.. This work is licensed under a Creative Commons Attribution 4.0 International
.. License.http://creativecommons.org/licenses/by/4.0
.. (c) Xuan Jia (China Mobile)

================================================
OpenRetriever Gap Analysis with Kubernetes v1.5
================================================

This section provides users with OpenRetriever gap analysis regarding feature
requirement with Kubernetes Official Release. The following table lists the use
cases / feature requirements of container integrated functionality, and its gap
analysis with Kubernetes Official Release.

.. table::
  :class: longtable

  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |Use Case / Requirement                                     |Supported in v1.5  |Notes                                                                                                |
  +===========================================================+===================+=====================================================================================================+
  |Manage conainter and virtual machine in the same platform. |No                 | There are some ways how Kubernetes could manage VM-s:                                               |
  |                                                           |                   |                                                                                                     |
  |                                                           |                   | 1. `Kubevirt <https://github.com/kubevirt/kubevirt>`_                                               |
  |                                                           |                   | 2. Kubernetes can start rkt and with                                                                |
  |                                                           |                   |    `rkt it is possible to start VM-s <https://coreos.com/rkt/docs/latest/running-kvm-stage1.html>`_ |
  |                                                           |                   | 3. `Virtlet <https://github.com/Mirantis/virtlet>`_                                                 |
  |                                                           |                   | 4. `Hypercontainer <https://github.com/kubernetes/frakti>`_                                         |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |Kubernetes support multiple networks.                      |No                 | As VNF needs at least three interfaces. Management,control plane, data plane. `CNI                  |
  |                                                           |                   | <https://github.com/containernetworking/cni/blob/master/SPEC.md>`_ already supports multiple        |
  |                                                           |                   | interfaces in the API definition.                                                                   |
  |                                                           |                   |                                                                                                     |
  |                                                           |                   | 1. `Multus <https://github.com/Intel-Corp/multus-cni>`_                                             |
  |                                                           |                   | 2. `CNI-Genie <https://github.com/Huawei-PaaS/CNI-Genie>`_                                          |
  |                                                           |                   | 3. A `solution built into Kubernetes                                                                |
  |                                                           |                   |    <https://docs.google.com/document/d/1TW3P4c8auWwYy-w_5afIPDcGNLK3LZf0m14943eVfVg/>`_             |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |Kubernetes support NAT-less connections to a container     |No                 | SIP/SDP and SCTP are not working with NAT-ed networks                                               |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |Kubernetes scheduling support CPU binding，NUMA features   |No                 | The kubernetes schedular don't support these features                                               |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |DPDK need to support CNI                                   |No                 | DPDK is the technology to accelerate the data plane. Container need                                 |
  |                                                           |                   | support it, the same with virtual machine.                                                          |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+
  |SR-IOV can support CNI (Optional)                          |No                 | SR-IOV could let container get high performance                                                     |
  +-----------------------------------------------------------+-------------------+-----------------------------------------------------------------------------------------------------+