Module: Stack

Defined in:
lib/stack.rb

Constant Summary collapse

Logger = 
Logger.new(STDOUT)
@@gemhome = 
File.absolute_path(File.realpath(File.dirname(File.expand_path(__FILE__)) + '/..'))

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.connect(config) ⇒ Object 



24
25
26
27
28
29
30
 
# File 'lib/stack.rb', line 24

def Stack.connect(config)
  connection = Fog::Compute.new({ :provider => config[:provider],
                                  :aws_access_key_id => config[:aws_access_key_id],
                                  :aws_secret_access_key => config[:aws_secret_access_key],
                                  :region => config[:region] })
  connection
end

.delete_node(config, fqdn) ⇒ Object 



199
200
201
202
203
204
205
206
207
208
209
 
# File 'lib/stack.rb', line 199

def Stack.delete_node(config, fqdn)
  running_instances = Stack.get_running(config)
  if running_instances[fqdn].nil?
    puts "ERROR: #{fqdn} isn't running!"
    exit
  else
    Stack.connect(config)
    pp running_instances[fqdn]
    running_instances[fqdn].destroy
  end
end

.deploy_all(config) ⇒ Object 



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
 
# File 'lib/stack.rb', line 65

def Stack.deploy_all(config)
  # generate the hostnames & details from the config & apply defaults where required
  Stack.populate_config(config)

  # create a connection
  connection = Stack.connect(config)

  running_instances = Stack.get_running(config)
  config[:roles].each do |role, role_details|
    hostname = role.to_s
    fqdn = role.to_s + '.' + config[:dns_domain]

    if !running_instances[fqdn].nil?
      puts "Skipping #{fqdn} as it already exists"
      next
    end

    # Ubuntu 8.04/Hardy doesn't do full cloud-init, so we have to script setting the hostname
    libdir = File.realpath(@@gemhome + '/lib')

    bootstrap_abs = Stack.find_file(config, config[:node_details][fqdn][:bootstrap])
    cloud_config_yaml_abs = Stack.find_file(config, config[:node_details][fqdn][:cloud_config_yaml])

    multipart_cmd = "#{libdir}/write-mime-multipart #{bootstrap_abs} #{cloud_config_yaml_abs}"
    user_data = `#{multipart_cmd}`

    user_data.gsub!(/rentpro-unconfigured/, hostname)
    user_data.gsub!(/rentpro-stage.local/, config[:dns_domain])


    # pp multipart
    #
    puts "Bootstraping new instance - #{fqdn}, in #{config[:availability_zone]}, flavor #{config[:node_details][fqdn][:flavor_id]}, image_id #{config[:image_id]}"
    server = connection.servers.create({
                                      :name => fqdn,
                                      :hostname => fqdn,
                                      :availability_zone => config[:availability_zone],
                                      :flavor_id => config[:node_details][fqdn][:flavor_id],
                                      :image_id => config[:image_id],
                                      :key_name => config[:keypair],
                                      :user_data => user_data,
                                      :tags => { 'Name' => fqdn },
                                      })

    print "Waiting for instance to be ready..."
    server.wait_for { ready? }
    puts "#{role.to_s} is booted, #{server.public_ip_address}/#{server.private_ip_address}"

    if false
    # create/update the public & private DNS for this host
    Stack.update_dns(role.to_s + '-public.' + config[:dns_domain], server.public_ip_address, config)
    Stack.update_dns(role.to_s + '-private.' + config[:dns_domain], server.private_ip_address, config)

    # create the dns
    if (role_details[:publish_private_ip] == true && (!role_details[:publish_private_ip].nil?))
      ip_address = server.private_ip_address
    else
      ip_address = server.public_ip_address
    end
    Stack.update_dns(fqdn, ip_address, config)
    #
    # is this a wildcard DNS host, then claim the *.domain.net
    if (role_details[:dns_wildcard] == true && (!role_details[:dns_wildcard].nil?))
      wildcard = "*." + config[:dns_domain]
      Stack.update_dns(wildcard, ip_address, config)
    end
    end
  end
end

.find_file(config, filename) ⇒ Object 



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
 
# File 'lib/stack.rb', line 249

def Stack.find_file(config, filename)
  # find a file, using the standard path precedence
  # 1) cwd
  # 2) stackhome
  # 2) stackhome + find_file_paths
  # 3) gemhome/lib

  if filename.nil? || filename.empty?
    raise ArgumentError
  end

  dirs = [ '.' ]  # current directory
  dirs.push(config[:stackhome])
  config[:find_file_paths].each { |fp| dirs.push(File.join(config[:stackhome], fp)) }
  dirs.push(File.join(@@gemhome, 'lib'))
  dirs.push('')   # find absolute paths
  dirs.flatten!

  Logger.debug "find_file, looking for #{filename} in #{dirs}"
  filename_fqp = ''
  dirs.each do |dir|
    fqp = File.join(dir, filename)
    Logger.debug "find_file: checking #{fqp}"
    if File.file?(fqp)
    Logger.debug "find_file: found #{fqp}!"
      filename_fqp =  File.expand_path(fqp)
    end
  end

  if filename_fqp.empty?
    Logger.warn "couldn't find #{filename} in #{dirs}"
    filename_fqp = nil
  end
  filename_fqp
end

.generate_hostnames(config) ⇒ Object 



56
57
58
59
60
61
62
63
 
# File 'lib/stack.rb', line 56

def Stack.generate_hostnames(config)
  stack_hostnames = Array.new
  config[:roles].each do |role, role_details|
    fqdn = role.to_s + '.' + config[:dns_domain]
    stack_hostnames << fqdn
  end
  stack_hostnames
end

.get_running(config) ⇒ Object 



170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
 
# File 'lib/stack.rb', line 170

def Stack.get_running(config)
  # create a connection
  connection = Stack.connect(config)

  # generate all the names that this stack will use
  stack_hostnames = Stack.generate_hostnames(config)

  # Amazon EC2, use the tags hash to find hostnames
  running_instances = Hash.new
  connection.servers.each do |instance|
    # pp instance
    if (!instance.tags['Name'].nil? && instance.state != 'terminated' && instance.state != 'shutting-down')
      hostname = instance.tags['Name']
      if stack_hostnames.include?(hostname)
        running_instances[hostname] = instance
      end
    end
  end
  running_instances
end

.load_config(configfile, stack) ⇒ Object 



15
16
17
18
19
20
21
22
 
# File 'lib/stack.rb', line 15

def Stack.load_config(configfile, stack)
  config_raw = File.read(configfile)
  eval(config_raw)

  config = StackConfig::Stacks[stack]
  config[:stackhome] = File.dirname(File.expand_path(configfile))
  config
end

.populate_config(config) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/stack.rb', line 32

def Stack.populate_config(config)

  config[:find_file_paths] = Array.new if config[:find_file_paths].nil?

  # build out the full config for each node, supplying defaults from the
  # global config if explicitly supplied
  config[:node_details] = Hash.new if config[:node_details].nil?

  config[:roles].each do |role, role_details|
    fqdn = role.to_s + '.' + config[:dns_domain]

    config[:node_details][fqdn] = {
      # set the node details from the role, if not specified in the role, use the config global
      # (takes advantage of left to right evaluation of ||)
      :flavor_id          => (role_details[:flavor_id] || config[:flavor_id]),
      :count              => (role_details[:count] || 1),
      :publish_private_ip => (role_details[:publish_private_ip] || false),
      :dns_wildcard       => (role_details[:dns_wildcard] || false),
      :bootstrap          => (role_details[:bootstrap] || 'user-data.sh'),
      :cloud_config_yaml  => (role_details[:cloud_config_yaml] || 'cloud-init.yaml'),
    }
  end
end

.show_details(config) ⇒ Object 



211
212
213
214
215
216
217
218
219
220
221
222
 
# File 'lib/stack.rb', line 211

def Stack.show_details(config)
  # create a connection
  connection = Stack.connect(config)

  pp connection.describe_regions
  pp connection.describe_availability_zones

  pp connection.servers

  Stack.populate_config(config)
  pp config[:node_details]
end

.show_dns(config) ⇒ Object 



153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
 
# File 'lib/stack.rb', line 153

def Stack.show_dns(config)
  # now register it in DNS
  dns = Fog::DNS.new({ :provider => config[:provider],
                        :aws_access_key_id => config[:aws_access_key_id],
                        :aws_secret_access_key => config[:aws_secret_access_key] })

  zone = dns.zones.get(config[:dns_id])
  if zone.records.empty?
    puts "No DNS records found in #{config[:dns_domain]}"
  else
    printf("%40s %20s %5s %5s\n", 'fqdn', 'value', 'type', 'ttl')
    zone.records.each do |record|
      printf("%40s %20s %5s %5d\n", record.name, record.value, record.type, record.ttl)
    end
  end
end

.show_running(config) ⇒ Object 



191
192
193
194
195
196
197
 
# File 'lib/stack.rb', line 191

def Stack.show_running(config)
  running_instances = Stack.get_running(config)
  running_instances.each do |instance, instance_details|
    # display some details
    puts "#{instance} id=#{instance_details.id} flavor_id=#{instance_details.flavor_id} public_ip=#{instance_details.public_ip_address} private_ip=#{instance_details.private_ip_address}"
  end
end

.update_dns(fqdn, ip_address, config) ⇒ Object 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
 
# File 'lib/stack.rb', line 135

def Stack.update_dns(fqdn, ip_address, config)
  # now register it in DNS
  dns = Fog::DNS.new({ :provider => config[:provider],
                        :aws_access_key_id => config[:aws_access_key_id],
                        :aws_secret_access_key => config[:aws_secret_access_key] })

  # pp dns.get_hosted_zone(config[:dns_id])

  bmtw =  dns.zones.get(config[:dns_id])

  record = bmtw.records.get(fqdn)
  if record
    record.modify(:value => ip_address) if record
  else
    bmtw.records.create(:value => ip_address, :name => fqdn, :type => 'A')
  end
end

.validate(config) ⇒ Object 



241
242
243
244
245
246
247
 
# File 'lib/stack.rb', line 241

def Stack.validate(config)
  # sanity check
  # check credentials, keys, flavor, image, dns etc
  connection = Stack.connect(config)
  pp connection
  pp connection.images.get(config[:image_id])
end

Instance Method Details

#shutdown_all(config) ⇒ Object 



232
233
234
235
236
237
238
239
 
# File 'lib/stack.rb', line 232

def shutdown_all(config)
  # shutdown all instances
  connection.servers.select do |server|
    puts "Running server:"
    # pp server
  #  server.ready? && server.destroy
  end
end

#upload_keys(config) ⇒ Object 



224
225
226
227
228
229
230
 
# File 'lib/stack.rb', line 224

def upload_keys(config)
  if (key_pair = connection.key_pairs.get(config[:keypair]).nil?)
    key_pair = connection.key_pairs.create( :name => config[:keypair], :public_key => File.read("rentpro-deploy.pub") )
  else
    puts "#{config[:keypair]} key_pair already exists"
  end
end