summaryrefslogtreecommitdiff
path: root/lib/chef/provider/ifconfig.rb
blob: 50b05304ff9f133618b110ce530485a1ee39b6d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
#
# Author:: Jason K. Jackson (jasonjackson@gmail.com)
# Copyright:: Copyright 2009-2016, Jason K. Jackson
# 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/log"
require "chef/mixin/command"
require "chef/mixin/shell_out"
require "chef/provider"
require "chef/resource/file"
require "chef/exceptions"
require "erb"

#  Recipe example:
#
#    int = {Hash with your network settings...}
#
#    ifconfig  int['ip'] do
#      ignore_failure  true
#      device  int['dev']
#      mask    int['mask']
#      gateway int['gateway']
#      mtu     int['mtu']
#    end

class Chef
  class Provider
    class Ifconfig < Chef::Provider
      provides :ifconfig

      include Chef::Mixin::ShellOut
      include Chef::Mixin::Command

      attr_accessor :config_template
      attr_accessor :config_path

      def initialize(new_resource, run_context)
        super(new_resource, run_context)
        @config_template = nil
        @config_path = nil
      end

      def whyrun_supported?
        true
      end

      def load_current_resource
        @current_resource = Chef::Resource::Ifconfig.new(@new_resource.name)

        @ifconfig_success = true
        @interfaces = {}

        @status = shell_out("ifconfig")
        @status.stdout.each_line do |line|
          if !line[0..9].strip.empty?
            @int_name = line[0..9].strip
            @interfaces[@int_name] = {"hwaddr" => (line =~ /(HWaddr)/ ? ($') : "nil").strip.chomp }
          else
            @interfaces[@int_name]["inet_addr"] = (line =~ /inet addr:(\S+)/ ? ($1) : "nil") if line =~ /inet addr:/
            @interfaces[@int_name]["bcast"] = (line =~ /Bcast:(\S+)/ ? ($1) : "nil") if line =~ /Bcast:/
            @interfaces[@int_name]["mask"] = (line =~ /Mask:(\S+)/ ? ($1) : "nil") if line =~ /Mask:/
            @interfaces[@int_name]["mtu"] = (line =~ /MTU:(\S+)/ ? ($1) : "nil") if line =~ /MTU:/
            @interfaces[@int_name]["metric"] = (line =~ /Metric:(\S+)/ ? ($1) : "nil") if line =~ /Metric:/
          end

          if @interfaces.has_key?(@new_resource.device)
            @interface = @interfaces.fetch(@new_resource.device)

            @current_resource.target(@new_resource.target)
            @current_resource.device(@new_resource.device)
            @current_resource.inet_addr(@interface["inet_addr"])
            @current_resource.hwaddr(@interface["hwaddr"])
            @current_resource.bcast(@interface["bcast"])
            @current_resource.mask(@interface["mask"])
            @current_resource.mtu(@interface["mtu"])
            @current_resource.metric(@interface["metric"])
          end
        end
        @current_resource
      end

      def define_resource_requirements
        requirements.assert(:all_actions) do |a|
          a.assertion { @status.exitstatus == 0 }
          a.failure_message Chef::Exceptions::Ifconfig, "ifconfig failed - #{@status.inspect}!"
          # no whyrun - if the base ifconfig used in load_current_resource fails
          # there's no reasonable action that could have been taken in the course of
          # a chef run to fix it.
        end
      end

      def action_add
        # check to see if load_current_resource found interface in ifconfig
        unless @current_resource.inet_addr
          unless @new_resource.device == loopback_device
            command = add_command
            converge_by ("run #{command} to add #{@new_resource}") do
              run_command(
                :command => command,
              )
              Chef::Log.info("#{@new_resource} added")
            end
          end
        end
        # Write out the config files
        generate_config
      end

      def action_enable
        # check to see if load_current_resource found ifconfig
        # enables, but does not manage config files
        unless @current_resource.inet_addr
          unless @new_resource.device == loopback_device
            command = enable_command
            converge_by ("run #{command} to enable #{@new_resource}") do
              run_command(
                :command => command,
              )
              Chef::Log.info("#{@new_resource} enabled")
            end
          end
        end
      end

      def action_delete
        # check to see if load_current_resource found the interface
        if @current_resource.device
          command = delete_command
          converge_by ("run #{command} to delete #{@new_resource}") do
            run_command(
              :command => command,
            )
            Chef::Log.info("#{@new_resource} deleted")
          end
        else
          Chef::Log.debug("#{@new_resource} does not exist - nothing to do")
        end
        delete_config
      end

      def action_disable
        # check to see if load_current_resource found the interface
        # disables, but leaves config files in place.
        if @current_resource.device
          command = disable_command
          converge_by ("run #{command} to disable #{@new_resource}") do
            run_command(
              :command => command,
            )
            Chef::Log.info("#{@new_resource} disabled")
          end
        else
          Chef::Log.debug("#{@new_resource} does not exist - nothing to do")
        end
      end

      def can_generate_config?
        ! @config_template.nil? and ! @config_path.nil?
      end

      def resource_for_config(path)
        Chef::Resource::File.new(path, run_context)
      end

      def generate_config
        return unless can_generate_config?
        b = binding
        template = ::ERB.new(@config_template)
        config = resource_for_config(@config_path)
        config.content(template.result(b))
        config.run_action(:create)
        @new_resource.updated_by_last_action(true) if config.updated?
      end

      def delete_config
        return unless can_generate_config?
        config = resource_for_config(@config_path)
        config.run_action(:delete)
        @new_resource.updated_by_last_action(true) if config.updated?
      end

      private
      def add_command
        command = "ifconfig #{@new_resource.device} #{@new_resource.target}"
        command << " netmask #{@new_resource.mask}" if @new_resource.mask
        command << " metric #{@new_resource.metric}" if @new_resource.metric
        command << " mtu #{@new_resource.mtu}" if @new_resource.mtu
        command
      end

      def enable_command
        command = "ifconfig #{@new_resource.device} #{@new_resource.target}"
        command << " netmask #{@new_resource.mask}" if @new_resource.mask
        command << " metric #{@new_resource.metric}" if @new_resource.metric
        command << " mtu #{@new_resource.mtu}" if @new_resource.mtu
        command
      end

      def disable_command
        "ifconfig #{@new_resource.device} down"
      end

      def delete_command
        "ifconfig #{@new_resource.device} down"
      end

      def loopback_device
        "lo"
      end
    end
  end
end