What is the problem you're trying to solve

As commented by @samuelkarp here
#8596 (comment)

copying it here as well

As is, I think the code has a few races in it which can lead to inconsistency in reading the generated config file (no mutex around the logic in UpdateRuntimeConfig combined with not writing the file atomically). If we don't remove the logic, I'd at least like to get those issues fixed.

Describe the solution you'd like

Update the code to avoid race conditions

Additional context

No response