...
With the existing architecture, deploying a new stack is as simple as running a stack-builder script providing a new instance number. Once the stack is buildbuilt, appropriate the staging CNAME is changed to point to the new stack, thereby making that stack accessible to the public.
...
With the existing architecture, prompting promoting the staging stack (102) to become production is as simple as assigning the production CNAME to stack 102’s ABLALB. All new web-services requests will then start going to the 102 stack. At that point, the old production stack (101) can be deleted.
...