Class: Ec2UltraDNSUpdater::CLI

Inherits:
Object
  • Object
show all
Defined in:
lib/ec2_ultradns_updater/cli.rb

Class Method Summary collapse

Class Method Details

.configure_logger(opts) ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 58

def self.configure_logger(opts)
  if opts[:log_to]
    @logger = ::Logger.new(opts[:log_to])
  end
  @logger ||= ::Logger.new(STDOUT)

  @logger.level = opts[:verbose] ? Logger::DEBUG : Logger::INFO
  
  opts[:aws][:logger] = @logger if opts[:aws]
  opts[:ultradns][:logger] = @logger if opts[:ultradns]
  
  opts
end

.load_config(opts, filename) ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 52

def self.load_config(opts, filename)
  config = symbolize_keys(YAML.load_file(filename))
  # merge the new file config & update the logger config
  configure_logger(opts.merge!(config))
end

.parse(args) ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 72

def self.parse(args)
  options = {}
  options[:aws] = {}
  options[:ultradns] = {}
  options[:log_to] = nil
  options[:verbose] = false
  options[:out] = ''
  options[:config] = nil
  
  opts = OptionParser.new do |opts|
    opts.banner = "Usage: ec2_ultradns_updater [options]"

    opts.separator ""
    opts.separator "Specific options:"

    opts.on("-c", "--config config.yaml",
            "Configuration for the updater") do |config|
      options[:config] = config
    end
    
    opts.on("-o", "--out filename", "Write out the name assigned") do |out|
      options[:out] = out
    end
    
    opts.separator ""

    opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
      options[:verbose] = v
    end

    opts.on_tail("-h", "--help", "Show this message") do
      puts opts
      exit
    end

    opts.on_tail("--version", "Show version") do
      puts Ec2UltraDNSUpdater::VERSION
      exit
    end
  end

  opts.parse!(args)
  # load the config
  load_config(options, options[:config])
end

.run ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 22

def self.run  
  opts = parse(ARGV)
  
  ec2 = Ec2UltraDNSUpdater::Ec2.new(opts[:aws])
  ultradns = Ec2UltraDNSUpdater::UltraDNS.new(opts[:ultradns])
  name_tag_value = ec2.get_name_tag
  
  result = false
  if ec2.get_instance_public_hostname != ''
    result = ultradns.create_or_update_cname(name_tag_value, ec2.get_instance_public_hostname)
  else
    # try using an ip that reaches the internet
    result = ultradns.create_or_update_a(name_tag_value, Ec2UltraDNSUpdater::IpInfo.local_ipv4)
  end
  
  if !result
    error_text = "Error Creating or Updating CNAME for #{ec2.get_instance_public_hostname} to #{name_tag_value}"
    @logger.error error_text
    ::Logger.new(STDERR).error error_text
  elsif !opts[:out].empty?
    write_hostname(opts[:out], name_tag_value)
  end
end

.symbolize_keys(hash) ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 118

def self.symbolize_keys(hash)
  unless hash.nil?
    hash.replace(
      hash.each_key.inject({}) do |h, k|
        v = hash.delete(k)
        key = k.to_sym rescue k
        if v.is_a? (Hash)
          h[key] = symbolize_keys(v)
        else
          h[key] = v
        end
        h
      end
    )
  end
  hash
end

.write_hostname(filename, hostname) ⇒ Object 



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# File 'lib/ec2_ultradns_updater/cli.rb', line 46

def self.write_hostname(filename, hostname)
  File.open(filename, "w+") do |f|
    f.write(hostname)
  end
end