Module: Capistrano::ASG::Rolling::SSH

Defined in:
lib/capistrano/asg/rolling/ssh.rb

Overview

Test the SSHKit backend for availability.

Constant Summary collapse

WAIT_TIMEOUT = 
300

Class Method Summary collapse

Class Method Details

.available?(backend) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/capistrano/asg/rolling/ssh.rb', line 27

def available?(backend)
  backend.test('echo hello')

  true
rescue ::Net::SSH::AuthenticationFailed, ::Net::SSH::Authentication::DisallowedMethod
  # SSH server is reachable and responding.
  true
rescue ::Net::SSH::ConnectionTimeout, ::Net::SSH::Proxy::ConnectError, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ETIMEDOUT, Errno::ECONNRESET
  # SSH server not reachable or port closed.
  false
rescue ::Net::SSH::Disconnect # rubocop:disable Lint/DuplicateBranch
  # SSH server is reachable, but the connection dropped unexpectedly.
  false
end

.wait_for_availability(backend) ⇒ Object 



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# File 'lib/capistrano/asg/rolling/ssh.rb', line 14

def wait_for_availability(backend)
  timeout = WAIT_TIMEOUT
  expires_at = Time.now + timeout

  loop do
    break if available?(backend)

    raise SSHAvailabilityTimeoutError, timeout if Time.now > expires_at

    sleep 1
  end
end