This wiki describes how to deploy the NONRTRIC components within Kubernetes cluster.

NONRTRIC Architecture

NONRTRIC comprises several components,

1. Control Panel
2. Policy Management Service
3. Information Coordinator Service
4. Non RT RIC Gateway (reuse of existing kong proxy is also possible)
5. R-App catalogue Service
6. NearRT RIC Simulator (3 A1 interface versions)
7. A1 Controller (currently using SDNC from ONAP)
8. Helm Manager
9. Dmaap Adapter Service
10. Dmaap Mediator Service
11. Use Case rApp O-DU Slice Assurance
12. Use Case rAPP O-RU Closed loop recovery

In the IT/Dep repo, there are helm charts for each these components. In addition, there is a chart called nonrtric, which is a composition of the components above.

Preparations

Download the the it/dep repository. At time of writing (Dec 2021) there is no branch for e-release so cloning can be made from master.  Pls check if the branch exist before cloning from master.

git clone "https://gerrit.o-ran-sc.org/r/it/dep" -b e-release

or 

git clone "https://gerrit.o-ran-sc.org/r/it/dep"

Configuration of components to install

It is possible to configure which of nonrtric components to install, including the controller and a1 simulators. This configuration is made in the override for the helm package. Edit the following file

<editor> dep/RECIPE_EXAMPLE/NONRTRIC/example_recipe.yaml 

The file shown below is a snippet from the override example_recipe.yaml.

All parameters beginning with 'install' can be configured 'true' for enabling installation and 'false' for disabling installation.

For the parameters installNonrtricgateway and installKong, only one can be enabled.

There are many other parameters in the file that may require adaptation to fit a certain environment. For example hostname, namespace and port to message router etc. These integration details are not covered in this guide.  

nonrtric:
  installPms: true
  installA1controller: true
  installA1simulator: true
  installControlpanel: true
  installInformationservice: true
  installRappcatalogueservice: true
  installNonrtricgateway: true
  installKong: false
  installDmaapadapterservice: true
  installDmaapmediatorservice: true
  installHelmmanager: true
  installOruclosedlooprecovery: true
  installOdusliceassurance: true
  volume1:
    # Set the size to 0 if you do not need the volume (if you are using Dynamic Volume Provisioning)
    size: 2Gi
    storageClassName: pms-storage
  volume2:
     # Set the size to 0 if you do not need the volume (if you are using Dynamic Volume Provisioning)
    size: 2Gi
    storageClassName: ics-storage
  volume3:
    size: 1Gi
    storageClassName: helmmanager-storage

...
...
...

Installation

There is a script that packs and installs the components by using the helm command.  The installation uses a values override file like the one shown above. This example can be run like this:

sudo dep/bin/deploy-nonrtric -f dep/nonrtric/RECIPE_EXAMPLE/example_recipe.yaml

Result of the installation

The installation will create one helm release and all created kubernetes objects will be put in a namespace. This name is 'nonrtric' and cannot be changed.

Once the installation is done you can check the created kubernetes objects by using command kubectl.
Example : Deployed pods when all components are enabled:

>sudo kubectl get po -n nonrtric 
NAME                                     READY   STATUS    RESTARTS   AGE
a1-sim-osc-0                             1/1     Running   0          12m
a1-sim-osc-1                             1/1     Running   0          10m
a1-sim-std-0                             1/1     Running   0          12m
a1-sim-std-1                             1/1     Running   0          10m
a1-sim-std2-0                            1/1     Running   0          12m
a1-sim-std2-1                            1/1     Running   0          3m57s
a1controller-64c5b7fc56-hjx6l            1/1     Running   0          12m
controlpanel-6bf7c4bf79-m6hgl            1/1     Running   0          12m
db-76d79cd769-mngm4                      1/1     Running   0          12m
dmaapadapterservice-0                    1/1     Running   0          12m
dmaapmediatorservice-0                   1/1     Running   0          12m
helmmanager-0                            1/1     Running   0          12m
informationservice-0                     1/1     Running   0          12m
nonrtricgateway-677988d5c7-rfm88         1/1     Running   0          12m
odusliceassurance-cd5b6f568-q89r5        1/1     Running   0          12m
oruclosedlooprecovery-568f867b45-b6zld   1/1     Running   0          12m
policymanagementservice-0                1/1     Running   0          12m
rappcatalogueservice-687d69756c-lvwrg    1/1     Running   0          12m

Un-installation

There is a script that uninstalls installs the NonRT RIC components. It is simply run like this:

sudo dep/bin/undeploy-nonrtric

Introduction to Helm Chart

In NONRTRIC we use Helm chart as a packaging manager for kubernetes. Helm chart helps developer to package, configure & deploy the application and services into kubernetes environment.

For more information you could refer to below links,

https://helm.sh/docs/intro/quickstart/