deploy

config/deploy.rb

@@ -18,5 +18,5 @@ set :default_env, {
   web_concurrency: '1'
 }
 
-after 'deploy:published', 'puma:stop'
-after 'puma:stop', 'puma:start'
+after 'deploy:published', 'pumx:stop'
+after 'pumx:stop', 'pumx:start'

config/puma.rb

@@ -35,4 +35,4 @@ preload_app!
 
 # Allow puma to be restarted by `rails restart` command.
 plugin :tmp_restart
-pidfile 'tmp/puma.pid'
+pidfile 'tmp/pids/puma.pid'

lib/capistrano/tasks/pumx.rake

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-namespace :pumo do
+namespace :pumx do
   desc 'Start puma'
   task :start do
     on roles(:web) do
@@ -14,7 +14,8 @@ namespace :pumo do
   task :stop do
     on roles(:web) do
       within current_path do
-        execute "cat #{current_path}/tmp/puma.pid | xargs kill"
+        pid = "#{current_path}/tmp/pids/puma.pid"
+        execute "test -f '#{pid}' && cat '#{pid}' | xargs kill"
       end
     end
   end