Execute a Region switch plan to recover an application
To recover an application when an AWS Region is impaired, you execute a Region switch plan in Amazon Application Recovery Controller (ARC).
If your application is deployed with an active/active approach, the workflows in your plan deactivate the Region that is impaired so that your other active Region is appropriately scaled and begins to receive all of your application traffic.
If your application is deployed with an active/passive approach, the workflows in your plan deactivate the impaired Region and activate your standby Region, by scaling up your resources there, if needed, and redirecting your application traffic to the standby Region.
To perform application recovery manually, run your Region switch plan by doing the following.
Another option is to trigger an execution automatically with specific Amazon CloudWatch alarms that you specify to start a plan execution. You can specify triggers for plan execution when you create or update a plan. For more information, see Create a trigger for a Region switch plan.
To execute a Region switch plan
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In the AWS Management Console, navigate to the AWS Region that you want to activate for your application.
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On the Amazon Application Recovery Controller (ARC) console, choose Region switch, and then select the plan that you want to run.
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Choose Execute plan.
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If your plan includes manual approval steps, approve each step when prompted.
While a plan is executing, you can track its progress on the execution details page, which opens when you choose to execute a plan.
You can also view information about in-progress application recovery on the Region switch dashboards. On the Region switch console, in the left navigation, under Region switch, choose one of the following:
Global dashboard
Executions in Region name
Be aware that, if there are impairments in a Region, the global dashboard might not show all your plan data. Because of this, we recommend that you rely only on Regional executions dashboard during operational events. The Regional executions dashboard is more resilient because it uses the local Region switch data plane.
When plan execution is complete, you can see information about the plan execution, and other plans that Region switch has run, on the Plan details page in the Plan execution history tab.
