Capistrano deploy error while deploying to Ubuntu

Question

I was following this blog, to set up my rails server, and after I ran this command, I am getting the following error

cap production deploy:initial --trace


cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing on host 104.197.138.17: connection closed by remote host
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/runners/parallel.rb:16:in `rescue in block (2 levels) in execute'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'
Net::SSH::Disconnect: connection closed by remote host
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:50:in `rescue in block (2 levels) in negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:46:in `block (2 levels) in negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:45:in `loop'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:45:in `block in negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:43:in `loop'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:43:in `negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:32:in `initialize'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `new'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `block in initialize'
/home/vagrant/.rvm/rubies/ruby-2.1.7/lib/ruby/2.1.0/timeout.rb:75:in `timeout'
/home/vagrant/.rvm/rubies/ruby-2.1.7/lib/ruby/2.1.0/timeout.rb:126:in `timeout'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `initialize'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh.rb:207:in `new'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh.rb:207:in `start'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:50:in `call'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:50:in `create_new_entry'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:22:in `checkout'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:187:in `with_ssh'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:137:in `block in _execute'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:133:in `tap'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:133:in `_execute'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:62:in `test'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/capistrano-rvm-0.1.2/lib/capistrano/tasks/rvm.rake:21:in `block (3 levels) in <top (required)>'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:54:in `instance_exec'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:54:in `run'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/runners/parallel.rb:13:in `block (2 levels) in execute'
EOFError: end of file reached
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:47:in `readpartial'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:47:in `block (2 levels) in negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:45:in `loop'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:45:in `block in negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:43:in `loop'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:43:in `negotiate!'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/server_version.rb:32:in `initialize'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `new'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `block in initialize'
/home/vagrant/.rvm/rubies/ruby-2.1.7/lib/ruby/2.1.0/timeout.rb:75:in `timeout'
/home/vagrant/.rvm/rubies/ruby-2.1.7/lib/ruby/2.1.0/timeout.rb:126:in `timeout'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh/transport/session.rb:84:in `initialize'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh.rb:207:in `new'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/net-ssh-2.9.2/lib/net/ssh.rb:207:in `start'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:50:in `call'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:50:in `create_new_entry'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/connection_pool.rb:22:in `checkout'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:187:in `with_ssh'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:137:in `block in _execute'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:133:in `tap'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:133:in `_execute'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:62:in `test'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/capistrano-rvm-0.1.2/lib/capistrano/tasks/rvm.rake:21:in `block (3 levels) in <top (required)>'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:54:in `instance_exec'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/backends/netssh.rb:54:in `run'
/home/vagrant/.rvm/gems/ruby-2.1.7/gems/sshkit-1.7.1/lib/sshkit/runners/parallel.rb:13:in `block (2 levels) in execute'
Tasks: TOP => rvm:hook

Answer 1

It appears Capistrano can't connect to the server and is timing out, the most likely culprit is that it's not reading the SSH key correctly. The easiest way to test it would be to try creating an ssh config file:

nano ~/.ssh/config

Add:

Host 104.197.138.17
    HostName 104.197.138.17
    IdentityFile ~/.ssh/id_rsa

Try:

ssh deploy@104.197.138.17

Make sure it connects. (I'm assuming 104.197.138.17 is the IP of your server...)

If that works, try cap production deploy:check again.

--

What's happening here is the ssh config will feed the extra parameters to any SSH call to that Host (in this case the IP). You could change the Host to 'mysite.com' if you wanted and then you would run ssh [e-mail] if you wanted to create some separation. Digital Ocean has tutorial about it.

Answer 2

So in my deploy.rb file which is generated by Capistrano, I commented out this line. And it started to work.

set :ssh_options,{ forward_agent: true, user: fetch(:user), keys: %w(~/.ssh/id_rsa.pub) }