Introduction to Kubernetes

What is Kubernetes?

Kubernetes, also known as K8s, is an open-source container orchestration platform designed to automate deploying, scaling, and operating application containers. It provides a robust framework to run distributed systems resiliently.

Key Concepts

• Containers: Lightweight, stand-alone, executable packages that include everything needed to run a piece of software.
• Pods: The basic deployable units in Kubernetes that can contain one or more containers.
• Nodes: The machines (physical or virtual) that run your containerized applications.
• Cluster: A set of nodes that run containerized applications managed by Kubernetes.
• Services: An abstraction that defines a logical set of Pods and a policy by which to access them.

Installation

To install Kubernetes, you can use tools like Minikube, kubeadm, or cloud providers such as Google Kubernetes Engine (GKE).

Using Minikube

Minikube is a tool that makes it easy to run Kubernetes locally. Here's how to set it up:

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube
minikube start

Basic Commands

kubectl Commands

The command-line tool for interacting with Kubernetes is called kubectl. Here are some basic commands:

kubectl get nodes
kubectl get pods
kubectl create -f deployment.yaml
kubectl delete pod my-pod

Best Practices

• Use namespaces to organize resources.
• Implement resource quotas to manage resource consumption.
• Regularly update and patch your Kubernetes environment.
• Enable RBAC (Role-Based Access Control) for security.

FAQ