VED-1233: Replace manual release steps#1437
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- Added steps to set the Terraform workspace and manage shared Lambda triggers during blue/green deployments in the deploy-backend.yml workflow. - Introduced a new script, manage_blue_green_event_source_mappings.sh, to handle the preparation and cleanup of event source mappings for Lambda functions. - Updated README.md to document the new blue/green Lambda trigger handoff process, removing manual steps from the deployment flow.
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This branch is working on a ticket in the NHS England VED JIRA Project. Here's a handy link to the ticket: VED-1233 |
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…event_source_mappings.sh - Introduced a new delete_mapping function to handle the deletion of AWS Lambda event source mappings, including a timeout mechanism for deletion confirmation. - Updated adopt_mapping function to utilize the new delete_mapping function, improving the logic for handling target and counterpart mapping UUIDs. - Enhanced code clarity and maintainability by restructuring the mapping lookup and deletion process.
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Can this script delete a live lambda event source mapping before terraform apply - outside any saved plan?
This should only be used for the controlled migration. If this script fails between the adopt and apply then state and/or AWS can get out of sync which will not be recorded in the artifact.
Can we move this to a dedicated migration workflow (or behind a one-time flag per env)?
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Looking really good - just a few questions and comments.
- Added a new workflow for migrating event source mappings, allowing controlled one-time migrations for specific environments. - Updated the deploy-backend.yml workflow to include concurrency settings and additional steps for Terraform initialization, formatting, validation, and applying event source mappings. - Refactored the Makefile to introduce new commands for formatting checks, validation, and applying Terraform plans. - Enhanced the adopt_event_source_mappings.sh script to support verification of event source mappings and improved logging for existing mappings. - Updated README.md to document the new migration process and rollback procedures for event source mappings.
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Automated blue/green Lambda trigger handoff in deployment by adding pre-plan state adoption and pre-apply stale-trigger cleanup steps to the backend workflow.
Added manage_blue_green_event_source_mappings.sh to resolve live mapping UUIDs, re-import shared delta and id-sync event source mappings into the target Terraform workspace, and delete obsolete side-specific mappings.
This removes the manual release checklist steps (“Disable delta” and “Disable ID sync”), making releases faster and reducing risk of human error during blue/green cutovers.