railsアプリをVPSにデプロイする時のエラーについて

railsアプリをconohaのVPSにデプロイしようとするとエラーが起きてしまいます。

** Invoke production (first_time)
** Execute production
** Invoke load:defaults (first_time)
** Execute load:defaults
** Invoke rbenv:validate (first_time)
** Execute rbenv:validate
#<Thread:0x00007fe38f973658@/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:10 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
	1: from /usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:15:in `rescue in block (2 levels) in execute': Exception while executing as root@  150.95.180.172: getaddrinfo: nodename nor servname provided, or not known (SSHKit::Runner::ExecuteError)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as root@  150.95.180.172: getaddrinfo: nodename nor servname provided, or not known
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:15:in `rescue in block (2 levels) in execute'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:11:in `block (2 levels) in execute'

Caused by:
SocketError: getaddrinfo: nodename nor servname provided, or not known
/usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/socket.rb:227:in `getaddrinfo'
/usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/socket.rb:227:in `foreach'
/usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/socket.rb:631:in `tcp'
/usr/local/lib/ruby/gems/2.5.0/gems/net-ssh-5.0.2/lib/net/ssh/transport/session.rb:73:in `initialize'
/usr/local/lib/ruby/gems/2.5.0/gems/net-ssh-5.0.2/lib/net/ssh.rb:242:in `new'
/usr/local/lib/ruby/gems/2.5.0/gems/net-ssh-5.0.2/lib/net/ssh.rb:242:in `start'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/connection_pool.rb:59:in `call'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/connection_pool.rb:59:in `with'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/netssh.rb:176:in `with_ssh'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/netssh.rb:129:in `execute_command'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:145:in `block in create_command_and_execute'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:145:in `tap'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:145:in `create_command_and_execute'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:59:in `test'
/usr/local/lib/ruby/gems/2.5.0/gems/capistrano-rbenv-2.1.4/lib/capistrano/tasks/rbenv.rake:10:in `block (3 levels) in <top (required)>'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:29:in `instance_exec'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/backends/abstract.rb:29:in `run'
/usr/local/lib/ruby/gems/2.5.0/gems/sshkit-1.17.0/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute'
Tasks: TOP => rbenv:validate