Kubernetes orchestrates containerized applications at scale. Here's what developers need to know to deploy and manage applications effectively.
Core Concepts
Pod: Smallest deployable unit, one or more containers
Service: Stable network endpoint for pods
Deployment: Manages pod replicas and updates
ConfigMap: External configuration
Secret: Sensitive data storage
Namespace: Logical cluster partitioning
Deployment
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Service
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Ingress
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ConfigMap and Secrets
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Horizontal Pod Autoscaler
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Persistent Storage
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Jobs and CronJobs
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Rolling Updates
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Resource Quotas
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Network Policies
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Useful Commands
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Best Practices
Resource Management:
✓ Set resource requests and limits
✓ Use namespaces for isolation
✓ Implement resource quotas
✓ Configure autoscaling
Reliability:
✓ Define liveness and readiness probes
✓ Use multiple replicas
✓ Configure pod disruption budgets
✓ Implement graceful shutdown
Security:
✓ Use secrets for sensitive data
✓ Apply network policies
✓ Run as non-root
✓ Keep images updated
Operations:
✓ Use rolling updates
✓ Tag images with versions
✓ Monitor and alert
✓ Document configurations
Conclusion
Kubernetes provides powerful orchestration for containerized applications. Focus on proper resource configuration, health checks, and security. Start simple with deployments and services, then add complexity as needed.