Kubernetes Basics
Kubernetes Basics
Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications.
Core Concepts
Pods
The smallest deployable units in Kubernetes that can contain one or more containers.
Nodes
Physical or virtual machines that run your applications and constitute the Kubernetes cluster.
Clusters
A set of nodes that run containerized applications managed by Kubernetes.
Services
An abstract way to expose applications running on a set of pods as a network service.
Key Features
- Container Orchestration
- Automated container deployment
- Load balancing
- Self-healing capabilities
- Scalability
- Horizontal scaling
- Auto-scaling
- Rolling updates
- High Availability
- Multi-node clusters
- Pod replication
- Service discovery
Getting Started
Installation
# Install kubectl
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
# Install Minikube for local development
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube
Basic Commands
# Start Minikube cluster
minikube start
# Deploy an application
kubectl create deployment nginx --image=nginx
# Expose the deployment
kubectl expose deployment nginx --port=80 --type=LoadBalancer
Best Practices
- Resource Management
- Set resource requests and limits
- Implement horizontal pod autoscaling
- Use namespaces for organization
- Security
- Enable RBAC
- Use network policies
- Implement pod security policies
- Monitoring
- Deploy monitoring solutions
- Set up logging aggregation
- Implement alerts
Next Steps
- Learn about Kubernetes manifests
- Explore Helm package management
- Study service mesh implementations
- Implement GitOps workflows