Class: Rancher::Shell::Commands::Exec

Inherits:
Object
  • Object
show all
Includes:
LoggerHelper
Defined in:
lib/rancher/shell/commands/exec.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from LoggerHelper

#exit_with_error, #logger

Constructor Details

#initialize ⇒ Exec

Returns a new instance of Exec.



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# File 'lib/rancher/shell/commands/exec.rb', line 13

def initialize
  @config = Config.get_all
  logger.debug "config = #{@config}"
  exit_with_error "Project not found: #{@config['project']}" unless @config['project']
  exit_with_error "Command not specified" unless @config['options']['command'] && @config['options']['command'] != ''
  exit_with_error "Container not specified" unless @config['options']['container'] && @config['options']['container'] != ''
  exit_with_error "API Host Required" unless @config['project']['api'] && @config['project']['api']['host']
  exit_with_error "API Key Required" unless @config['project']['api'] && @config['project']['api']['key']
  exit_with_error "API Secret Required" unless @config['project']['api'] && @config['project']['api']['secret']
end

Instance Attribute Details

#api ⇒ Object (readonly)

Returns the value of attribute api.



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# File 'lib/rancher/shell/commands/exec.rb', line 11

def api
  @api
end

#websocket ⇒ Object (readonly)

Returns the value of attribute websocket.



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# File 'lib/rancher/shell/commands/exec.rb', line 11

def websocket
  @websocket
end

Instance Method Details

#listen! ⇒ Object 



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# File 'lib/rancher/shell/commands/exec.rb', line 24

def listen!
  begin
    logger.info "listening"
    system("stty raw")
    while input = STDIN.getc
      @websocket.send Base64.encode64 input
    end
  ensure
    system("stty -raw echo")
  end
end

#retrieve_containers! ⇒ Object 



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# File 'lib/rancher/shell/commands/exec.rb', line 44

def retrieve_containers!
  @response = @api.get(
    "containers",
  )
  @containers = @response.json['data'].map do |container|
    {
      'id' => container['id'],
      'name' => container['name'],
      'state' => container['state'],
      'ports' => container['ports'],
    }
  end
  @container = @containers.find { |container| container['name'] === @config['options']['container'] }
  exit_with_error "could not find container: #{@config['options']['container']}" unless @container
end

#setup_api! ⇒ Object 



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# File 'lib/rancher/shell/commands/exec.rb', line 36

def setup_api!
  @api = Rancher::Shell::Api.new(
    host: @config['project']['api']['host'],
    user: @config['project']['api']['key'],
    pass: @config['project']['api']['secret'],
  )
end

#setup_websocket! ⇒ Object 



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# File 'lib/rancher/shell/commands/exec.rb', line 60

def setup_websocket!
  logger.info "container = #{@container['id']}"
  # default_bash_command = "TERM=xterm-256color; export TERM; [ -x /bin/bash ] && ([ -x /usr/bin/script ] && /usr/bin/script -q -c \"/bin/bash\" /dev/null || exec /bin/bash) || exec /bin/sh"
  # @config['options']['command'] = default_bash_command if @config['options']['command'] === 'bash'
  logger.debug "running command: #{@config['options']['command']}"
  @response = @api.post(
    "containers/#{@container['id']}?action=execute",
    "command" => [
      "/bin/sh",
      "-c",
      @config['options']['command'],
    ],
    "attachStdin" => true,
    "attachStdout" => true,
    "tty" => true,
  )
  websocket_url = "#{@response.json['url']}?token=#{@response.json['token']}"
  logger.info "connecting to #{@response.json['url']} ..."
  @websocket = Rancher::Shell::WebsocketClient.new websocket_url, headers: { 'Authorization' => "Bearer #{@response.json['token']}"}
  @websocket.on :open do |event|
    logger.info "  connected!"
  end
  @websocket.on :chunk do |encoded_chunk|
    chunk = Base64.decode64 encoded_chunk
    emit :message, chunk
  end
  @websocket.on :message do |data|
    $stdout.print data
  end
  @websocket.on :error do |event|
    logger.error "socket error: #{event}"
    Kernel.exit true
  end
  @websocket.on :close do
    logger.error "closed connection"
    Kernel.exit true
  end
end