$ fluent-gem install fluent-plugin-hipchat

<match hipchat>
  @type hipchat
  api_token XXX
  default_room my_room
  default_from fluentd
  default_color yellow
  default_notify 0
  default_format html
  default_timeout 3  # HipChat API Request Timeout Seconds (default 3)
  key_name message
  
  # proxy settings
  # http_proxy_host localhost
  # http_proxy_port 8080
  # http_proxy_user username
  # http_proxy_pass password
</match>

fluent_logger.post('hipchat', {
  :from     => 'alice',
  :message  => 'Hello<br>World!',
  :color    => 'red',
  :room     => 'my_room',
  :notify   => 1,
  :format   => 'text',
})

# set topic
fluent_logger.post('hipchat', {
  :from     => 'alice',
  :topic    => 'new topic',
  :room     => 'my_room',
})