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#
# Author:: Lamont Granquist (<lamont@chef.io>)
# Copyright:: Copyright (c) 2014 Chef Software, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# XXX: mixing shellout into a mixin into classes has to be code smell
require 'chef/mixin/shell_out'
require 'chef/mixin/which'
class Chef
class Platform
class ServiceHelpers
class << self
include Chef::Mixin::ShellOut
include Chef::Mixin::Which
# This helper is mostly used to sort out the mess of different
# linux mechanisms that can be used to start services. It does
# not necessarily need to linux-specific, but currently all our
# other service providers are narrowly platform-specific with no
# alternatives.
#
# NOTE: if a system has (for example) chkconfig installed then we
# should report that chkconfig is installed. The fact that a system
# may also have systemd installed does not mean that we do not
# report that systemd is also installed. This module is purely for
# discovery of all the alternatives, handling the priority of the
# different services is NOT a design concern of this module.
#
def service_resource_providers
service_resource_providers = []
if ::File.exist?("/usr/sbin/update-rc.d")
service_resource_providers << :debian
end
if ::File.exist?("/usr/sbin/invoke-rc.d")
service_resource_providers << :invokercd
end
if ::File.exist?("/sbin/insserv")
service_resource_providers << :insserv
end
# debian >= 6.0 has /etc/init but does not have upstart
if ::File.exist?("/etc/init") && ::File.exist?("/sbin/start")
service_resource_providers << :upstart
end
if ::File.exist?("/sbin/chkconfig")
service_resource_providers << :redhat
end
if systemd_sanity_check?
service_resource_providers << :systemd
end
service_resource_providers
end
def config_for_service(service_name)
configs = []
if ::File.exist?("/etc/init.d/#{service_name}")
configs << :initd
end
if ::File.exist?("/etc/init/#{service_name}.conf")
configs << :upstart
end
if ::File.exist?("/etc/xinetd.d/#{service_name}")
configs << :xinetd
end
if ::File.exist?("/etc/rc.d/#{service_name}")
configs << :etc_rcd
end
if ::File.exist?("/usr/local/etc/rc.d/#{service_name}")
configs << :usr_local_etc_rcd
end
if systemd_sanity_check? && platform_has_systemd_unit?(service_name)
configs << :systemd
end
configs
end
private
def systemctl_path
if @systemctl_path.nil?
@systemctl_path = which("systemctl")
end
@systemctl_path
end
def systemd_sanity_check?
systemctl_path && File.exist?("/proc/1/comm") && File.open("/proc/1/comm").gets.chomp == "systemd"
end
def extract_systemd_services(command)
output = shell_out!(command).stdout
# first line finds e.g. "sshd.service"
services = []
output.each_line do |line|
fields = line.split
services << fields[0] if fields[1] == "loaded" || fields[1] == "not-found"
end
# this splits off the suffix after the last dot to return "sshd"
services += services.select {|s| s.match(/\.service$/) }.map { |s| s.sub(/(.*)\.service$/, '\1') }
rescue Mixlib::ShellOut::ShellCommandFailed
false
end
def platform_has_systemd_unit?(service_name)
services = extract_systemd_services("#{systemctl_path} --all") +
extract_systemd_services("#{systemctl_path} list-unit-files")
services.include?(service_name)
rescue Mixlib::ShellOut::ShellCommandFailed
false
end
end
end
end
end
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