<ul><li>Implementing blue-green deployment in real-world systems revealed 10 valuable lessons.</li><li>Ensuring identical environments is challenging even with automation tools like Terraform and Ansible.</li><li>Database schema changes pose a high risk during blue-green deployments, requiring versioned migrations and compatibility shims.</li><li>Issues with DNS propagation, increased costs, monitoring tool adaptability, and the importance of automation and observability were key takeaways.</li><li>Partial rollouts, strong observability, and thorough preparation were highlighted as essential practices for successful blue-green deployments.</li></ul>

Real-World Blue-Green Deployment: 10 Lessons I Wish I Knew Earlier

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