NGNX, Passenger, Rails «Ресурс временно недоступен при подключении к восходящему потоку»

Question

Ruby 1.8.7, rails 3.0.1 Приложение работает отлично уже более года и не обновляется через неделю. Тем не менее, внезапно переход в приложение возвращает ошибку 503. Соединение с базой данных находится на другом Linode - это отлично работает, и я могу вручную подключиться к MySQL БД с сервера проблема, это то, что говорят журналы доступа Nginx:

2012/06/30 03:20:00 [error] 2277#0: *509 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:20:12 [error] 2277#0: *511 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:20:24 [error] 2277#0: *513 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:20:36 [error] 2277#0: *515 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:20:48 [error] 2277#0: *517 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:21:00 [error] 2277#0: *519 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:21:12 [error] 2277#0: *521 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:21:24 [error] 2277#0: *523 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 
2012/06/30 03:21:35 [error] 2277#0: *525 connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream, client: 192.168.255.12, server: disco, request: "GET/HTTP/1.1", upstream: "passenger:unix:/passenger_helper_server:", host: "*.*.*.*" 

Linode говорит, что все работает нормально на их конец - любые идеи, которые могли бы указать мне в правильном направлении?

Answer 1

ОК выглядит как там было отключение электричества Amazon, который снес нашу базу данных Redis:

http://www.theregister.co.uk/2012/06/30/amazon_cloud_storm_outage/