class Chef::Provider::Service::Debian

Constants

RUNLEVELS
UPDATE_RC_D_ENABLED_MATCHES
UPDATE_RC_D_PRIORITIES

Public Class Methods

supports?(resource, action) click to toggle source
# File lib/chef/provider/service/debian.rb, line 33
def self.supports?(resource, action)
  service_script_exist?(:initd, resource.service_name)
end

Public Instance Methods

define_resource_requirements() click to toggle source
# File lib/chef/provider/service/debian.rb, line 44
def define_resource_requirements
  # do not call super here, inherit only shared_requirements
  shared_resource_requirements
  requirements.assert(:all_actions) do |a|
    update_rcd = "/usr/sbin/update-rc.d"
    a.assertion { ::File.exist? update_rcd }
    a.failure_message Chef::Exceptions::Service, "#{update_rcd} does not exist!"
    # no whyrun recovery - this is a base system component of debian
    # distros and must be present
  end

  requirements.assert(:all_actions) do |a|
    a.assertion { @got_priority == true }
    a.failure_message Chef::Exceptions::Service, "Unable to determine priority for service"
    # This can happen if the service is not yet installed,so we'll fake it.
    a.whyrun ["Unable to determine priority of service, assuming service would have been correctly installed earlier in the run.",
              "Assigning temporary priorities to continue.",
              "If this service is not properly installed prior to this point, this will fail."] do
                temp_priorities = { "6" => [:stop, "20"],
                                    "0" => [:stop, "20"],
                                    "1" => [:stop, "20"],
                                    "2" => [:start, "20"],
                                    "3" => [:start, "20"],
                                    "4" => [:start, "20"],
                                    "5" => [:start, "20"] }
                current_resource.priority(temp_priorities)
              end
  end
end
disable_service() click to toggle source
# File lib/chef/provider/service/debian.rb, line 168
def disable_service
  if new_resource.priority.is_a? Hash
    # We call the same command regardless if we're enabling or disabling
    # Users passing a Hash are responsible for setting their own stop priorities
    set_priority
    return
  end

  shell_out!("/usr/sbin/update-rc.d -f #{new_resource.service_name} remove")
  shell_out!("/usr/sbin/update-rc.d #{new_resource.service_name} defaults")
  shell_out!("/usr/sbin/update-rc.d #{new_resource.service_name} disable")
end
enable_service() click to toggle source
# File lib/chef/provider/service/debian.rb, line 152
def enable_service
  # We call the same command regardless if we're enabling or disabling
  # Users passing a Hash are responsible for setting their own stop priorities
  if new_resource.priority.is_a? Hash
    set_priority
    return
  end

  start_priority = new_resource.priority.is_a?(Integer) ? new_resource.priority : 20
  # Stop processes in reverse order of start using '100 - start_priority'.
  stop_priority = 100 - start_priority

  shell_out!("/usr/sbin/update-rc.d -f #{new_resource.service_name} remove")
  shell_out!("/usr/sbin/update-rc.d #{new_resource.service_name} defaults #{start_priority} #{stop_priority}")
end
get_priority() click to toggle source
# File lib/chef/provider/service/debian.rb, line 92
def get_priority
  priority = {}
  rc_files = []

  levels = parse_init_file(@init_command)
  levels.each do |level|
    rc_files.push Dir.glob("/etc/rc#{level}.d/[SK][0-9][0-9]#{current_resource.service_name}")
  end

  rc_files.flatten.each do |line|
    if UPDATE_RC_D_PRIORITIES =~ line
      # priority[runlevel] = [ S|K, priority ]
      # S = Start, K = Kill
      # debian runlevels: 0 Halt, 1 Singleuser, 2 Multiuser, 3-5 == 2, 6 Reboot
      priority[$1] = [($2 == "S" ? :start : :stop), $3]
    end
  end

  # Reduce existing priority back to an integer if appropriate, picking
  # runlevel 2 as a baseline
  if priority[2] && [2..5].all? { |runlevel| priority[runlevel] == priority[2] }
    priority = priority[2].last
  end

  @got_priority = true
  priority
end
load_current_resource() click to toggle source
# File lib/chef/provider/service/debian.rb, line 37
def load_current_resource
  super
  current_resource.priority(get_priority)
  current_resource.enabled(service_currently_enabled?(current_resource.priority))
  current_resource
end
parse_init_file(path) click to toggle source

returns a list of levels that the service should be stopped or started on

# File lib/chef/provider/service/debian.rb, line 75
def parse_init_file(path)
  return [] unless ::File.exist?(path)

  in_info = false
  ::File.readlines(path).each_with_object([]) do |line, acc|
    if /^### BEGIN INIT INFO/.match?(line)
      in_info = true
    elsif /^### END INIT INFO/.match?(line)
      break acc
    elsif in_info
      if line =~ /Default-(Start|Stop):\s+(\d.*)/
        acc << $2.split(" ")
      end
    end
  end.flatten
end
service_currently_enabled?(priority) click to toggle source
# File lib/chef/provider/service/debian.rb, line 120
def service_currently_enabled?(priority)
  enabled = false
  priority.each do |runlevel, arguments|
    logger.trace("#{new_resource} runlevel #{runlevel}, action #{arguments[0]}, priority #{arguments[1]}")
    # if we are in a update-rc.d default startup runlevel && we start in this runlevel
    if RUNLEVELS.include?(runlevel) && arguments[0] == :start
      enabled = true
    end
  end

  enabled
end
set_priority() click to toggle source
# File lib/chef/provider/service/debian.rb, line 181
def set_priority
  shell_out!("/usr/sbin/update-rc.d -f #{new_resource.service_name} remove")

  # Reset priorities to default values before applying customizations. This way
  # the final state will always be consistent, regardless if all runlevels were
  # provided.
  shell_out!("/usr/sbin/update-rc.d #{new_resource.service_name} defaults")
  new_resource.priority.each do |level, (action, _priority)|
    disable_or_enable = (action == :start ? "enable" : "disable")

    shell_out!("/usr/sbin/update-rc.d #{new_resource.service_name} #{disable_or_enable} #{level}")
  end
end