aboutsummaryrefslogtreecommitdiff
path: root/lib/leap_cli/config/manager.rb
blob: 00d2f972b85ccbb559f5da6242519d1b4faf3847 (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
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
# encoding: utf-8

require 'json/pure'

if $ruby_version < [1,9]
  require 'iconv'
end

module LeapCli
  module Config

    class Environment
      attr_accessor :services, :tags, :provider
    end

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

      def initialize
        @environments = {} # hash of `Environment` objects, keyed by name.
      end

      ##
      ## ATTRIBUTES
      ##

      attr_reader :nodes, :common, :secrets
      attr_reader :base_services, :base_tags, :base_provider, :base_common

      #
      # returns the Hash of the contents of facts.json
      #
      def facts
        @facts ||= JSON.parse(Util.read_file(:facts) || "{}")
      end

      #
      # returns an Array of all the environments defined for this provider.
      # the returned array includes nil (for the default environment)
      #
      def environment_names
        @environment_names ||= [nil] + env.tags.collect {|name, tag| tag['environment']}.compact
      end

      #
      # Returns the appropriate environment variable
      #
      def env(env=nil)
        env ||= 'default'
        e = @environments[env] ||= Environment.new
        yield e if block_given?
        e
      end

      def services; env('default').services; end
      def tags; env('default').tags; end
      def provider; env('default').provider; end

      ##
      ## IMPORT EXPORT
      ##

      #
      # load .json configuration files
      #
      def load(options = {})
        @provider_dir = Path.provider

        # load base
        @base_services = load_all_json(Path.named_path([:service_config, '*'], Path.provider_base), Config::Tag)
        @base_tags     = load_all_json(Path.named_path([:tag_config, '*'],     Path.provider_base), Config::Tag)
        @base_common   = load_json(    Path.named_path(:common_config,         Path.provider_base), Config::Object)
        @base_provider = load_json(    Path.named_path(:provider_config,       Path.provider_base), Config::Provider)

        # load provider
        @nodes    = load_all_json(Path.named_path([:node_config, '*'],  @provider_dir), Config::Node)
        @common   = load_json(    Path.named_path(:common_config,       @provider_dir), Config::Object)
        @secrets  = load_json(    Path.named_path(:secrets_config,      @provider_dir), Config::Secrets)
        @common.inherit_from! @base_common

        # load provider services, tags, and provider.json, DEFAULT environment
        log 3, :loading, 'default environment.........'
        env('default') do |e|
          e.services = load_all_json(Path.named_path([:service_config, '*'], @provider_dir), Config::Tag, :no_dots => true)
          e.tags     = load_all_json(Path.named_path([:tag_config, '*'],     @provider_dir), Config::Tag, :no_dots => true)
          e.provider = load_json(    Path.named_path(:provider_config,       @provider_dir), Config::Provider, :assert => true)
          e.services.inherit_from! @base_services
          e.tags.inherit_from!     @base_tags
          e.provider.inherit_from! @base_provider
          validate_provider(e.provider)
        end

        # load provider services, tags, and provider.json, OTHER environments
        environment_names.each do |ename|
          next unless ename
          log 3, :loading, '%s environment.........' % ename
          env(ename) do |e|
            e.services = load_all_json(Path.named_path([:service_env_config, '*', ename], @provider_dir), Config::Tag)
            e.tags     = load_all_json(Path.named_path([:tag_env_config, '*', ename],     @provider_dir), Config::Tag)
            e.provider = load_json(    Path.named_path([:provider_env_config, ename],     @provider_dir), Config::Provider)
            e.services.inherit_from! env.services
            e.tags.inherit_from!     env.tags
            e.provider.inherit_from! env.provider
            validate_provider(e.provider)
          end
        end

        @nodes.each do |name, node|
          Util::assert! name =~ /^[0-9a-z-]+$/, "Illegal character(s) used in node name '#{name}'"
          @nodes[name] = apply_inheritance(node)
        end

        unless options[:include_disabled]
          remove_disabled_nodes
        end
      end

      #
      # save compiled hiera .yaml files
      #
      # if a node_list is specified, only update those .yaml files.
      # otherwise, update all files, destroying files that are no longer used.
      #
      def export_nodes(node_list=nil)
        updated_hiera = []
        updated_files = []
        existing_hiera = nil
        existing_files = nil

        unless node_list
          node_list = self.nodes
          existing_hiera = Dir.glob(Path.named_path([:hiera, '*'], @provider_dir))
          existing_files = Dir.glob(Path.named_path([:node_files_dir, '*'], @provider_dir))
        end

        node_list.each_node do |node|
          filepath = Path.named_path([:node_files_dir, node.name], @provider_dir)
          hierapath = Path.named_path([:hiera, node.name], @provider_dir)
          Util::write_file!(hierapath, node.dump_yaml)
          updated_files << filepath
          updated_hiera << hierapath
        end

        if @disabled_nodes
          # make disabled nodes appear as if they are still active
          @disabled_nodes.each_node do |node|
            updated_files << Path.named_path([:node_files_dir, node.name], @provider_dir)
            updated_hiera << Path.named_path([:hiera, node.name], @provider_dir)
          end
        end

        # remove files that are no longer needed
        if existing_hiera
          (existing_hiera - updated_hiera).each do |filepath|
            Util::remove_file!(filepath)
          end
        end
        if existing_files
          (existing_files - updated_files).each do |filepath|
            Util::remove_directory!(filepath)
          end
        end
      end

      def export_secrets(clean_unused_secrets = false)
        if @secrets.any?
          Util.write_file!([:secrets_config, @provider_dir], @secrets.dump_json(clean_unused_secrets) + "\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.
      #
      # options:
      # :local -- if :local is false and the filter is empty, then local nodes are excluded.
      #
      def filter(filters, options={})
        if filters.empty?
          if options[:local] === false
            return nodes[:environment => '!local']
          else
            return nodes
          end
        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.join ' '}'"
        return node_list
      end

      #
      # returns a single Config::Object that corresponds to a Node.
      #
      def node(name)
        if name =~ /\./
          # probably got a fqdn, since periods are not allowed in node names.
          # so, take the part before the first period as the node name
          name = name.split('.').first
        end
        @nodes[name]
      end

      #
      # returns a single node that is disabled
      #
      def disabled_node(name)
        @disabled_nodes[name]
      end

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

      def reload_node!(node)
        @nodes[node.name] = apply_inheritance!(node)
      end

      private

      def load_all_json(pattern, object_class, options={})
        results = Config::ObjectList.new
        Dir.glob(pattern).each do |filename|
          next if options[:no_dots] && File.basename(filename) !~ /^[^\.]*\.json$/
          obj = load_json(filename, object_class)
          if obj
            name = File.basename(filename).force_encoding('utf-8').sub(/^([^\.]+).*\.json$/,'\1')
            obj['name'] ||= name
            results[name] = obj
          end
        end
        results
      end

      def load_json(filename, object_class, options={})
        if options[:assert]
          Util::assert_files_exist!(filename)
        end
        if !File.exists?(filename)
          return object_class.new(self)
        end

        log :loading, filename, 3

        #
        # Read a JSON file, strip out comments.
        #
        # UTF8 is the default encoding for JSON, but others are allowed:
        # https://www.ietf.org/rfc/rfc4627.txt
        #
        buffer = StringIO.new
        File.open(filename, "rb", :encoding => 'UTF-8') do |f|
          while (line = f.gets)
            next if line =~ /^\s*\/\//
            buffer << line
          end
        end

        #
        # force UTF-8
        #
        if $ruby_version >= [1,9]
          string = buffer.string.force_encoding('utf-8')
        else
          string = Iconv.conv("UTF-8//IGNORE", "UTF-8", buffer.string)
        end

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

        # Guess the environment of the node from the tag names.
        # (Technically, this is wrong: a tag that sets the environment might not be
        #  named the same as the environment. This code assumes that it is).
        node_env = self.env
        if node['tags']
          node['tags'].to_a.each do |tag|
            if self.environment_names.include?(tag)
              node_env = self.env(tag)
            end
          end
        end

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

        # inherit from services
        if node['services']
          node['services'].to_a.each do |node_service|
            service = node_env.services[node_service]
            if service.nil?
              msg = 'in node "%s": the service "%s" does not exist.' % [node['name'], node_service]
              log 0, :error, msg
              raise LeapCli::ConfigError.new(node, "error " + msg) if throw_exceptions
            else
              new_node.deep_merge!(service)
              self.services[node_service].node_list.add(name, new_node)
            end
          end
        end

        # inherit from tags
        if node.vagrant?
          node['tags'] = (node['tags'] || []).to_a + ['local']
        end
        if node['tags']
          node['tags'].to_a.each do |node_tag|
            tag = node_env.tags[node_tag]
            if tag.nil?
              msg = 'in node "%s": the tag "%s" does not exist.' % [node['name'], node_tag]
              log 0, :error, msg
              raise LeapCli::ConfigError.new(node, "error " + msg) if throw_exceptions
            else
              new_node.deep_merge!(tag)
              self.tags[node_tag].node_list.add(name, new_node)
            end
          end
        end

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

      def apply_inheritance!(node)
        apply_inheritance(node, true)
      end

      def remove_disabled_nodes
        @disabled_nodes = Config::ObjectList.new
        @nodes.each do |name, node|
          unless node.enabled
            log 2, :skipping, "disabled node #{name}."
            @nodes.delete(name)
            @disabled_nodes[name] = node
            if node['services']
              node['services'].to_a.each do |node_service|
                self.services[node_service].node_list.delete(node.name)
              end
            end
            if node['tags']
              node['tags'].to_a.each do |node_tag|
                self.tags[node_tag].node_list.delete(node.name)
              end
            end
          end
        end
      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

      def validate_provider(provider)
        # nothing yet.
      end

    end
  end
end