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



86
87
88
89
90
 
# File 'lib/kitchen/transport/base.rb', line 86

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.



93
94
95
 
# File 'lib/kitchen/transport/base.rb', line 93

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



102
103
104
 
# File 'lib/kitchen/transport/base.rb', line 102

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



114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
 
# File 'lib/kitchen/transport/base.rb', line 114

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 Kitchen::Transport::TransportFailed => e
    if retry?(tries, max_retries, retryable_exit_codes, e.exit_code)
      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:



143
144
145
 
# File 'lib/kitchen/transport/base.rb', line 143

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

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

Returns:

  • (Boolean) 


131
132
133
134
135
 
# File 'lib/kitchen/transport/base.rb', line 131

def retry?(current_try, max_retries, retryable_exit_codes, exit_code)
  current_try <= max_retries &&
    !retryable_exit_codes.nil? &&
    retryable_exit_codes.include?(exit_code)
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



153
154
155
 
# File 'lib/kitchen/transport/base.rb', line 153

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.



162
163
164
 
# File 'lib/kitchen/transport/base.rb', line 162

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