Docker 업데이트 후 다운됨

방금 Discourse 관리 영역에서 Docker를 업데이트하려고 했습니다. 오류가 발생했고 이제 사이트가 다운되었습니다. 최근에 사이트에 아무런 변경 사항을 하지 않았기 때문에 무슨 일이 있었는지 조금 혼란스럽습니다. 이런 상황에서 복구하는 가장 좋은 방법은 무엇인가요? 클라우드에 자동화된 Discourse 백업이 저장되어 있는데, 그냥 Discourse를 다시 설치하고 백업을 불러오면 되나요, 아니면 이 문제를 수정하는 더 쉬운 방법이 있나요?

Using message_bus 3.3.2
Using mini_racer 0.3.1
Using redis 4.2.2
Using sidekiq 6.1.2
Using mini_scheduler 0.12.2
Using mini_sql 0.3
Using mini_suffix 0.3.0
Using multi_json 1.15.0
Using multi_xml 0.6.0
Using mustache 1.1.1
Using nio4r 2.5.4
Using nokogumbo 2.0.2
Using oauth 0.5.4
Using oauth2 1.4.4
Using oj 3.10.14
Using omniauth 1.9.1
Using omniauth-oauth2 1.7.0
Using omniauth-facebook 7.0.0
Using omniauth-github 1.4.0
Using omniauth-google-oauth2 0.8.0
Using omniauth-instagram 1.3.0
Using omniauth-oauth 1.1.0
Using omniauth-twitter 1.4.0
Using sanitize 5.2.1
Using onebox 2.1.3
Using optimist 3.0.1
Using pg 1.2.3
Using pry 0.13.1
Using pry-byebug 3.9.0
Using pry-rails 0.3.9
Using puma 5.0.2
Using r2 0.2.7
Using rack-mini-profiler 2.1.0
Using rack-protection 2.1.0
Using rails_failover 0.5.7
Using rails_multisite 2.5.0
Using raindrops 0.19.1
Using rbtrace 0.4.14
Using rchardet 1.8.0
Using redis-namespace 1.8.0
Using rinku 2.0.6
Using rotp 6.2.0
Using rqrcode_core 0.1.2
Using rqrcode 1.1.2
Using rtlit 0.0.5
Using ruby-readability 0.7.0
Using rubyzip 2.3.0
Using sassc 2.0.1
Using sprockets-rails 3.2.2
Using tilt 2.0.10
Using sassc-rails 2.1.2
Using seed-fu 2.3.9
Using sshkey 2.0.0
Using stackprof 0.2.15
Using uglifier 4.2.0
Using unf_ext 0.0.7.7
Using unf 0.1.4
Using unicorn 5.7.0
Using webpush 1.0.0
Using xorcist 1.1.2
Bundle complete! 124 Gemfile dependencies, 161 gems now installed.
Gems in the groups test and development were not installed.
Bundled gems are installed into `./vendor/bundle`
$ bundle exec rake plugin:pull_compatible_all
discourse-locations is already at latest compatible version
discourse-ratings is already at latest compatible version
discourse-topic-previews is already at latest compatible version
discourse-affiliate is already at latest compatible version
discourse-adplugin is already at latest compatible version
discourse-akismet is already at latest compatible version
discourse-subscriptions is already at latest compatible version
discourse-sitemap is already at latest compatible version
docker_manager is already at latest compatible version
$ SKIP_POST_DEPLOYMENT_MIGRATIONS=1 bundle exec rake multisite:migrate
Multisite migrator is running using 1 threads

Migrating default
Seeding default
*** Bundling assets. This will take a while *** 
$ RUBY_GC_MALLOC_LIMIT_MAX=20971520 RUBY_GC_OLDMALLOC_LIMIT_MAX=20971520 RUBY_GC_HEAP_GROWTH_MAX_SLOTS=50000 RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=0.9  bundle exec rake assets:precompile
Purging temp files
Bundling assets
I, [2020-11-06T00:16:24.441035 #2323256]  INFO -- : Writing /var/www/discourse/public/assets/locales/ro-eca9e9f1db0dabc6cc21151ac965087420e53357ffe195d0ce0857f74e4c59b3.js
Killed
Docker Manager: FAILED TO UPGRADE
#<RuntimeError: RuntimeError>
/var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:178:in `run'
/var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:86:in `upgrade'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:95:in `block in upgrade'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:91:in `fork'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:91:in `upgrade'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/base.rb:195:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/callbacks.rb:135:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications.rb:180:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications.rb:180:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.3.3/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/base.rb:136:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionview-6.0.3.3/lib/action_view/rendering.rb:39:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.1.0/lib/mini_profiler/profiling_methods.rb:78:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal.rb:190:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal.rb:254:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:33:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:18:in `block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:49:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/engine.rb:527:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:49:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/conditional_get.rb:40:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:336:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/session/abstract/id.rb:266:in `context'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/session/abstract/id.rb:260:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/cookies.rb:648:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/callbacks.rb:101:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.9.4/lib/logster/middleware/reporter.rb:43:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/rack/logger.rb:37:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:23:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/method_override.rb:24:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/sendfile.rb:110:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/host_authorization.rb:76:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.1.0/lib/mini_profiler/profiler.rb:235:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-3.3.2/lib/message_bus/rack/middleware.rb:61:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:176:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/engine.rb:527:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:74:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:632:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:728:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:144:in `start'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'
Spinning up 1 Unicorn worker(s) that were stopped initially
********************************************************
*** Please be patient, next steps might take a while ***
********************************************************
ABORTING, you do not have enough unicorn workers running
Docker Manager: FAILED TO UPGRADE
#<RuntimeError: Not enough workers>
/var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:40:in `upgrade'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:95:in `block in upgrade'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:91:in `fork'
/var/www/discourse/plugins/docker_manager/app/controllers/docker_manager/admin_controller.rb:91:in `upgrade'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/base.rb:195:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/rendering.rb:30:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/callbacks.rb:42:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/callbacks.rb:135:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/callbacks.rb:41:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/rescue.rb:22:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/instrumentation.rb:33:in `block in process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications.rb:180:in `block in instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications/instrumenter.rb:24:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/notifications.rb:180:in `instrument'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/instrumentation.rb:32:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal/params_wrapper.rb:245:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activerecord-6.0.3.3/lib/active_record/railties/controller_runtime.rb:27:in `process_action'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/abstract_controller/base.rb:136:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionview-6.0.3.3/lib/action_view/rendering.rb:39:in `process'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.1.0/lib/mini_profiler/profiling_methods.rb:78:in `block in profile_method'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal.rb:190:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_controller/metal.rb:254:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:33:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:18:in `block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:49:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/engine.rb:527:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/mapper.rb:48:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:49:in `block in serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/journey/router.rb:32:in `serve'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/routing/route_set.rb:834:in `call'
/var/www/discourse/lib/middleware/omniauth_bypass_middleware.rb:68:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/tempfile_reaper.rb:15:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/conditional_get.rb:40:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/head.rb:12:in `call'
/var/www/discourse/lib/content_security_policy/middleware.rb:12:in `call'
/var/www/discourse/lib/middleware/anonymous_cache.rb:336:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/session/abstract/id.rb:266:in `context'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/session/abstract/id.rb:260:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/cookies.rb:648:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.3.3/lib/active_support/callbacks.rb:101:in `run_callbacks'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/callbacks.rb:26:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/actionable_exceptions.rb:17:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/logster-2.9.4/lib/logster/middleware/reporter.rb:43:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/rack/logger.rb:37:in `call_app'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/rack/logger.rb:28:in `call'
/var/www/discourse/config/initializers/100-quiet_logger.rb:23:in `call'
/var/www/discourse/config/initializers/100-silence_logger.rb:31:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/var/www/discourse/lib/middleware/enforce_hostname.rb:22:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/method_override.rb:24:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/sendfile.rb:110:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/actionpack-6.0.3.3/lib/action_dispatch/middleware/host_authorization.rb:76:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-mini-profiler-2.1.0/lib/mini_profiler/profiler.rb:235:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/message_bus-3.3.2/lib/message_bus/rack/middleware.rb:61:in `call'
/var/www/discourse/lib/middleware/request_tracker.rb:176:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/engine.rb:527:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `public_send'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/railties-6.0.3.3/lib/rails/railtie.rb:190:in `method_missing'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:74:in `block in call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `each'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/rack-2.2.3/lib/rack/urlmap.rb:58:in `call'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:632:in `process_client'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:728:in `worker_loop'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:548:in `spawn_missing_workers'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:562:in `maintain_worker_count'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/lib/unicorn/http_server.rb:295:in `join'
/var/www/discourse/vendor/bundle/ruby/2.6.0/gems/unicorn-5.7.0/bin/unicorn:128:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `load'
/var/www/discourse/vendor/bundle/ruby/2.6.0/bin/unicorn:23:in `<main>'

여기서 메모리가 부족했던 것 같습니다. 인스턴스 크기를 키거나 스왑 공간을 추가해 보세요.

우선 콘솔에서 업그레이드를 시도해 보세요:

최근 Docker Manager의 포킹 관련 변경 사항으로 인해 메모리 부족으로 인해 프로세스가 종료되는(“killed”) 지원 문제가 여러 건 발생하고 있습니다. @sam, 이 문제를 어떻게 처리할 계획이신가요?

아, 그걸 생각해야 했는데. 방금 재빌드했는데 사이트가 다시 돌아왔어요. 감사합니다!

cd /var/discourse
./launcher rebuild app

그럴 수도 있지만, 이전에는 그런 문제가 없었어요. 이 사이트를 1024MB 메모리로 1년 넘게 운영해 왔거든요.

dmesg를 확인하여 oom-killer가 실행되었는지 살펴보세요. 그러면 확실하게 알 수 있습니다.

새로운 업그레이드 동작을 환경 변수로 제어하도록 하면 어떨까요? ./discourse-setup가 RAM 3GB가 넘는 시스템에서 해당 변수를 설정하도록 하는 방식입니다.

templates/web.template.yml:
env:
  DISCOURSE_GRACEFUL_UPGRADE: false

containers/app.yml:
env:
  # RAM이 3GB 이상인 시스템에서는 true로 설정하세요.
  DISCOURSE_GRACEFUL_UPGRADE: false