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Our company has broken up most of our large Monolith application into smaller Microservices and we have a clear plan on how to get new services on Kubrenetes into a CI/CD pipeline.

However, we still have some parts of our applications which have not been broken up because of their database dependencies and the fact that they require downtime to deploy because of DB Migration issues. Part of the problem is that we have a large number of stored procedures which contain business logic in them.

I've seen plenty of information about how to refactor code and APIs so that we can have Blue/Green/Canary deployments. But how do we this for DB changes or migrations without downtime?

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