Capistrano cannot deploy code, because Net::SSH::AuthenticationFailed: Authentication failed

Question

We have a Rails app that is running on Amazon AWS. We're pushing there a new code almost every day for a few months in a row.

Today, when I tried to deploy a new code there, I was given this error message:

  * 2014-02-16 13:09:51 executing `deploy'
  * 2014-02-16 13:09:51 executing `deploy:update'
 ** transaction: start
  * 2014-02-16 13:09:51 executing `deploy:update_code'
    updating the cached checkout on all servers
    executing locally: "git ls-remote [email protected]:my_bitbucket_name/project_name.git master"
    command finished in 2909ms
  * executing "if [ -d /home/deployer/project_name/shared/cached-copy ]; then cd /home/deployer/project_name/shared/cached-copy && git fetch -q origin && git fetch --tags -q origin && git reset -q --hard 16958dfcee27dd9c33855ecece0013428e2c57c8 && git clean -q -d -x -f; else git clone -q -b master [email protected]:rdudacz/looky.co.git /home/deployer/looky/shared/cached-copy && cd /home/deployer/project_name/shared/cached-copy && git checkout -q -b deploy 16958dfcee27dd9c33855ecece0013428e2c57c8; fi"
    servers: ["IP"]
*** [deploy:update_code] rolling back
  * executing "rm -rf /home/deployer/project_name/releases/20140216120957; true"
    servers: ["IP"]
 ** [deploy:update_code] exception while rolling back: Capistrano::ConnectionError, connection failed for: IP (Net::SSH::AuthenticationFailed: Authentication failed for user deployer@IP)
connection failed for: IP (Net::SSH::AuthenticationFailed: Authentication failed for user deployer@IP)

What happened here? Where to start with looking for the issue?

user984621 · Accepted Answer · 2014-02-16 13:06:10Z

23

The problem is the gem

net-ssh

The last version (2.8.0) causes this issue. The solution is to uninstall it:

gem uninstall net-ssh -v 2.8.0

and then to add to the Gemfile its previous version:

gem "net-ssh", "~> 2.7.0"

That's it.

answered Feb 16, 2014 at 13:06

user984621

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4 Comments

Michael Over a year ago

I am Using net-ssh 2.7.0 and passwordless login is working fine, but still getting Net::SSH::AuthenticationFailed

Constant Meiring Over a year ago

Thanks you! It seems that 2.9 also has an issue where it can't connect to the server via port 22, while using ssh works fine. Reverting to 2.7 works!

aqingsao Over a year ago

I'm using ruby-2.1.2p95, after installing net-ssh 2.7.0, I got this error: **/ruby-2.1.2/lib/ruby/2.1.0/rubygems/dependency.rb:298:in `to_specs': Could not find 'net-ssh' (>= 2.8.0) - did find: [net-ssh-2.7.0] (Gem::LoadError)

Kevin Nguyen Over a year ago

I am using net-ssh 2.7.0 and got the same issue

Anbazhagan p · Accepted Answer · 2014-04-30 10:50:10Z

10

I had the same problem while deploying using capistrano Net::SSH::AuthenticationFailed: Authentication failed for user deployer@IP

ssh-copy-id deployer@ip

This will add your keys to server and you can login without password.

answered Apr 30, 2014 at 10:50

Anbazhagan p

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Comments

user1320189 · Accepted Answer · 2014-02-25 15:07:53Z

0

After uninstall net-ssh 2.8.0, remove on gemfile.lock, too. It will continuously okay.

answered Feb 25, 2014 at 15:07

user1320189

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Comments

Rameshwar Vyevhare · Accepted Answer · 2015-05-30 17:59:27Z

0

Please remove old net-ssh and install updated as below, add this in your gem file or can install it on your environment specifying 2.9.2 version.

gem 'net-ssh', '~> 2.9.2'

Its works for me.

answered May 30, 2015 at 17:59

Rameshwar Vyevhare

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Comments

Artyom Kalmykov · Accepted Answer · 2015-10-26 06:12:23Z

0

For capistrano2 in your deploy.rb

net-ssh 2.9.1 set :ssh_options, { config: false}
net-ssh 2.9.2 set :ssh_options, { config: false, number_of_password_prompts: 0 }

answered Oct 26, 2015 at 6:12

Artyom Kalmykov

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