How can I solve Permission denied on deploying app? - capistrano

Question

I have setup an app to deploy to my site that is hosted on Digital Ocean CentOS 6 server and I am using Capistrano to deploy the app from my development machine. I have got a repo setup that I push to and that my Capistrano config references when I do cap development deploy.
The issue I am having is that it throws this error:
[a7406f5e] Command: ( GIT_ASKPASS=/bin/echo GIT_SSH=/tmp/PopupHub/git-ssh.sh /usr/bin/env git ls-remote git#repo-url-is-here/popup-hub.git )
DEBUG [a7406f5e] Permission denied (publickey).
DEBUG [a7406f5e] fatal: The remote end hung up unexpectedly
In capfile I have got this:
# Load DSL and Setup Up Stages
require 'capistrano/setup'
# Includes default deployment tasks
require 'capistrano/deploy'
# Includes tasks from other gems included in your Gemfile
#
# For documentation on these, see for example:
#
# https://github.com/capistrano/rvm
# https://github.com/capistrano/rbenv
# https://github.com/capistrano/chruby
# https://github.com/capistrano/bundler
# https://github.com/capistrano/rails
#
# require 'capistrano/rvm'
# require 'capistrano/rbenv'
# require 'capistrano/chruby'
require 'capistrano/bundler'
require 'capistrano/rails/assets'
require 'capistrano/rails/migrations'
require 'capistrano/sitemap_generator'
# Loads custom tasks from `lib/capistrano/tasks' if you have any defined.
Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r }
In my config/deploy.rb I have:
lock '3.1.0'
server "0.0.0.0.0"
set :application, "NameOfApp"
set :scm, "git"
set :repo_url, "git#the-repo-url-is-here/popup-hub.git"
# set :scm_passphrase, ""
# set :user, "deploy"
# files we want symlinking to specific entries in shared.
set :linked_files, %w{config/database.yml}
# dirs we want symlinking to shared
set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}
SSHKit.config.command_map[:rake] = "bundle exec rake" #8
SSHKit.config.command_map[:rails] = "bundle exec rails"
set :branch, ENV["REVISION"] || ENV["BRANCH_NAME"] || "master"
set :keep_releases, 20
namespace :deploy do
desc 'Restart passenger without service interruption (keep requests in a queue while restarting)'
task :restart do
on roles(:app) do
execute :touch, release_path.join('tmp/restart.txt')
unless execute :curl, '-s -k --location localhost | grep "Pop" > /dev/null'
exit 1
end
end
end
after :finishing, "deploy:cleanup"
after :finishing, "deploy:sitemap:refresh"
end
after "deploy", "deploy:migrate"
after 'deploy:publishing', 'deploy:restart'
# deploy:sitemap:create #Create sitemaps without pinging search engines
# deploy:sitemap:refresh #Create sitemaps and ping search engines
# deploy:sitemap:clean #Clean up sitemaps in the sitemap path
# start new deploy.rb stuff for the beanstalk repo
Then in my config/development.rb I have got:
set :stage, :development
set :ssh_options, {
forward_agent: true,
password: 'thepassword',
user: 'deployer',
}
server "0.0.0.0", user: "deployer", roles: %w{web app db}
set :deploy_to, "/home/deployer/development"
set :rails_env, 'development' # If the environment differs from the stage name
set :branch, ENV["REVISION"] || ENV["BRANCH_NAME"] || "master"
When I push in bash cap development deploy the error further up happens.
Can anyone tell me why this is happening? I have carried out everything fine up to now and I have this setup on another Digital Ocean droplet.
Thanks,

Answer 1

I think you have not ssh access to your remote server using you local system's ssh keys.
If you don't have ssh keys on local system, generate:
ssh-keygen -t rsa
Upload your local keys to remote server:
cat ~/.ssh/id_rsa.pub | ssh user#hostname 'cat >> .ssh/authorized_keys'
Source: HowToGeek.com

Answer 2

You need to set up your SSH key in Digital Ocean