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#
# Author:: Nathan Williams (<nath.e.will@gmail.com>)
# Copyright:: Copyright 2016, Nathan Williams
# 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.
#
require "chef/provider"
require "chef/mixin/which"
require "chef/mixin/shell_out"
require "chef/resource/file"
require "iniparse"
class Chef
class Provider
class SystemdUnit < Chef::Provider
include Chef::Mixin::Which
include Chef::Mixin::ShellOut
provides :systemd_unit, os: "linux"
def load_current_resource
@current_resource = Chef::Resource::SystemdUnit.new(new_resource.name)
current_resource.content(::File.read(unit_path)) if ::File.exist?(unit_path)
current_resource.user(new_resource.user)
current_resource.enabled(enabled?)
current_resource.active(active?)
current_resource.masked(masked?)
current_resource.static(static?)
current_resource.triggers_reload(new_resource.triggers_reload)
current_resource
end
def define_resource_requirements
super
requirements.assert(:create) do |a|
a.assertion { IniParse.parse(new_resource.to_ini) }
a.failure_message "Unit content is not valid INI text"
end
end
def action_create
if current_resource.content != new_resource.to_ini
converge_by("creating unit: #{new_resource.name}") do
manage_unit_file(:create)
daemon_reload if new_resource.triggers_reload
end
end
end
def action_delete
if ::File.exist?(unit_path)
converge_by("deleting unit: #{new_resource.name}") do
manage_unit_file(:delete)
daemon_reload if new_resource.triggers_reload
end
end
end
def action_enable
if current_resource.static
Chef::Log.debug("#{new_resource.name} is a static unit, enabling is a NOP.")
end
unless current_resource.enabled || current_resource.static
converge_by("enabling unit: #{new_resource.name}") do
systemctl_execute!(:enable, new_resource.name)
end
end
end
def action_disable
if current_resource.static
Chef::Log.debug("#{new_resource.name} is a static unit, disabling is a NOP.")
end
if current_resource.enabled && !current_resource.static
converge_by("disabling unit: #{new_resource.name}") do
systemctl_execute!(:disable, new_resource.name)
end
end
end
def action_mask
unless current_resource.masked
converge_by("masking unit: #{new_resource.name}") do
systemctl_execute!(:mask, new_resource.name)
end
end
end
def action_unmask
if current_resource.masked
converge_by("unmasking unit: #{new_resource.name}") do
systemctl_execute!(:unmask, new_resource.name)
end
end
end
def action_start
unless current_resource.active
converge_by("starting unit: #{new_resource.name}") do
systemctl_execute!(:start, new_resource.name)
end
end
end
def action_stop
if current_resource.active
converge_by("stopping unit: #{new_resource.name}") do
systemctl_execute!(:stop, new_resource.name)
end
end
end
def action_restart
converge_by("restarting unit: #{new_resource.name}") do
systemctl_execute!(:restart, new_resource.name)
end
end
def action_reload
if current_resource.active
converge_by("reloading unit: #{new_resource.name}") do
systemctl_execute!(:reload, new_resource.name)
end
else
Chef::Log.debug("#{new_resource.name} is not active, skipping reload.")
end
end
def active?
systemctl_execute("is-active", new_resource.name).exitstatus == 0
end
def enabled?
systemctl_execute("is-enabled", new_resource.name).exitstatus == 0
end
def masked?
systemctl_execute(:status, new_resource.name).stdout.include?("masked")
end
def static?
systemctl_execute("is-enabled", new_resource.name).stdout.include?("static")
end
private
def unit_path
if new_resource.user
"/etc/systemd/user/#{new_resource.name}"
else
"/etc/systemd/system/#{new_resource.name}"
end
end
def manage_unit_file(action = :nothing)
Chef::Resource::File.new(unit_path, run_context).tap do |f|
f.owner "root"
f.group "root"
f.mode "0644"
f.content new_resource.to_ini
end.run_action(action)
end
def daemon_reload
shell_out_with_systems_locale!("#{systemctl_path} daemon-reload")
end
def systemctl_execute!(action, unit)
shell_out_with_systems_locale!("#{systemctl_cmd} #{action} #{unit}", systemctl_opts)
end
def systemctl_execute(action, unit)
shell_out("#{systemctl_cmd} #{action} #{unit}", systemctl_opts)
end
def systemctl_cmd
@systemctl_cmd ||= "#{systemctl_path} #{systemctl_args}"
end
def systemctl_path
@systemctl_path ||= which("systemctl")
end
def systemctl_args
@systemctl_args ||= new_resource.user ? "--user" : "--system"
end
def systemctl_opts
@systemctl_opts ||=
if new_resource.user
{
"user" => new_resource.user,
"environment" => {
"DBUS_SESSION_BUS_ADDRESS" => "unix:path=/run/user/#{node['etc']['passwd'][new_resource.user]['uid']}/bus",
},
}
else
{}
end
end
end
end
end
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