Deployment Slots Blue Green Deployment is a method of deploying applications that allows you to test new versions of an application without affecting the live version. It is an advanced deployment technique that minimizes downtime and enables you to roll back easily if something goes wrong.
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When you use the Deployment Slots Blue Green Deployment method, you create two identical environments, known as ‘slots.’ One slot is the ‘production’ environment, which hosts the live version of your application. The other slot is the ‘staging’ environment, which hosts the new version of your application.
The staging environment is where you test your new application before making it live. You can run automated tests and manual tests to make sure everything works as intended. Once you are satisfied with your testing, you can swap the slots so that the staging environment becomes production and vice versa.
The main advantage of using this deployment technique is that it eliminates downtime. When you swap slots, there is no interruption in service for your users because both environments are identical. This means that even if something goes wrong with the new version of your application, you can quickly roll back to the previous version without any downtime.
How Does It Work
The Deployment Slots Blue Green Deployment method involves creating two Azure App Service deployment slots: one for production and one for staging. You deploy your current application code to both slots initially. Then, when you’re ready to release a new version of your application, you deploy it to just the staging slot.
You can then perform testing on the new version in isolation from production traffic. Once all tests have passed successfully, swap traffic from production to staging by swapping their URLs. This results in all incoming traffic moving from production to staging while outgoing traffic continues from staging to production.
After the swap, the new version of your application is running in production, and the previous version is running in the staging slot. If something goes wrong with the new version, you can quickly revert to the previous version by swapping URLs again.
Benefits of Deployment Slots Blue Green Deployment
The benefits of using Deployment Slots Blue Green Deployment are numerous:
- Minimizes downtime: Since there is no downtime during deployment, your users can continue to use your application without any interruptions.
- Easier rollbacks: If something goes wrong with a new release, you can quickly roll back to a previous release without any downtime.
- Easy testing: You can test new features and bug fixes in isolation and independently from production traffic.
- More frequent releases: Since there is no downtime during deployment, you can deploy more frequently to keep up with rapidly changing business needs.
Conclusion
The Deployment Slots Blue Green Deployment method is an excellent way to deploy applications that minimizes downtime and enables easy rollbacks. It allows for easy testing and more frequent releases, making it an ideal choice for businesses with rapidly changing needs.
By creating two identical environments for production and staging, you can ensure that your users have uninterrupted access to your application while you make changes behind the scenes.
