsulates one or multiple applications along with their dependencies, allowing for an isolated and scalable environment.
Deployments
Deployments are an abstraction that defines the desired state of pods and controls their deployment and update. They provide a declarative way to manage applications, ensuring the correct number of replicas is running at all times.
Services
Services are an abstract network layer that exposes pods and enables communication between them. They act as a stable interface to access applications in a Kubernetes cluster, regardless of their location or changes in the underlying infrastructure.
Persistent volumes
Persistent volumes are durable storage resources used to store data persistently in pods. They provide a mechanism for applications to store and retrieve data even after pod restarts or migrations.
In conclusion, Kubernetes is a highly efficient and scalable orchestration system that automates deployments in microservices-oriented environments. With its basic elements like pods, deployments, services, and persistent volumes, Kubernetes gives us the ability to manage applications flexibly and securely.
By mastering this tool, Cloud Levante’s IT engineers can optimize deployments and make the most out of the microservices architecture.
