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.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
.. Copyright (c) 2019 Intel, Inc.
=================================================
MultiCloud for k8s HPA Discovery And Registration
=================================================
Discover HPA capability and register it to A&AI
Problem Description
===================
Kubernetes clusters using ONAP Multicloud K8s Plugin Project for R4/R5 do not report hardware
features to A&AI. Consequently during the CNF/VNF life cycle CNFs/VNFs that require or recommend
specific hardware during instantiation cannot dynamically reach the correct cluster and node that
provides the needed hardware capabilities.
Propose Change
==============
Cluster Registration FLOW
-------------------------
#. Cluster is deployed.
#. K8s registration agent is deployed on cluster.
#. K8s registration agent gathers features and cluster info.
#. K8s registration agent registers with K8s scheduler with labels identifying it's capabilities.
#. K8s Scheduler hook gives HPA Placement Plugin hardware features.
#. HPA Placement Plugins stores features in mongoDB.
AAI Registration
----------------
#. CLI registers cluster with K8s plugin.
#. Registration asks HPA Placement for cluster features.
#. HPA Placement gets cluster features from mongoDB.
#. HPA Placement plugin returns map of nodes/features to registration.
#. Registration module munges features into tenant/flavors updates AAI.
Converting node feature label to flavor properties
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Node feature label::
feature.node.kubernetes.io/network-sriov.capable=True
feature.node.kubernetes.io/network-sriov.configured=True
feature.node.kubernetes.io/pci-1200_8086.present=True
Comments: The other parameter we can set default because node feature label can not provide.
Flavor properties::
+-----------------------------------------------------+-------------+
| Field | Value |
+-----------------------------------------------------+-------------+
| OS-FLV-DISABLED:disabled | False |
| OS-FLV-DISABLED:ephemeral | 0 |
| feature.node.kubernetes.io/network-sriov.capable | True |
| feature.node.kubernetes.io/network-sriov.configured | True |
| feature.node.kubernetes.io/pci-1200_8086.present | True |
| disk | 1 |
| id | 1 |
| name | k8s_sriov_1 |
| ram | 512 |
| vcpus | 1 |
+-----------------------------------------------------+-------------+
Add API for K8s Plugin
^^^^^^^^^^^^^^^^^^^^^^
API V0 URL: POST http://{{MSB_IP}}:{{MSB_PORT}}/api/v0/multicloud-k8s/{{cloud-owner}}_{{cloud-region-id}}/registry
API V1 URL: POST http://{{MSB_IP}}:{{MSB_PORT}}/api/v1/multicloud-k8s/{{cloud-owner}}/{{cloud-region-id}}/registry
Request Body:
>>>>>>>>>>>>>
::
{
}
Response:
>>>>>>>>>
Response Codes
::::::::::::::
Success
.......
+--------------------+----------------------------------------------------------------------+
| Code | Reason |
+====================+======================================================================+
| 202 - ACCEPTED | Discover HPA and successfully register it |
+--------------------+----------------------------------------------------------------------+
Error
.....
+----------------------------+--------------------------------------------------------------+
| Code | Reason |
+============================+==============================================================+
| 500 - INTERAL_SERVER_ERROR | Some content in the request was invalid. |
+----------------------------+--------------------------------------------------------------+
Response Body
:::::::::::::
::
{
}
API V0 URL: GET http://{{MSB_IP}}:{{MSB_PORT}}/api/v0/multicloud-k8s/{{cloud-owner}}_{{cloud-region-id}}/registry
API V1 URL: GET http://{{MSB_IP}}:{{MSB_PORT}}/api/v1/multicloud-k8s/{{cloud-owner}}/{{cloud-region-id}}/registry
Request Body:
>>>>>>>>>>>>>
::
{
}
Response:
>>>>>>>>>
Response Codes
::::::::::::::
Success
.......
+--------------------+----------------------------------------------------------------------+
| Code | Reason |
+====================+======================================================================+
| 202 - ACCEPTED | Discover HPA and successfully register it |
+--------------------+----------------------------------------------------------------------+
Error
.....
+----------------------------+--------------------------------------------------------------+
| Code | Reason |
+============================+==============================================================+
| 500 - INTERAL_SERVER_ERROR | Some content in the request was invalid. |
+----------------------------+--------------------------------------------------------------+
Response Body
:::::::::::::
::
{
}
API V0 URL: DELETE http://{{MSB_IP}}:{{MSB_PORT}}/api/v0/multicloud-k8s/{{cloud-owner}}_{{cloud-region-id}}/registry
API V1 URL: DELETE http://{{MSB_IP}}:{{MSB_PORT}}/api/v1/multicloud-k8s/{{cloud-owner}}/{{cloud-region-id}}/registry
Request Body:
>>>>>>>>>>>>>
::
{
}
Response:
>>>>>>>>>
Response Codes
::::::::::::::
Success
.......
+--------------------+----------------------------------------------------------------------+
| Code | Reason |
+====================+======================================================================+
| 204 - NO_CONTENT | Successfully delete HPA information from AAI |
+--------------------+----------------------------------------------------------------------+
Error
.....
+----------------------------+--------------------------------------------------------------+
| Code | Reason |
+============================+==============================================================+
| 500 - INTERAL_SERVER_ERROR | Some content in the request was invalid. |
+----------------------------+--------------------------------------------------------------+
Response Body
:::::::::::::
::
{
}
Work Items
==========
#. Work with CLI.
#. Work with AAI.
#. Expose API by broker and k8s plugin.
Tests
=====
#. Unit Tests with tox
#. Pairwise test with AAI project.
#. Integration test with vFW HPA test.
#. CSIT Tests, the input/ouput of broker and k8s plugin see API design above.
Reference
=========
https://wiki.onap.org/display/DW/Extending+HPA+for+K8S
|
