Unicorn not reloading configuration

[joeyAghion]

We've observed this in production a few times: deploying (or applying the configure recipe) writes an updated config/application.yml file and the unicorn processes are restarted, but their environment doesn't reflect the updated values.

I suspect that this logic for "quick" restarts is responsible:

https://github.com/aws/opsworks-cookbooks/blob/f4525b09ad77848f7d3a37f15c489b02c534985b/unicorn/templates/default/unicorn.service.erb#L73

[joeyAghion]

The culprit ended up being this line, where only keys that aren't already set in the ENV are loaded from the application.yml:

https://github.com/laserlemon/figaro/blob/v0.7.0/lib/figaro/railtie.rb#L8

Luckily, this loading logic has been revamped for figaro 1.0. Upgrading fixed the issue.