[AWS]自動デプロイエラー SSHKit::Runner::ExecuteError

Question

Capistranoで自動デプロイコマンド実行中に以下のようなエラーが表示されました。

unicorn:start
      01 $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/aaaa/current/config/unicorn.rb -E deployment -D 
      01 master failed to start, check stderr log for details
raceback (most recent call last):
        1: from /Users/ユーザ/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'
/Users/ユーザ名/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/sshkit-1.21.0/lib/sshkit/runners/parallel.rb:15:in `rescue in block (2 levels) in execute': Exception while executing as ec2-user@Elasticip番号: 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 ec2-user@Elasticip番号: 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 ec2-user@Elasticip番号: 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 [29071733] Finished in 0.090 seconds with exit status 0 (successful).

  INFO [d932a065] Running $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate as ec2-user@Elasticip番号

 DEBUG [d932a065] Command: cd /var/www/aaaa/releases/20200823130418 && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.5.8" RAILS_ENV="production" ; $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate )

  INFO [d932a065] Finished in 1.997 seconds with exit status 0 (successful).

  INFO [470b4d91] Running /usr/bin/env ln -s /var/www/aaaa/releases/20200823130418 /var/www/aaaa/releases/current as ec2-user@Elasticip番号:

 DEBUG [470b4d91] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.5.8" ; /usr/bin/env ln -s /var/www/aaaa/releases/20200823130418 /var/www/aaaa/releases/current )

  INFO [470b4d91] Finished in 0.115 seconds with exit status 0 (successful).

  INFO [b553c215] Running /usr/bin/env mv /var/www/aaaa/releases/current /var/www/aaaa as ec2-user@Elasticip番号:

 DEBUG [b553c215] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.5.8" ; /usr/bin/env mv /var/www/aaaa/releases/current /var/www/aaaa )

  INFO [b553c215] Finished in 0.118 seconds with exit status 0 (successful).

 DEBUG [4b04f1eb] Running if test ! -d /var/www/aaaa/current; then echo "Directory does not exist '/var/www/aaaa/current'" 1>&2; false; fi as ec2-user@Elasticip番号

 DEBUG [4b04f1eb] Command: if test ! -d /var/www/aaaa/current; then echo "Directory does not exist '/var/www/aaaa/current'" 1>&2; false; fi

 DEBUG [4b04f1eb] Finished in 0.095 seconds with exit status 0 (successful).

 DEBUG [18f80244] Running [ -e /var/www/aaaa/shared/tmp/pids/unicorn.pid ] && kill -0 `cat /var/www/aaaa/shared/tmp/pids/unicorn.pid` as ec2-user@Elasticip番号

 DEBUG [18f80244] Command: [ -e /var/www/aaaa/shared/tmp/pids/unicorn.pid ] && kill -0 `cat /var/www/aaaa/shared/tmp/pids/unicorn.pid`

 DEBUG [18f80244]       bash: 0 行: kill: (18514) - そのようなプロセスはありません

 DEBUG [18f80244] Finished in 0.100 seconds with exit status 1 (failed).

  INFO [c49dc855] Running $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/aaaa/current/config/unicorn.rb -E deployment -D  as ec2-user@Elasticip番号:

 DEBUG [c49dc855] Command: cd /var/www/aaaa/current && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.5.8" RAILS_ENV="production" ; $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/aaaa/current/config/unicorn.rb -E deployment -D  )

 DEBUG [c49dc855]       master failed to start, check stderr log for details

app_path = File.expand_path('../../../', __FILE__)


worker_processes 1
# currentを指定
working_directory "#{app_path}/current"

# それぞれ、sharedの中を参照するよう変更

pid "#{app_path}/shared/tmp/pids/unicorn.pid"

listen "#{app_path}/shared/tmp/sockets/unicorn.sock"

stderr_path "#{app_path}/shared/log/unicorn.stderr.log"

stdout_path "#{app_path}/shared/log/unicorn.stdout.log"
#Railsアプリケーションの応答を待つ上限時間を設定
timeout 60

#以下は応用的な設定なので説明は割愛

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 # prevent from firing again
  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

unicornの起動でエラーが起きているように見えます。
原因わかる方いませんでしょうか？

Answer 1

私の方でも同じようなUnicorn起動時の問題が発生しました。

結果的には、unicornのgemべ―ジョンに問題があるようです。
使用しているRubyおよびrailsバージョンは以下のようになっています。
Rubyバージョン、3.1.1
Railsバージョン 6.1.4
bundlerバージョン2.3.7

unicornのバージョンは、最初6.0.0になっていました。
そこで、以下の記事を参考にさせていただき、unicornのバージョンを5.8.0 に変更したところ、問題解決しました。

https://qiita.com/chimeiwang/items/e6cef67d8e33ab0ff8d3

Answer 2

check stderr log for details

書いてあるとおり、情報を得るためにエラーログを確認してください。
おそらくlogディレクトリ配下にあるでしょう。