Add delayed stop puma plugin (#21)

Author: steve-sullivan

Gemfile

@@ -18,6 +18,7 @@ gem 'omniauth-rails_csrf_protection', '~> 1.0'
 gem 'pg', '~> 1.4'
 gem 'pg_search', '~> 2.3'
 gem 'puma', '~> 7.2'
+gem 'puma-plugin-delayed_stop', '~> 0.1.2'
 gem 'rack-cors'
 gem 'rails', '~> 8.0.5'
 gem 'ransack', '~> 4.2'

Gemfile.lock

@@ -253,6 +253,8 @@ GEM
     public_suffix (7.0.5)
     puma (7.2.0)
       nio4r (~> 2.0)
+    puma-plugin-delayed_stop (0.1.2)
+      puma (>= 5.0, < 8)
     racc (1.8.1)
     rack (3.2.5)
     rack-cors (2.0.2)
@@ -442,6 +444,7 @@ DEPENDENCIES
   pg (~> 1.4)
   pg_search (~> 2.3)
   puma (~> 7.2)
+  puma-plugin-delayed_stop (~> 0.1.2)
   rack-cors
   rails (~> 8.0.5)
   rails-controller-testing

config/puma.rb

@@ -41,3 +41,6 @@
 
 # Allow puma to be restarted by `bin/rails restart` command.
 plugin :tmp_restart
+
+# Adds a drain period during shutdown so swarm can elegantly remove it from the routing mesh
+plugin :delayed_stop

docker-compose.yml

@@ -9,6 +9,7 @@ services:
     environment:
       - SERVE_TEST_UI=${SERVE_TEST_UI:-true}
       - GALC_API_URL=${GALC_API_URL:-http://localhost:3000}
+      - PUMA_DELAYED_STOP_DRAIN_SECONDS=1
     init: true
     networks:
       default:
@@ -19,6 +20,8 @@ services:
     ports:
       - 3000:3000
     restart: always
+    stop_grace_period: 30s
+    stop_signal: SIGQUIT
 
   db:
     environment:
@@ -38,5 +41,3 @@ services:
 
 volumes:
   postgres_data: { }
-
-version: '3.8'