Module: Ohai::Mixin::GCEMetadata

Defined in:
lib/ohai/mixin/gce_metadata.rb

Instance Method Summary collapse

Instance Method Details

#fetch_metadata(id = "") ⇒ Object 



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# File 'lib/ohai/mixin/gce_metadata.rb', line 41

def fetch_metadata(id = "")
  response = http_get("#{GCE_METADATA_URL}/#{id}")
  if response.code == "200"
    json_data = parse_json(response.body)
    if json_data.nil?
      logger.warn("Mixin GCEMetadata: Metadata response is NOT valid JSON for id='#{id}'")
      if has_trailing_slash?(id) || (id == "")
        temp = {}
        response.body.split("\n").each do |sub_attr|
          temp[sanitize_key(sub_attr)] = fetch_metadata("#{id}#{sub_attr}")
        end
        temp
      else
        response.body
      end
    else
      json_data
    end
  else
    logger.warn("Mixin GCEMetadata: Received response code #{response.code} requesting metadata for id='#{id}'")
    nil
  end
end

#has_trailing_slash?(data) ⇒ Boolean

Returns is there a trailing /?.

Parameters:

Returns:

  • (Boolean) —

    is there a trailing /?



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# File 'lib/ohai/mixin/gce_metadata.rb', line 68

def has_trailing_slash?(data)
  !!( data =~ %r{/$} )
end

#http_get(uri) ⇒ Object

fetch the meta content with a timeout and the required header



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# File 'lib/ohai/mixin/gce_metadata.rb', line 32

def http_get(uri)
  conn = Net::HTTP.start(GCE_METADATA_ADDR)
  conn.read_timeout = 6
  conn.get(uri, {
                  "Metadata-Flavor" => "Google",
                  "User-Agent" => "chef-ohai/#{Ohai::VERSION}",
                })
end

#sanitize_key(key) ⇒ Object 



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# File 'lib/ohai/mixin/gce_metadata.rb', line 72

def sanitize_key(key)
  key.gsub(%r{\-|/}, "_")
end