Enable Puma on `canary.gitlab.com`
Canary will be the first production stage to have puma configured. This outlines the plan to enable it there, as well as any validation testing that needs to be done
Update HAProxy to use the new
/readinesshealth check for unicorn so haproxy is configured properly when we switch to puma
- Create a dashboard for validating puma vs. unicorn on the two canary nodes
- Strategy for enabling puma one node at a time, can we do this with node overrides?
- Enable puma on canary