皆さん、助けを求めています…
長年稼働しているUbuntu 20.x ec2上のDiscourseの根本原因を突き止めようと試行錯誤してきました。これらはすべてAWS上で稼働しており、約3年間問題なく動作していました。しかし、突然、どれも再構築できなくなりました。app.ymlを非常にシンプルな状態まで絞り込みましたが、延々と検索しても解決策が見つかりません。現在の私の環境は、Postgres 13、Discourse 2.9.0 Beta 4（常に最新の状態に保っています）で、非常に標準的なコンテナ/Dockerベースのインストールを使用しており、特別な設定（他のソフトウェアの別コンテナやスタンドアロンインストールなど）は行っていません。これは多くの推測の1つに過ぎませんが、最近Discourseのコードベースでauth/oauth2_authenticatorが「ManagedAuthenticator and UserAssociatedAccount」にリネーム/削除されたことに気づきました。
以下で確認できます：DEV: Deprecate OAuth2Authenticator and OAuth2UserInfo (#15427) · discourse/discourse@78d0ec3 · GitHub
リポジトリでのこのコミットに関するコメント：
DEV: OAuth2AuthenticatorとOAuth2UserInfoを非推奨にする (#15427)
これらはManagedAuthenticatorとUserAssociatedAccountに置き換えられました。詳細については、Adding a new 'managed' authentication method to Discourse を参照してください。
以下は、失敗直前のログです（はい、discourse-doctorも実行しましたが、ほぼ同じ結果でした… NGINXも実行していません。これが一般的な問題であることはよく目にしますが）。
I, [2022-05-17T21:26:52.663629 #1] INFO -- : > cd /var/www/discourse & su discourse -c 'LOAD_PLUGINS=0 bundle exec rake plugin:pull_compatible_all'
I, [2022-05-17T21:26:54.697333 #1] INFO -- : discourse-chat-integration is already at latest compatible version
discourse-rss-polling is already at latest compatible version
discourse-assign is already at latest compatible version
discourse-azure-ad is already at latest compatible version
discourse-solved is already at latest compatible version
discourse-knowledge-explorer is already at latest compatible version
docker_manager is already at latest compatible version
I, [2022-05-17T21:26:54.697677 #1] INFO -- : > cd /var/www/discourse & su discourse -c 'bundle exec rake db:migrate'
rake aborted!
LoadError: cannot load such file -- auth/oauth2_authenticator
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/bootsnap-1.11.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:15:in `require'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/bootsnap-1.11.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:15:in `require'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/zeitwerk-2.5.4/lib/zeitwerk/kernel.rb:35:in `require'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3/lib/active_support/dependencies/require_dependency.rb:21:in `require_dependency'
/var/www/discourse/lib/require_dependency_backward_compatibility.rb:18:in `require_dependency'
/var/www/discourse/plugins/discourse-azure-ad/plugin.rb:7:in `activate!'
/var/www/discourse/lib/plugin/instance.rb:679:in `instance_eval'
/var/www/discourse/lib/plugin/instance.rb:679:in `activate!'
/var/www/discourse/lib/discourse.rb:279:in `block in activate_plugins!'
/var/www/discourse/lib/discourse.rb:276:in `each'
/var/www/discourse/lib/discourse.rb:276:in `activate_plugins!'
/var/www/discourse/config/application.rb:222:in `block in <class:Application>'
/var/www/discourse/lib/plugin.rb:6:in `initialization_guard'
/var/www/discourse/config/application.rb:221:in `<class:Application>'
/var/www/discourse/config/application.rb:81:in `<module:Discourse>'
/var/www/discourse/config/application.rb:80:in `<top (required)>'
/var/www/discourse/Rakefile:7:in `require'
/var/www/discourse/Rakefile:7:in `<top (required)>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
/usr/local/bin/bundle:25:in `load'
/usr/local/bin/bundle:25:in `<main>'
(See full trace by running task with --trace)
I, [2022-05-17T21:26:55.807801 #1] INFO -- :
I, [2022-05-17T21:26:55.808466 #1] INFO -- : Terminating async processes
I, [2022-05-17T21:26:55.808709 #1] INFO -- : Sending INT to HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/13/bin/postmaster -D /etc/postgresql/13/main pid: 44
I, [2022-05-17T21:26:55.808935 #1] INFO -- : Sending TERM to exec chpst -u redis -U redis /usr/bin/redis-server /etc/redis/redis.conf pid: 105
2022-05-17 21:26:55.808 UTC [44] LOG: received fast shutdown request
105:signal-handler (1652822815) Received SIGTERM scheduling shutdown...
2022-05-17 21:26:55.810 UTC [44] LOG: aborting any active transactions
2022-05-17 21:26:55.815 UTC [44] LOG: background worker "logical replication launcher" (PID 53) exited with exit code 1
2022-05-17 21:26:55.816 UTC [48] LOG: shutting down
2022-05-17 21:26:55.851 UTC [44] LOG: database system is shut down
105:M 17 May 2022 21:26:55.894 # User requested shutdown...
105:M 17 May 2022 21:26:55.894 * Saving the final RDB snapshot before exiting.
105:M 17 May 2022 21:26:55.940 * DB saved on disk
105:M 17 May 2022 21:26:55.941 # Redis is now ready to exit, bye bye...
FAILED
--------------------
Pups::ExecError: cd /var/www/discourse & su discourse -c 'bundle exec rake db:migrate' failed with return #<Process::Status: pid 654 exit 1>
Location of failure: /usr/local/lib/ruby/gems/2.7.0/gems/pups-1.1.1/lib/pups/exec_command.rb:117:in `spawn'
exec failed with the params {"cd"=>"$home", "hook"=>"db_migrate", "cmd"=>["su discourse -c 'bundle exec rake db:migrate'"]}
bootstrap failed with exit code 1
** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one.
./discourse-doctor may help diagnose the problem.
c961e72970eba95a26f294e0f123987c40da1c350a4b1fe9621edf0bd665720c
まずは徹底的にテストする環境がたくさんあります。