Class: Kitchen::Transport::Base::Connection

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/kitchen/transport/base.rb

Overview

A Connection instance can be generated and re-generated, given new connection details such as connection port, hostname, credentials, etc. This object is responsible for carrying out the actions on the remote host such as executing commands, transferring files, etc.

Author:

Instance Method Summary collapse

Methods included from Logging

#banner, #debug, #error, #fatal, #info, #warn

Constructor Details

#initialize(options = {}) {|self| ... } ⇒ Connection

Create a new Connection instance.

Parameters:

  • options (Hash) (defaults to: {}) —

    connection options

Yields:

  • (self) —

    yields itself for block-style invocation



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# File 'lib/kitchen/transport/base.rb', line 97

def initialize(options = {})
  init_options(options)

  yield self if block_given?
end

Instance Method Details

#close ⇒ Object

Closes the session connection, if it is still active.



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# File 'lib/kitchen/transport/base.rb', line 104

def close
  # this method may be left unimplemented if that is applicable
end

#download(remotes, local) ⇒ Object

Download remote files or directories to local host.

Parameters:

  • remotes (Array<String>) —

    paths to remote files or directories

  • local (String) —

    path to local destination. If ‘local` is an existing directory, `remote` will be downloaded into the directory using its original name

Raises:

  • (TransportFailed) —

    if the files could not all be downloaded successfully, which may vary by implementation



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# File 'lib/kitchen/transport/base.rb', line 180

def download(remotes, local) # rubocop:disable Lint/UnusedMethodArgument
  raise ClientError, "#{self.class}#download must be implemented"
end

#execute(command) ⇒ Object

Execute a command on the remote host.

Parameters:

  • command (String) —

    command string to execute

Raises:

  • (TransportFailed) —

    if the command does not exit successfully, which may vary by implementation



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# File 'lib/kitchen/transport/base.rb', line 113

def execute(command)
  raise ClientError, "#{self.class}#execute must be implemented"
end

#execute_with_retry(command, retryable_exit_codes = [], max_retries = 1, wait_time = 30) ⇒ Object

Execute a command on the remote host and retry

Parameters:

  • command (String) —

    command string to execute

  • retryable_exit_codes (Array) (defaults to: []) —

    Array of exit codes to retry against

  • max_retries (Fixnum) (defaults to: 1) —

    maximum number of retry attempts

  • wait_time (Fixnum) (defaults to: 30) —

    number of seconds to wait before retrying command

Raises:

  • (TransportFailed) —

    if the command does not exit successfully, which may vary by implementation



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# File 'lib/kitchen/transport/base.rb', line 125

def execute_with_retry(command, retryable_exit_codes = [], max_retries = 1, wait_time = 30)
  tries = 0
  begin
    tries += 1
    debug("Attempting to execute command - try #{tries} of #{max_retries}.")
    execute(command)
  rescue Exception => e
    if retry?(tries, max_retries, retryable_exit_codes, e)
      close
      sleep wait_time
      retry
    else
      raise e
    end
  end
end

#login_command ⇒ LoginCommand

Builds a LoginCommand which can be used to open an interactive session on the remote host.

Returns:

  • (LoginCommand) —

    an object containing the array of command line tokens and exec options to be used in a fork/exec

Raises:



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# File 'lib/kitchen/transport/base.rb', line 158

def 
  raise ActionFailed, "Remote login not supported in #{self.class}."
end

#retry?(current_try, max_retries, retryable_exit_codes, exception) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kitchen/transport/base.rb', line 142

def retry?(current_try, max_retries, retryable_exit_codes, exception)
  if exception.is_a?(Kitchen::Transport::TransportFailed)
    return current_try <= max_retries &&
        !retryable_exit_codes.nil? &&
        retryable_exit_codes.flatten.include?(exception.exit_code)
  end

  false
end

#upload(locals, remote) ⇒ Object

Uploads local files or directories to remote host.

Parameters:

  • locals (Array<String>) —

    paths to local files or directories

  • remote (String) —

    path to remote destination

Raises:

  • (TransportFailed) —

    if the files could not all be uploaded successfully, which may vary by implementation



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# File 'lib/kitchen/transport/base.rb', line 168

def upload(locals, remote) # rubocop:disable Lint/UnusedMethodArgument
  raise ClientError, "#{self.class}#upload must be implemented"
end

#wait_until_ready ⇒ Object

Block and return only when the remote host is prepared and ready to execute command and upload files. The semantics and details will vary by implementation, but a round trip through the hosted service is preferred to simply waiting on a socket to become available.



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# File 'lib/kitchen/transport/base.rb', line 189

def wait_until_ready
  # this method may be left unimplemented if that is applicable
end