.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
.. Copyright (C) 2021-2024 Nordix Foundation
.. Modifications Copyright (C) 2021 Bell Canada.

.. DO NOT CHANGE THIS LABEL FOR RELEASE NOTES - EVEN THOUGH IT GIVES A WARNING
.. _deployment:

CPS Deployment
##############

.. contents::
    :depth: 2

Database configuration
======================
CPS uses PostgreSQL database. As per the `PostgreSQL documentation on resource consumption
<https://www.postgresql.org/docs/current/runtime-config-resource.html#GUC-SHARED-BUFFERS>`_, the *shared_buffers*
parameter should be set between 25% and 40% of total memory. It has a default value of 128 megabytes, so this should be
set appropriately. For example, given a database with 2GB of memory, 512MB is a recommended value.

CPS and NCMP Configuration
==========================

JVM Memory Allocation

Allocating 75% of the container's memory to the JVM heap ensures efficient memory management.
This helps the JVM make the best use of the allocated resources while leaving enough memory for other processes.

.. code-block:: yaml

    JAVA_TOOL_OPTIONS: "-XX:InitialRAMPercentage=75.0 -XX:MaxRAMPercentage=75.0"

Load balancer configuration
===========================

For optimal performance in CPS/NCMP, load balancers should be configured to use a least-requests policy, also known as
least-connected. Use of round-robin load balancing can lead to instability.

CPS OOM Charts
==============
The CPS kubernetes chart is located in the `OOM repository <https://github.com/onap/oom/tree/master/kubernetes/cps>`_.
This chart includes different cps components referred as <cps-component-name> further in the document are listed below:

.. container:: ulist

  - `cps-core <https://github.com/onap/oom/tree/master/kubernetes/cps/components/cps-core>`__
  - `ncmp-dmi-plugin <https://github.com/onap/oom/tree/master/kubernetes/cps/components/ncmp-dmi-plugin>`__

Please refer to the `OOM documentation <https://docs.onap.org/projects/onap-oom/en/latest/sections/guides/user_guides/oom_user_guide.html>`_ on how to install and deploy ONAP.

Installing or Upgrading CPS Components
======================================

The assumption is you have cloned the charts from the OOM repository into a local directory.

**Step 1** Go to the cps charts and edit properties in values.yaml files to make any changes to particular cps component if required.

.. code-block:: bash

  cd oom/kubernetes/cps/components/<cps-component-name>

**Step 2** Build the charts

.. code-block:: bash

  cd oom/kubernetes
  make SKIP_LINT=TRUE cps

.. note::
   SKIP_LINT is only to reduce the "make" time

**Step 3** Undeploying already deployed cps components

After undeploying cps components, keep monitoring the cps pods until they go away.

.. code-block:: bash

  helm del --purge <my-helm-release>-<cps-component-name>
  kubectl get pods -n <namespace> | grep <cps-component-name>

**Step 4** Make sure there is no orphan database persistent volume or claim.

First, find if there is an orphan database PV or PVC with the following commands:

.. note::
   This step does not apply to ncmp-dmi-plugin.

.. code-block:: bash

  kubectl get pvc -n <namespace> | grep <cps-component-name>
  kubectl get pv -n <namespace> | grep <cps-component-name>

If there are any orphan resources, delete them with

.. code-block:: bash

    kubectl delete pvc <orphan-cps-core-pvc-name>
    kubectl delete pv <orphan-cps-core-pv-name>

**Step 5** Delete NFS persisted data for CPS components

Connect to the machine where the file system is persisted and then execute the below command

.. code-block:: bash

  rm -fr /dockerdata-nfs/<my-helm-release>/<cps-component-name>

**Step 6** Re-Deploy cps pods

After deploying cps, keep monitoring the cps pods until they come up.

.. code-block:: bash

  helm deploy <my-helm-release> local/cps --namespace <namespace>
  kubectl get pods -n <namespace> | grep <cps-component-name>

Restarting a faulty component
=============================
Each cps component can be restarted independently by issuing the following command:

.. code-block:: bash

    kubectl delete pod <cps-component-pod-name> -n <namespace>

.. Below Label is used by documentation for other CPS components to link here, do not remove even if it gives a warning
.. _cps_common_credentials_retrieval:

Credentials Retrieval
=====================

Application and database credentials are kept in Kubernetes secrets. They are defined as external secrets in the
values.yaml file to be used across different components as :

.. container:: ulist

  - `cps-core <https://github.com/onap/oom/blob/master/kubernetes/cps/components/cps-core/values.yaml>`_
  - `ncmp-dmi-plugin <https://github.com/onap/oom/blob/master/kubernetes/cps/components/ncmp-dmi-plugin/values.yaml>`_

Below are the list of secrets for different cps components.

+--------------------------+---------------------------------+---------------------------------------------------+
| Component                | Secret type                     | Secret Name                                       |
+==========================+=================================+===================================================+
| cps-core                 | Database authentication         | <my-helm-release>-cps-core-pg-user-creds          |
+--------------------------+---------------------------------+---------------------------------------------------+
| cps-core                 | Rest API Authentication         | <my-helm-release>-cps-core-app-user-creds         |
+--------------------------+---------------------------------+---------------------------------------------------+
| ncmp-dmi-plugin          | Rest API Authentication         | <my-helm-release>-cps-dmi-plugin-user-creds       |
+--------------------------+---------------------------------+---------------------------------------------------+
| ncmp-dmi-plugin          | SDNC authentication             | <my-helm-release>-ncmp-dmi-plugin-sdnc-creds      |
+--------------------------+---------------------------------+---------------------------------------------------+

The credential values from these secrets are configured in running container as environment variables. Eg:
`cps core deployment.yaml <https://github.com/onap/oom/blob/master/kubernetes/cps/components/cps-core/templates/deployment.yaml>`_

If no specific passwords are provided to the chart as override values for deployment, then passwords are automatically
generated when deploying the Helm release. Below command can be used to retrieve application property credentials

.. code::

  kubectl get secret <my-helm-release>-<secret-name> -n <namespace> -o json | jq '.data | map_values(@base64d)'

.. note::
   base64d works only with jq version 1.6 or above.

CPS Core Pods
=============
To get a listing of the cps-core Pods, run the following command:

.. code-block:: bash

  kubectl get pods -n <namespace> | grep cps-core

  dev-cps-core-ccd4cc956-r98pv                          1/1     Running            0          24h
  dev-cps-core-postgres-primary-f7766d46c-s9d5b         1/1     Running            0          24h
  dev-cps-core-postgres-replica-84659d68f9-6qnt4        1/1     Running            0          24h

.. note::
    The CPS Service will have to be restarted each time a change is made to a configurable property.

Additional CPS-Core Customizations
==================================

The following table lists some properties that can be specified as Helm chart
values to configure the application to be deployed. This list is not exhaustive.

Any spring supported property can be configured by providing in ``config.additional.<spring-supported-property-name>: value`` Example: config.additional.spring.datasource.hikari.maximumPoolSize: 30

+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| Property                                  | Description                                                                                             | Default Value                 |
+===========================================+=========================================================================================================+===============================+
| config.appUserName                        | User name used by cps-core service to configure the authentication for REST API it exposes.             | ``cpsuser``                   |
|                                           |                                                                                                         |                               |
|                                           | This is the user name to be used by cps-core REST clients to authenticate themselves.                   |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.appUserPassword                    | Password used by cps-core service to configure the authentication for REST API it exposes.              | Not defined                   |
|                                           |                                                                                                         |                               |
|                                           | If not defined, the password is generated when deploying the application.                               |                               |
|                                           |                                                                                                         |                               |
|                                           | See also :ref:`cps_common_credentials_retrieval`.                                                       |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| postgres.config.pgUserName                | Internal user name used by cps-core to connect to its own database.                                     | ``cps``                       |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| postgres.config.pgUserPassword            | Internal password used by cps-core to connect to its own database.                                      | Not defined                   |
|                                           |                                                                                                         |                               |
|                                           | If not defined, the password is generated when deploying the application.                               |                               |
|                                           |                                                                                                         |                               |
|                                           | See also :ref:`cps_common_credentials_retrieval`.                                                       |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| postgres.config.pgDatabase                | Database name used by cps-core                                                                          | ``cpsdb``                     |
|                                           |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| logging.level                             | Logging level set in cps-core                                                                           | info                          |
|                                           |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.useStrimziKafka                    | If targeting a custom kafka cluster, i.e. useStrimziKafka: false, the                                   | true                          |
|                                           | config.eventPublisher.spring.kafka values below must be set.                                            |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka hostname and port                                                                                 | ``<kafka-bootstrap>:9092``    |
| spring.kafka.bootstrap-servers            |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka consumer client id                                                                                | ``cps-core``                  |
| spring.kafka.consumer.client-id           |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security protocol.                                                                                | ``SASL_PLAINTEXT``            |
| spring.kafka.security.protocol            | Some possible values are:                                                                               |                               |
|                                           |                                                                                                         |                               |
|                                           | * ``PLAINTEXT``                                                                                         |                               |
|                                           | * ``SASL_PLAINTEXT``, for authentication                                                                |                               |
|                                           | * ``SASL_SSL``, for authentication and encryption                                                       |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL mechanism. Required for SASL_PLAINTEXT and SASL_SSL protocols.                      | Not defined                   |
| spring.kafka.properties.                  | Some possible values are:                                                                               |                               |
| sasl.mechanism                            |                                                                                                         |                               |
|                                           | * ``PLAIN``, for PLAINTEXT                                                                              |                               |
|                                           | * ``SCRAM-SHA-512``, for SSL                                                                            |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL JAAS configuration. Required for SASL_PLAINTEXT and SASL_SSL protocols.             | Not defined                   |
| spring.kafka.properties.                  | Some possible values are:                                                                               |                               |
| sasl.jaas.config                          |                                                                                                         |                               |
|                                           | * ``org.apache.kafka.common.security.plain.PlainLoginModule required username="..." password="...";``,  |                               |
|                                           |   for PLAINTEXT                                                                                         |                               |
|                                           | * ``org.apache.kafka.common.security.scram.ScramLoginModule required username="..." password="...";``,  |                               |
|                                           |   for SSL                                                                                               |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL SSL store type. Required for SASL_SSL protocol.                                     | Not defined                   |
| spring.kafka.ssl.trust-store-type         | Some possible values are:                                                                               |                               |
|                                           |                                                                                                         |                               |
|                                           | * ``JKS``                                                                                               |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL SSL store file location. Required for SASL_SSL protocol.                            | Not defined                   |
| spring.kafka.ssl.trust-store-location     |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL SSL store password. Required for SASL_SSL protocol.                                 | Not defined                   |
| spring.kafka.ssl.trust-store-password     |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.eventPublisher.                    | Kafka security SASL SSL broker hostname identification verification. Required for SASL_SSL protocol.    | Not defined                   |
| spring.kafka.properties.                  | Possible value is:                                                                                      |                               |
| ssl.endpoint.identification.algorithm     |                                                                                                         |                               |
|                                           | * ``""``, empty string to disable                                                                       |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Core pool size in asynchronous execution of notification.                                               | ``2``                         |
| notification.async.executor.              |                                                                                                         |                               |
| core-pool-size                            |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Max pool size in asynchronous execution of notification.                                                | ``1``                         |
| notification.async.executor.              |                                                                                                         |                               |
| max-pool-size                             |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Queue Capacity in asynchronous execution of notification.                                               | ``500``                       |
| notification.async.executor.              |                                                                                                         |                               |
| queue-capacity                            |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | If the executor should wait for the tasks to be completed on shutdown                                   | ``true``                      |
| notification.async.executor.              |                                                                                                         |                               |
| wait-for-tasks-to-complete-on-shutdown    |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Prefix to be added to the thread name in asynchronous execution of notifications.                       | ``Async-``                    |
| notification.async.executor.              |                                                                                                         |                               |
| thread-name-prefix                        |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Maximum time allowed by the thread pool executor for execution of one of the threads in milliseconds.   | ``60000``                     |
| notification.async.executor.              |                                                                                                         |                               |
| time-out-value-in-ms                      |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.                        | Specifies number of database connections between database and application.                              | ``10``                        |
| spring.datasource.hikari.                 | This property controls the maximum size that the pool is allowed to reach,                              |                               |
| maximumPoolSize                           | including both idle and in-use connections.                                                             |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+

.. _additional-cps-ncmp-customizations:

Additional CPS-NCMP Customizations
==================================
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.dmiPluginUserName                  | User name used by cps-core to authenticate themselves for using ncmp-dmi-plugin service.                | ``dmiuser``                   |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.dmiPluginUserPassword              | Internal password used by cps-core to connect to ncmp-dmi-plugin service.                               | Not defined                   |
|                                           |                                                                                                         |                               |
|                                           | If not defined, the password is generated when deploying the application.                               |                               |
|                                           |                                                                                                         |                               |
|                                           | See also :ref:`cps_common_credentials_retrieval`.                                                       |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.ncmp.timers                        | Specifies the delay in milliseconds in which the module sync watch dog will wake again after finishing. | ``5000``                      |
| .advised-modules-sync.sleep-time-ms       |                                                                                                         |                               |
|                                           |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.ncmp.timers                        | Specifies the delay in milliseconds in which the data sync watch dog will wake again after finishing.   | ``30000``                     |
| .cm-handle-data-sync.sleep-time-ms        |                                                                                                         |                               |
|                                           |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.ncmp.dmi.httpclient     | Specifies the maximum time in seconds, to wait for establishing a connection for the HTTP Client.       | ``30``                        |
| .connectionTimeoutInSeconds               |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.ncmp.dmi.httpclient     | Specifies the maximum number of connections allowed per route in the HTTP client.                       | ``50``                        |
| .maximumConnectionsPerRoute               |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.ncmp.dmi.httpclient     | Specifies the maximum total number of connections that can be held by the HTTP client.                  | ``100``                       |
| .maximumConnectionsTotal                  |                                                                                                         |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+
| config.additional.ncmp.dmi.httpclient     | Specifies the duration in seconds for the threshold, after which idle connections will be evicted       | ``5``                         |
| .idleConnectionEvictionThresholdInSeconds | from the connection pool by the HTTP client.                                                            |                               |
+-------------------------------------------+---------------------------------------------------------------------------------------------------------+-------------------------------+

CPS-Core Docker Installation
============================

CPS-Core can also be installed in a docker environment. Latest `docker-compose <https://github.com/onap/cps/blob/master/docker-compose/docker-compose.yml>`_ is included in the repo to start all the relevant services.
The latest instructions are covered in the `README <https://github.com/onap/cps/blob/master/docker-compose/README.md>`_.

.. Below Label is used by documentation for other CPS components to link here, do not remove even if it gives a warning
.. _cps_common_distributed_datastructures:

NCMP Distributed Data Structures
================================

NCMP utilizes embedded distributed data structures to replicate state across various instances, ensuring low latency and high performance. Each JVM runs a Hazelcast instance to manage these data structures. To facilitate member visibility and cluster formation, an additional port (defaulting to 5701) must be available.

Below are the list of distributed datastructures that we have.

+--------------+------------------------------------+-----------------------------------------------------------+
| Component    | Data Structure Name                |                 Use                                       |
+==============+====================================+===========================================================+
| cps-ncmp     | moduleSyncStartedOnCmHandles       | Watchdog process to register cm handles.                  |
+--------------+------------------------------------+-----------------------------------------------------------+
| cps-ncmp     | dataSyncSemaphores                 | Watchdog process to sync data from the nodes.             |
+--------------+------------------------------------+-----------------------------------------------------------+
| cps-ncmp     | moduleSyncWorkQueue                | Queue used internally for workers to pick the task.       |
+--------------+------------------------------------+-----------------------------------------------------------+
| cps-ncmp     | trustLevelPerCmHandle              | Stores the trust level per cm handle id                   |
+--------------+------------------------------------+-----------------------------------------------------------+
| cps-ncmp     | trustLevelPerDmiPlugin             | Stores the trust level for the dmi-plugins.               |
+--------------+------------------------------------+-----------------------------------------------------------+
| cps-ncmp     | cmNotificationSubscriptionCache    | Stores and tracks cm notification subscription requests.  |
+--------------+------------------------------------+-----------------------------------------------------------+

Total number of caches : 6