Class: AwsUtils::Ec2AddSecurityGroup

Inherits:
Ec2SecurityGroup show all
Defined in:
lib/awsutils/ec2addsg.rb

Instance Method Summary collapse

Methods inherited from Ec2SecurityGroup

#assigned?, #connection, #current_groups, #exist?, #groups, #references

Constructor Details

#initialize ⇒ Ec2AddSecurityGroup

Returns a new instance of Ec2AddSecurityGroup.



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# File 'lib/awsutils/ec2addsg.rb', line 123

def initialize
  @opts = parse_opts
end

Instance Method Details

#add_rule_to_other_group(rule) ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 65

def add_rule_to_other_group(rule)
  rule['IpPermissions'].each do |r|
    r['Groups'] = [
      {
        'GroupId' => g_obj.group_id,
        'UserId' => @opts[:owner_group_id]
      }
    ]
  end

  puts 'Adding Outbound Rule: ' + rule.inspect

  connection.authorize_security_group_ingress(
    nil,
    'GroupId' => rule['dest'],
    'IpPermissions' => rule['IpPermissions']
  )
end

#add_rule_to_this_group(rule) ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 84

def add_rule_to_this_group(rule)
  rule['IpPermissions'].each do |r|
    r['Groups'] = [
      {
        'GroupId' => rule['source'],
        'UserId' => @opts[:owner_group_id]
      }
    ]
    r['dest'] = g_obj.group_id
  end

  puts 'Adding Inbound Rule: ' + rule.inspect

  connection.authorize_security_group_ingress(
    nil,
    'GroupId' => g_obj.group_id,
    'IpPermissions' => rule['IpPermissions']
  )
end

#compile_rules ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 131

def compile_rules
  rules_data = YAML.load_file(@opts[:base_rules_file])

  if @opts[:environment]
    if !rules_data['env']
      raise "Environment #{@opts[:environment]} not present in rules file" \
           " (#{@opts[:base_rules_file]})."
    else
      rules_env_data = rules_data['env'][@opts[:environment]]
    end
  elsif rules_data.class != Array
    raise 'base_rules_file is an environment-keyed file but you did ' \
      'not specify an environment.'
  else
    rules_env_data = rules_data
  end

  rules_env_data.map do |rule|
    generate_rule_hash(rule)
  end
end

#g_obj ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 8

def g_obj
  @g_obj ||= begin
    connection.security_groups.new(
      name: @opts[:security_group],
      description: @opts[:description].to_s,
      vpc_id: @opts[:vpc_id]
    )
  end
end

#generate_rule_hash(rule) ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 18

def generate_rule_hash(rule)
  if rule['source']
    if rule['dest']
      raise 'One of the predefined rules has both a source ' \
        'and a destination already defined: ' + rule.inspect
    end
    if rule['source'] !~ /\./ &&
       !current_groups.include?(rule['source'])
      raise "Group #{rule['source']} specified as part of rule: " \
           "#{rule.inspect} does not exist"
    end
  end

  if !rule['dest']
    rule['dest'] = @new_group_id
  elsif !current_groups.include?(rule['dest'])
    raise "Group #{rule['dest']} specified as part of rule: " \
         "#{rule.inspect} does not exist"
  end

  ip_permissions = {}

  ip_permissions['IpProtocol'] = rule['proto'] if rule['proto']

  if rule['port']
    ip_permissions['FromPort'] = rule['port'].first.to_s
    ip_permissions['ToPort'] = rule['port'].last.to_s
  end

  if rule['source'] =~ /\./
    ip_permissions['Groups'] = []
    ip_permissions['IpRanges'] = ['CidrIp' => rule['source']]
  elsif rule['source']
    ip_permissions['Groups'] = [
      {
        'GroupId' => rule['source'],
        'UserId' => @opts[:owner_group_id]
      }
    ]
    ip_permissions['IpRanges'] = []
  end

  rule['IpPermissions'] = [ip_permissions]

  rule
end

#name ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 127

def name
  @opts[:security_group]
end

#parse_opts ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 167

def parse_opts
  raise 'AWS_OWNER_ID is not set!' unless ENV['AWS_OWNER_ID']

  @opts = Optimist.options do
    opt :security_group,
        'New Security Group Name',
        short: 'N',
        type: String,
        required: true
    opt :vpc_id,
        'New Group VPC ID',
        short: 'v',
        type: String
    opt :base_rules_file,
        'Base rules YAML file',
        short: 'r',
        default: ENV['EC2_BASE_RULES'] || "#{ENV['HOME']}/.ec2baserules.yml"
    opt :description,
        'New Group Description',
        short: 'd',
        type: String,
        required: true
    opt :environment,
        'New Group Environment (e.g. stage/prod)',
        short: 'E',
        type: String
    opt :owner_group_id,
        'Owner Group ID',
        short: 'o',
        default: ENV['AWS_OWNER_ID']
  end
end

#run ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 153

def run
  unless File.exist?(@opts[:base_rules_file])
    puts "File #{@opts[:base_rules_file]} does not exist!"
    exit 1
  end

  if exist?
    puts "Group #{@opts[:security_group]} already exists!"
    exit 1
  end

  save(compile_rules)
end

#save(rules) ⇒ Object 



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# File 'lib/awsutils/ec2addsg.rb', line 104

def save(rules)
  g_obj.save
  puts "New group ID: #{g_obj.group_id}"

  begin
    rules.reject { |rule| rule['dest'] }.each do |rule|
      add_rule_to_this_group(rule)
    end

    # Then process the outbound rules now that we have a group_id
    rules.select { |rule| rule['dest'] }.each do |rule|
      add_rule_to_other_group(rule)
    end
  rescue StandardError => e
    connection.delete_security_group(nil, g_obj.group_id)
    raise e
  end
end