rails5+capistrano導入時によるSSHKit::Runner::ExecuteErrorを解決したい。

Question

追伸

現在は手動によるデプロイをしています。

cd /var/www/projects/【アプリ名】/ &&
kill -QUIT `cat tmp/pids/unicorn.pid` &&
git fetch origin master &&
git reset --hard origin/master &&
bundle install --path vendor/bundle  --without development test &&
bundle exec rake db:migrate RAILS_ENV=production &&
export AWS_ACCESS_KEY_ID=***************************** &&
export AWS_SECRET_ACCESS_KEY=************************* &&
bundle exec rake assets:precompile RAILS_ENV=production &&
bundle exec unicorn_rails -c /var/www/projects/【アプリ名】/config/unicorn.conf.rb -D -E production &&
ps -ef | grep unicorn | grep -v grep

かなり強引ですが...。

前提

参考資料	概要
デプロイ	初心者向け：AWS(EC2)にRailsのWebアプリをデプロイする方法
capistrano	(Capistrano編)世界一丁寧なAWS解説。EC2を利用して、RailsアプリをAWSにあげるまで
インフラ構成	ec2 / s3 / rds / nginx / unicorn

昨日からcapistranoを導入に挑戦していまして、現在は少し苦戦をしています。
お詳しい方いらっしゃったらご教授お願いできませんか。

下記のようなエラーが出ます。

capistrano導入に苦戦をしております。
詳しい方、ご教授頂けると幸いです。

 $ bundle exec cap production deploy

をすると下記のようなエラーが出ます。

(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as @XX.XXX.XXX.XX: bundle exit status: 1
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details

SSHKit::Command::Failed: bundle exit status: 1
bundle stdout: Nothing written
bundle stderr: master failed to start, check stderr log for details
/Users/【LOCAL_USERNAME】/Desktop/【APPNAME】/lib/capistrano/tasks/unicorn.rb:11:in `block in start_unicorn'
/Users/【LOCAL_USERNAME】/Desktop/【APPNAME】/lib/capistrano/tasks/unicorn.rb:10:in `start_unicorn'
/Users/【LOCAL_USERNAME】/Desktop/【APPNAME】/lib/capistrano/tasks/unicorn.rb:53:in `block (3 levels) in <top (required)>'
Tasks: TOP => unicorn:restart
(See full trace by running task with --trace)
The deploy has failed with an error: Exception while executing as 【SERVER_USERNAME】@XX.XXX.XXX.XX: 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 [b143da1e] Command: if test ! -d /var/www/projects/【APPNAME】/releases/20180119110958; then echo "Directory does not exist '/var/www/projects/【APPNAME】/releases/20180119110958'" 1>&2; false; fi

 DEBUG [b143da1e] Finished in 0.274 seconds with exit status 0 (successful).

  INFO [a64a49a9] Running $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [a64a49a9] Command: cd /var/www/projects/【APPNAME】/releases/20180119110958 && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.4.0" RAILS_ENV="production" ; $HOME/.rbenv/bin/rbenv exec bundle exec rake db:migrate )

  INFO [a64a49a9] Finished in 3.390 seconds with exit status 0 (successful).

  INFO [1659769c] Running /usr/bin/env ln -s /var/www/projects/【APPNAME】/releases/20180119110958 /var/www/projects/【APPNAME】/releases/current as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [1659769c] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.4.0" ; /usr/bin/env ln -s /var/www/projects/【APPNAME】/releases/20180119110958 /var/www/projects/【APPNAME】/releases/current )

  INFO [1659769c] Finished in 0.247 seconds with exit status 0 (successful).

  INFO [d2c6f9fc] Running /usr/bin/env mv /var/www/projects/【APPNAME】/releases/current /var/www/projects/【APPNAME】 as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [d2c6f9fc] Command: ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.4.0" ; /usr/bin/env mv /var/www/projects/【APPNAME】/releases/current /var/www/projects/【APPNAME】 )

  INFO [d2c6f9fc] Finished in 0.291 seconds with exit status 0 (successful).

 DEBUG [30f26ed1] Running [ -f /var/www/projects/【APPNAME】/current/tmp/pids/unicorn.pid ] as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [30f26ed1] Command: [ -f /var/www/projects/【APPNAME】/current/tmp/pids/unicorn.pid ]

 DEBUG [30f26ed1] Finished in 0.266 seconds with exit status 1 (failed).

 DEBUG [52b38bff] Running if test ! -d /var/www/projects/【APPNAME】/current; then echo "Directory does not exist '/var/www/projects/【APPNAME】/current'" 1>&2; false; fi as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [52b38bff] Command: if test ! -d /var/www/projects/【APPNAME】/current; then echo "Directory does not exist '/var/www/projects/【APPNAME】/current'" 1>&2; false; fi

 DEBUG [52b38bff] Finished in 0.261 seconds with exit status 0 (successful).

  INFO [5bab6ec5] Running $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/projects/【APPNAME】/current/config/unicorn/production.rb -E production -D as 【SERVER_USERNAME】@XX.XXX.XXX.XX

 DEBUG [5bab6ec5] Command: cd /var/www/projects/【APPNAME】/current && ( export RBENV_ROOT="$HOME/.rbenv" RBENV_VERSION="2.4.0" ; $HOME/.rbenv/bin/rbenv exec bundle exec unicorn -c /var/www/projects/【APPNAME】/current/config/unicorn/production.rb -E production -D )

 DEBUG [5bab6ec5] 	master failed to start, check stderr log for details

気がかり

unicornとnginxの設定の件

# 資料では【APPNAME】/currentが付与されるが、現在は付与せず。
$app_dir = "/var/www/projects/【APPNAME】"

IPアドレスの件

# IPアドレスをドメインにしたほうがいいかもしれない。
server 'XX.XXX.XX.XXX', user: '【USERNAME】', roles: %w{app db web}

# my-key.pemの指定が間違っているのかな。
set :ssh_options, keys: '~/.ssh/my-key.pem'

まとめ

資料を通して２点ほど気がかりな部分もありますが、それがエラーに関係あるのか、
はたまた別の理由でエラーが出ているのか、インフラの専門家の方、
capistranoを導入したことがある方、ご教授頂けると幸いです。

Answer 1

以下で指定してみて試してもらえますか？

set :ssh_options, {
  port: 22,
  forward_agent: true,
  keys: ['~/.ssh/my-key.pem']
}