SSHKit::Runner::ExecuteError【AWS,Capistrano】

はじめに

Capistranoを使用して、AWSに自動デプロイを行なった際に下記のエラーが出たので、備忘録として投稿します。

エラー内容

$  bundle exec cap production deploy

で自動デプロイを始めると

SHKit::Runner::ExecuteError: Exception while executing as ec2-user@Elastic IP: rake exit status: 1
rake stdout: Nothing written
rake stderr: bundler: failed to load command: rake (/var/www/app/shared/bundle/ruby/2.6.0/bin/rake)
Gem::Exception: can't find executable rake for gem rake. rake is not currently included in the bundle, perhaps you meant to add it to your Gemfile?
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:374:in `block in replace_bin_path'
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:402:in `block in replace_bin_path'
  /var/www/app/shared/bundle/ruby/2.6.0/bin/rake:23:in `<top (required)>'


Caused by:
SSHKit::Command::Failed: rake exit status: 1
rake stdout: Nothing written
rake stderr: bundler: failed to load command: rake (/var/www/app/shared/bundle/ruby/2.6.0/bin/rake)
Gem::Exception: can't find executable rake for gem rake. rake is not currently included in the bundle, perhaps you meant to add it to your Gemfile?
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:374:in `block in replace_bin_path'
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:402:in `block in replace_bin_path'
  /var/www/app/shared/bundle/ruby/2.6.0/bin/rake:23:in `<top (required)>'

Tasks: TOP => deploy:assets:precompile
(See full trace by running task with --trace)
The deploy has failed with an error: Exception while executing as ec2-user@Elastic IP: rake exit status: 1
rake stdout: Nothing written
rake stderr: bundler: failed to load command: rake (/var/www/app/shared/bundle/ruby/2.6.0/bin/rake)
Gem::Exception: can't find executable rake for gem rake. rake is not currently included in the bundle, perhaps you meant to add it to your Gemfile?
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:374:in `block in replace_bin_path'
  /home/ec2-user/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/bundler-2.1.4/lib/bundler/rubygems_integration.rb:402:in `block in replace_bin_path'
  /var/www/app/shared/bundle/ruby/2.6.0/bin/rake:23:in `<top (required)>'


** DEPLOY FAILED

というエラーが出てしまい、GEMのバージョンが古いのかと思い、ローカル環境で

gem update --system

bundle update rake

などを試したのですが解決せず。

その後EC2の環境がおかしいのではと考え、

EC2のbundlerのバージョンをローカルと揃えてから
再度試したところ解決。

原因はローカルでバージョンを変更したのに、EC2は変更していなかったことでした。

原因を決めつけず、色々探ることが大切だと学べました。