How can we achieve zero downtime deployment with database?

How do you achieve zero downtime deployment?

A Blue-Green deployment is a relatively simple way to achieve zero downtime deployments by creating a new, separate environment for the new version being deployed and switching traffic into it. A rollback happens just as easily, with a traffic switch to the old version.

How can I move database without downtime?

Update your Database Schema Without Downtime11 Redundancy – A required evil. 1.1 Rolling Updates.22 Multi-Step Migration Process. 2.1 Backward-Compatible Operations. 2.1.1 Add a table or a view. 2.1.2 Add a column. 2.1.3 Remove a column that's not used by the old and the new version of your application. ... 33 Summary.

What are zero downtime deployments?

Zero downtime deployment is a deployment method where your website or application is never down or in an unstable state during the deployment process. To achieve this the web server doesn't start serving the changed code until the entire deployment process is complete.

How do you get zero downtime deployment in AWS?

At a basic level, a zero downtime deploy involves swapping out servers running new code for servers running the old code on a load balancer. Here is the general scripted process: Create a new Virtual Machine (VM) image with the new code. Start a number of VMs using that image, equal to the number currently running.