Performing Production DB Migration

Kubernetes CLI

We use Kubernetes (k8s) to orchestrate our infrastructure. In production this means if you need to interact with the application you need to setup the k8s cli.

By following those instructions you will have access to the rails console.

Merge Migration

The first step for every DB migration is to merge the migration file to master and wait for the cluster to update. This allows the rails console to recognize that there is a current rails migration that can be performed.

Perform Migration

Using the kubectl rails console you can now run the migration

rake db:migrate

Intermediate issues

The new master application will expect a different database schema, this can cause issues. The migration task should be performed promptly to prevent user issues from occuring.