ARC Region switch plan execution block
The Region switch plan execution block allows you to orchestrate the order in which multiple applications switch over to the Region that you want to activate, by referencing other, child Region switch plans. Using this parent/child relationship, you can create complex, coordinated recovery processes that manage multiple resources and dependencies across your infrastructure.
Configuration
When you use the Region switch plan execution block, you select a specific Region switch plan that you want to be executed in the workflow of the plan you're creating.
Important
Before you configure the execution block, make sure that you have the correct IAM policy in place. For more information, see Sample policy for plan execution blocks.
To configure a Region switch plan execution block, enter the following values:
Step name: Enter a name.
Step description (optional): Enter a description of the step.
Region switch plan: Select a plan to execute in the workflow for the current plan.
Then, choose Save step.
How it works
Use the Region switch plan execution block to create nested workflows with parent/child relationships. Note that this execution block does not support additional levels of child plans, and limits the number of nested child plans. Child plans must support the same Regions that the parent plan supports, and must have the same recovery approach as the parent plan (that is, active/active or active/passive).
This block supports both graceful and ungraceful execution modes. Ungraceful settings will start child plans with their ungraceful configuration. If Region switch block was executed gracefully, and then switched to ungraceful execution mode, any child plan will also switch to ungraceful execution mode.
What is evaluated as part of plan evaluation
If you share a plan across accounts, and the plan is no longer shared with the account of the parent plan, Region switch evaluation returns a warning that the plan is not valid.