How do I implement blue/green deployments for Flyway?

Blue/green deployments are a software release management strategy that allows for smooth transitions between different versions of an application with minimal downtime. When implementing blue/green deployments for database migrations with Flyway, it’s essential to manage both the application server and the database schema simultaneously. This approach ensures that the application seamlessly switches between two environments, enhancing reliability and reducing risk during the deployment process.

Implementing Blue/Green Deployments with Flyway

To achieve blue/green deployments in Flyway, you can follow these steps:

  1. Create two separate database schemas (e.g., blue and green).
  2. Deploy your application to the blue environment first, run migrations using Flyway to the blue schema.
  3. Test the blue deployment thoroughly.
  4. Switch the traffic from the green schema to the blue schema.
  5. If issues arise, roll back to the green environment.

Here is an example of a Flyway migration script to create a new table:

-- V1__Create_person_table.sql CREATE TABLE person ( id SERIAL PRIMARY KEY, name VARCHAR(100) NOT NULL, age INT NOT NULL );

Blue/green deployments Flyway database migrations application deployment version control

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