:original_name: cce_10_0277.html

.. _cce_10_0277:

Overview
========

CCE provides multiple types of add-ons to extend cluster functions and meet feature requirements. You can install add-ons as required.

.. table:: **Table 1** Add-on list

   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | Add-on Name                                                             | Introduction                                                                                                                                                                         |
   +=========================================================================+======================================================================================================================================================================================+
   | :ref:`coredns (System Resource Add-On, Mandatory) <cce_10_0129>`        | The coredns add-on is a DNS server that provides domain name resolution services for Kubernetes clusters. coredns chains plug-ins to provide additional features.                    |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`storage-driver (System Resource Add-On, Discarded) <cce_10_0127>` | storage-driver is a FlexVolume driver used to support IaaS storage services such as EVS, SFS, and OBS.                                                                               |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`everest (System Resource Add-On, Mandatory) <cce_10_0066>`        | Everest is a cloud native container storage system. Based on the Container Storage Interface (CSI), clusters of Kubernetes v1.15.6 or later obtain access to cloud storage services. |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`autoscaler <cce_10_0154>`                                         | The autoscaler add-on resizes a cluster based on pod scheduling status and resource usage.                                                                                           |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`metrics-server <cce_10_0205>`                                     | metrics-server is an aggregator for monitoring data of core cluster resources.                                                                                                       |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
   | :ref:`gpu-beta <cce_10_0141>`                                           | gpu-beta is a device management add-on that supports GPUs in containers. It supports only NVIDIA drivers.                                                                            |
   +-------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+