capistrano and ec2 and github - unable to deploy - github

Question

I am trying to deploy my first webapp to EC2 using capistrano and the repo is on github. But I am facing issues with "cap deploy:cold". The deploy.rb is pasted below. Following are the steps I followed.
1) Logged into ec2 instance using ssh from my local machine. Generated keys using ssh-keygen without any passphrase.
2) Took the contents of id_rsa.pub and copied to the github repo settings deploy keys.
3) Then from my local machine, ran "cap deploy:cold". I get the following error
user1#laptop:~/MyExample$ cap deploy:cold
* 2013-03-01 19:08:06 executing deploy:cold'
* 2013-03-01 19:08:06 executingdeploy:update'
** transaction: start
* 2013-03-01 19:08:06 executing `deploy:update_code'
updating the cached checkout on all servers
executing locally: "git ls-remote git#github.com:user1/MyExample.git HEAD"
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
* [deploy:update_code] rolling back
* executing "rm -rf /var/www/MyExample.com/releases/20130301133835; true"
servers: ["181.73.124.219"]
[181.73.124.219] executing command
command finished in 1186ms
set :application, "MyExample.com"
set :scm, "git"
set :repository, "git#github.com:thisuser/example.git"
default_run_options[:pty] = true
set :user, 'ubuntu'
set :use_sudo, true
set :deploy_to, "/var/www/#{application}"
set :deploy_via, :remote_cache
role :web, "181.73.124.219"
role :app, "181.73.124.219"
role :db, "181.73.124.219", :primary => true
after "deploy", "deploy:bundle_gems"
after "deploy:bundle_gems", "deploy:restart"
namespace :deploy do
task :bundle_gems do
run "cd #{deploy_to}/current && bundle install vandor/gems"
end
task :start do ; end
task :stop do ; end
task :restart, :roles => :app, :except => { :no_release => true } do
run "#{try_sudo} touch #{File.join(current_path,'tmp','restart.txt')}"
end
end
What am I missing here? Also any pointers to a URL/blog that can provide detailed steps would help.
Thanks.

Answer 1

I managed to get it working. As seen in the log,
executing locally: "git ls-remote git#github.com:user1/MyExample.git HEAD"
the capistrano is trying to run the above command local machine and not on the server. Running the above command on the terminal also returned the same error - Permission denied (Public Key).
So I had to copy the generated id_rsa and id_rsa.pub from the deploy server to the local machine. And after copying, add it to the ssk keys being used by running "ssh-add /path/to/keys".
After adding those keys, I was able to move ahead.