summaryrefslogtreecommitdiff
path: root/lib/leap_cli/config/manager.rb
blob: 7406f1cf67c7ef06abc05e383a64e1afb3fe240f (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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
require 'json/pure'

module LeapCli
  module Config

    #
    # A class to manage all the objects in all the configuration files.
    #
    class Manager

      attr_reader :services, :tags, :nodes, :provider, :common, :secrets

      ##
      ## IMPORT EXPORT
      ##

      #
      # load .json configuration files
      #
      def load(provider_dir=Path.provider)
        @provider_dir = provider_dir
        @services = load_all_json(Path.named_path([:service_config, '*'], provider_dir))
        @tags     = load_all_json(Path.named_path([:tag_config, '*'],     provider_dir))
        @nodes    = load_all_json(Path.named_path([:node_config, '*'],    provider_dir))
        @common   = load_json(Path.named_path(:common_config,   provider_dir))
        @provider = load_json(Path.named_path(:provider_config, provider_dir))
        @secrets  = load_json(Path.named_path(:secrets_config, provider_dir))

        Util::assert!(@provider, "Failed to load provider.json")
        Util::assert!(@common, "Failed to load common.json")

        @nodes.each do |name, node|
          @nodes[name] = apply_inheritance(node)
        end
      end

      #
      # save compiled hiera .yaml files
      #
      def export_nodes(destination_directory = nil)
        dir = destination_directory || Path.named_path(:hiera_dir, @provider_dir)
        existing_files = Dir.glob(dir + '/*.yaml')
        updated_files = []
        @nodes.each do |name, node|
          filepath = "#{dir}/#{name}.yaml"
          updated_files << filepath
          Util::write_file!(filepath, node.dump)
        end
        (existing_files - updated_files).each do |filepath|
          Util::remove_file!(filepath)
        end
      end

      def export_secrets(destination_file = nil)
        if @secrets.any?
          file_path = destination_file || Path.named_path(:secrets_config, @provider_dir)
          Util.write_file!(file_path, @secrets.dump_json + "\n")
        end
      end

      ##
      ## FILTERING
      ##

      #
      # returns a node list consisting only of nodes that satisfy the filter criteria.
      #
      # filter: condition [condition] [condition] [+condition]
      # condition: [node_name | service_name | tag_name]
      #
      # if conditions is prefixed with +, then it works like an AND. Otherwise, it works like an OR.
      #
      def filter(filters)
        if filters.empty?
          return nodes
        end
        if filters[0] =~ /^\+/
          # don't let the first filter have a + prefix
          filters[0] = filters[0][1..-1]
        end

        node_list = Config::ObjectList.new
        filters.each do |filter|
          if filter =~ /^\+/
            keep_list = nodes_for_name(filter[1..-1])
            node_list.delete_if do |name, node|
              if keep_list[name]
                false
              else
                true
              end
            end
          else
            node_list.merge!(nodes_for_name(filter))
          end
        end
        return node_list
      end

      #
      # same as filter(), but exits if there is no matching nodes
      #
      def filter!(filters)
        node_list = filter(filters)
        Util::assert! node_list.any?, "Could not match any nodes from '#{filters}'"
        return node_list
      end

      #
      # returns a single Config::Object that corresponds to a Node.
      #
      def node(name)
        nodes[name]
      end

      #
      # yields each node, in sorted order
      #
      def each_node(&block)
        nodes.each_node &block
      end

      private

      def load_all_json(pattern)
        results = Config::ObjectList.new
        Dir.glob(pattern).each do |filename|
          obj = load_json(filename)
          if obj
            name = File.basename(filename).sub(/\.json$/,'')
            obj['name'] ||= name
            results[name] = obj
          end
        end
        results
      end

      def load_json(filename)
        if !File.exists?(filename)
          return Config::Object.new(self)
        end

        log :loading, filename, 2

        #
        # read file, strip out comments
        # (File.read(filename) would be faster, but we like ability to have comments)
        #
        buffer = StringIO.new
        File.open(filename) do |f|
          while (line = f.gets)
            next if line =~ /^\s*#/
            buffer << line
          end
        end

        # parse json
        begin
          hash = JSON.parse(buffer.string, :object_class => Hash, :array_class => Array) || {}
        rescue SyntaxError => exc
          log 0, :error, 'in file "%s":' % filename
          log 0, exc.to_s, :indent => 1
          return nil
        end
        object = Config::Object.new(self)
        object.deep_merge!(hash)
        return object
      end

      #
      # remove all the nesting from a hash.
      #
      # def flatten_hash(input = {}, output = {}, options = {})
      #   input.each do |key, value|
      #     key = options[:prefix].nil? ? "#{key}" : "#{options[:prefix]}#{options[:delimiter]||"_"}#{key}"
      #     if value.is_a? Hash
      #       flatten_hash(value, output, :prefix => key, :delimiter => options[:delimiter])
      #     else
      #       output[key]  = value
      #     end
      #   end
      #   output.replace(input)
      #   output
      # end

      #
      # makes a node inherit options from appropriate the common, service, and tag json files.
      #
      def apply_inheritance(node)
        new_node = Config::Object.new(self)
        name = node.name

        # inherit from common
        new_node.deep_merge!(@common)

        # inherit from services
        if node['services']
          node['services'].to_a.sort.each do |node_service|
            service = @services[node_service]
            if service.nil?
              log 0, :error, 'in node "%s": the service "%s" does not exist.' % [node['name'], node_service]
            else
              new_node.deep_merge!(service)
              service.node_list.add(name, new_node)
            end
          end
        end

        # inherit from tags
        if node['tags']
          node['tags'].to_a.sort.each do |node_tag|
            tag = @tags[node_tag]
            if tag.nil?
              log 0, :error, 'in node "%s": the tag "%s" does not exist.' % [node['name'], node_tag]
            else
              new_node.deep_merge!(tag)
              tag.node_list.add(name, new_node)
            end
          end
        end

        # inherit from node
        new_node.deep_merge!(node)
        return new_node
      end

      #
      # returns a set of nodes corresponding to a single name, where name could be a node name, service name, or tag name.
      #
      def nodes_for_name(name)
        if node = self.nodes[name]
          Config::ObjectList.new(node)
        elsif service = self.services[name]
          service.node_list
        elsif tag = self.tags[name]
          tag.node_list
        else
          {}
        end
      end

      #
      # TODO: apply JSON spec
      #
      PRIVATE_IP_RANGES = /(^127\.0\.0\.1)|(^10\.)|(^172\.1[6-9]\.)|(^172\.2[0-9]\.)|(^172\.3[0-1]\.)|(^192\.168\.)/
      def validate_provider(provider)
        Util::assert! provider.vagrant.network =~ PRIVATE_IP_RANGES, 'provider.json error: vagrant.network is not a local private network'
      end

    end
  end
end