「bundle exec cap production deploy」にて「unicorn:start」中のプロセスのkillが成功しません。

Question

前提・実現したいこと

現在、ruby on rails で開発したアプリを、capistoranoを使ってEC2インスタンスにデプロイをこころみているところです。

そこで、unicorn:startの中の、プロセスをkillする処理が失敗してしまい困っています。

発生している問題・エラーメッセージ

###中略（bundle exec cap production deploy実行中）

01:31 unicorn:start
      01 $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/app/current/config/u…
      01 master failed to start, check stderr log for details
#<Thread:0x00007f937a839d10@/Users/user/rails6-compose/apps/app/vendor/bundle/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:10 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
	13: from /Users/user/rails6-compose/apps/app/vendor/bundle/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'

###中略

/Users/user/rails6-compose/apps/app/vendor/bundle/gems/sshkit-1.21.0/lib/sshkit/command.rb:97:in `exit_status=': bundle exit status: 1 (SSHKit::Command::Failed)
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details
	1: from /Users/user/rails6-compose/apps/app/vendor/bundle/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'
/Users/user/rails6-compose/apps/app/vendor/bundle/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:15:in `rescue in block (2 levels) in execute': Exception while executing as [e-mail]: bundle exit status: 1 (SSHKit::Runner::ExecuteError)
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as [e-mail]: bundle exit status: 1
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details


Caused by:
SSHKit::Command::Failed: bundle exit status: 1
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details

Tasks: TOP => unicorn:start
(See full trace by running task with --trace)
The deploy has failed with an error: Exception while executing as [e-mail]: bundle exit status: 1
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details


** DEPLOY FAILED
** Refer to log/capistrano.log for details. Here are the last 20 lines:


 DEBUG [8689ce8d] Command: if test ! -d /var/www/app/releases/20200721052338; then echo "Directory does not exist '/var/www/app/releases/20200721052338'" 1>&2; false; fi

 DEBUG [8689ce8d] Finished in 0.614 seconds with exit status 0 (successful).

  INFO [7cb59359] Running $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate as [e-mail]

 DEBUG [7cb59359] Command: cd /var/www/app/releases/20200721052338 && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.6.4" RAILS_ENV="production" ; $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate )

  INFO [7cb59359] Finished in 1.928 seconds with exit status 0 (successful).

  INFO [5aa6de05] Running /usr/bin/env ln -s /var/www/app/releases/20200721052338 /var/www/app/releases/current as [e-mail]

 DEBUG [5aa6de05] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.6.4" ; /usr/bin/env ln -s /var/www/app/releases/20200721052338 /var/www/app/releases/current )

  INFO [5aa6de05] Finished in 0.683 seconds with exit status 0 (successful).

  INFO [d925d361] Running /usr/bin/env mv /var/www/app/releases/current /var/www/app as [e-mail]

 DEBUG [d925d361] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.6.4" ; /usr/bin/env mv /var/www/app/releases/current /var/www/app )

  INFO [d925d361] Finished in 0.711 seconds with exit status 0 (successful).

 DEBUG [d4a27ef4] Running if test ! -d /var/www/app/current; then echo "Directory does not exist '/var/www/app/current'" 1>&2; false; fi as [e-mail]

 DEBUG [d4a27ef4] Command: if test ! -d /var/www/app/current; then echo "Directory does not exist '/var/www/app/current'" 1>&2; false; fi

 DEBUG [d4a27ef4] Finished in 0.613 seconds with exit status 0 (successful).

###ここで、プロセスのkillに失敗します。

 DEBUG [fda06aef] Running [ -e /var/www/app/shared/tmp/pids/unicorn.pid ] && kill -0 `cat /var/www/app/shared/tmp/pids/unicorn.pid` as [e-mail]

 DEBUG [fda06aef] Command: [ -e /var/www/app/shared/tmp/pids/unicorn.pid ] && kill -0 `cat /var/www/app/shared/tmp/pids/unicorn.pid`

 DEBUG [fda06aef] Finished in 0.636 seconds with exit status 1 (failed).

  INFO [f48744c2] Running $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/app/current/config/unicorn.rb -E deployment -D  as [e-mail]

 DEBUG [f48744c2] Command: cd /var/www/app/current && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.6.4" RAILS_ENV="production" ; $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/app/current/config/unicorn.rb -E deployment -D  )

 DEBUG [f48744c2] 	master failed to start, check stderr log for details

設定ファイル

deploy.rb

lock '3.14.1'
set :application, 'app'
set :repo_url,  '[e-mail]:XXXXXX/app.git'
set :linked_dirs, fetch(:linked_dirs, []).push('log', 'tmp/pids', 'tmp/cache', 'tmp/sockets', 'vendor/bundle', 'public/system', 'public/uploads')
set :rbenv_type, :user
set :rbenv_ruby, '2.6.4'
set :ssh_options, auth_methods: ['publickey'], keys: ['~/.ssh/my-key.pem']
set :unicorn_pid, -> { "#{shared_path}/tmp/pids/unicorn.pid" }
set :unicorn_config_path, -> { "#{current_path}/config/unicorn.rb" }
set :keep_releases, 5
set :linked_files, fetch(:linked_files, []).push("config/master.key")

after 'deploy:publishing', 'deploy:restart'
namespace :deploy do
  task :restart do
    invoke 'unicorn:restart'
  end
end

unicorn.rb

app_path = File.expand_path('../../../', __FILE__)
worker_processes 1
working_directory "#{app_path}/current"
listen "#{app_path}/shared/tmp/sockets/unicorn.sock"
pid "#{app_path}/shared/tmp/pids/unicorn.pid"
stderr_path "#{app_path}/shared/log/unicorn.stderr.log"
stdout_path "#{app_path}/shared/log/unicorn.stdout.log"
timeout 60
preload_app true
GC.respond_to?(:copy_on_write_friendly=) && GC.copy_on_write_friendly = true
check_client_connection false
run_once = true
before_fork do |server, worker|
  defined?(ActiveRecord::Base) &&
    ActiveRecord::Base.connection.disconnect!
  if run_once
    run_once = false
  end
  old_pid = "#{server.config[:pid]}.oldbin"
  if File.exist?(old_pid) && server.pid != old_pid
    begin
      sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
      Process.kill(sig, File.read(old_pid).to_i)
    rescue Errno::ENOENT, Errno::ESRCH => e
      logger.error e
    end
  end
end
after_fork do |_server, _worker|
  defined?(ActiveRecord::Base) && ActiveRecord::Base.establish_connection
end

試したこと

・いろいろ記事を調べたところ、unicorn.pidを削除すると成功するとありましたが失敗しました。

・pidsのディレクトリの権限を、誰でも書き込み・読み込みできるよう権限を777にしましたが失敗しました。

・working_directory "#{app_path}/current"

となっており、このディレクトリに移動した上で、

$HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/app/current/config//unicorn.rb

を押下したところ、

[ec2-user@ip-XXX-XX-XX-XX current]$ ls /var/www/app/shared/tmp/pids/unicorn.pid 
/var/www/app/shared/tmp/pids/unicorn.pid

と、ファイルの生成はうまく行くようです。
ですが、プロセスは動いてないみたいです。

$ ps aux | grep unicorn |grep  -v grep
$ 

仮説としては、unicorn.pidファイルの生成はできたけど
何らかの理由で、プロセスがすぐに落ちてしまうのかと思いますが
解決策がわかりません。

ご教授お願い致します。

補足情報（FW/ツールのバージョンなど）

参考情報

【初心者向け】WEBプログラミング学習完全ロードマップ【MacBook購入から実務レベルまで】
【保存版】AWSのアカウント登録からRails自動デプロイまでの全手順【Capistrano】

Comments

[winterboum]

unicornのlogがありませんか？
"#{app_path}/shared/log/unicorn.stderr.log"
これ見ましたか？

[tomo_z]

ご指摘の通り、/unicorn.stderr.logを調べることによって原因を特定できました。
ありがとうございました

[winterboum]

よござんした

Answer 1

"#{app_path}/shared/log/unicorn.stderr.log"をチェック。
すると、Zeitwerk::NameError: expected file /var/www/app/releases/20200721070432/app/forms/admin/app_user_form.rb to define constant Admin::AppUserForm

との記載があり、そこが怪しいとみてみる。
何故だか、該当ファイルが全てコメントアウトされていたことが原因でした。
そこのファイルのコメントアウトを解除することで解決致しました。