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DevOps Intermediate

What is Blue-Green Deployment?

A deployment strategy using two identical environments where traffic is switched from the old version to the new one instantly.

Blue-green deployment maintains two identical production environments. "Blue" runs the current version while "Green" receives the new deployment. After testing Green, traffic is switched from Blue to Green. If issues arise, instant rollback switches back to Blue.

This eliminates downtime during deployments and reduces risk. Challenges include database migrations (both versions must be compatible), double infrastructure costs, and session management during the switch.

Related Terms

Jenkins
An open-source automation server for building, testing, and deploying software through configurable CI/CD pipelines.
Istio
An open-source service mesh that provides traffic management, security, and observability for microservices on Kubernetes.
Incident Management
The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.
Helm
A package manager for Kubernetes that simplifies deploying and managing applications using reusable, configurable charts.
Kubernetes Secret
A Kubernetes object for storing sensitive data like passwords, tokens, and certificates, with base64 encoding and optional encryption at rest.
Continuous Deployment
A practice where every code change that passes automated tests is automatically deployed to production.
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