Capistrano - Net::SSH::AuthenticationFailed - ruby-on-rails

Question

I can't figure out how to solve this problem. Capistrano didn't work correctly. So can't deploy my app.
Here's the error.
$ bundle exec cap staging deploy
(Backtrace restricted to imported tasks)
cap aborted!
Net::SSH::AuthenticationFailed: Authentication failed for user ec2-user#13.112.91.105
Here's config file, named config/deploy.rb
# config valid only for Capistrano 3.1
lock '3.5.0'
set :application, 'dola'
set :repo_url, 'git#ghe.intelligence-dev.com/inolab/eiicon-dola.git'
# Default branch is :master
# ask :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }.call
set :branch, 'master'
# Default deploy_to directory is /var/www/my_app
set :deploy_to, '/var/www/dola'
# Default value for keep_releases is 5
# set :keep_releases, 5
set :rbenv_type, :user
set :rbenv_ruby, '2.3.2-p217'
set :rbenv_map_bins, %w{rake gem bundle ruby rails}
set :rbenv_roles, :all
set :linked_dirs, %w{bin log tmp/backup tmp/pids tmp/cache tmp/sockets vendor/bundle}
role :web, %w{13.112.91.105}
namespace :deploy do
desc 'Restart application'
task :restart do
on roles(:app), in: :sequence, wait: 5 do
# Your restart mechanism here, for example:
# execute :touch, release_path.join('tmp/restart.txt')
end
end
after :publishing, :restart
after :restart, :clear_cache do
on roles(:web), in: :groups, limit: 3, wait: 10 do
# Here we can do anything such as:
# within release_path do
# execute :rake, 'cache:clear'
# end
end
end
end
And here's config/deploy/staging.rb
Simple Role Syntax
# ==================
# Supports bulk-adding hosts to roles, the primary server in each group
# is considered to be the first unless any hosts have the primary
# property set. Don't declare `role :all`, it's a meta role.
role :app, %w{ec2-user#13.112.91.105}
role :web, %w{ec2-user#13.112.91.105}
# Extended Server Syntax
# ======================
# This can be used to drop a more detailed server definition into the
# server list. The second argument is a, or duck-types, Hash and is
# used to set extended properties on the server.
server '13.112.91.105', user: 'ec2-user', roles: %w{web app}, my_property: :my_value
# Custom SSH Options
# ==================
set :stage, :staging
set :rails_env, 'staging'
server '13.112.91.105', user: 'ec2-user',
roles: %w{web app}
set :ssh_options, {
keys: [File.expand_path('~/.ssh/id_rsa_ec2.pem)')]
}
Anyone, please!

Answer 1

Capistrano is trying to establish an SSH session between your computer and the machine to which you are trying to deploy your application - 13.112.91.105 in this case. In order to do that, given your Capistrano configuration, you need to be able to authenticate to the SSH server that is running on 13.112.91.105 as the user ec2-user using your SSH private key, which I'm assuming is ~/.ssh/id_rsa_ec2.pem. For this to happen, your corresponding SSH public key must be listed in the authorized_keys file for ec2-user on the machine 13.112.91.105.