This guide is geared to provide information regarding how to do service design to automate instantiation and day0 configuration.
Installation
ONAP is meant to be deployed within a Kubernetes environment. Hence, the de-facto way to deploy CDS is through Kubernetes.
ONAP also package Kubernetes manifest as Chart, using Helm.
Prerequisite
https://docs.onap.org/en/latest/guides/onap-developer/settingup/index.html
Setup local Helm
Get the chart
Make sure to checkout the release to use, by replacing $release-tag
in bellow command
Install CDS
Result
Design time
Bellow are the requirements to enable automation for a service within ONAP.
For instantiation, the goal is to be able to automatically resolve all the HEAT environment variables, called cloud parameters.
For post-instantiation, the goal is to configure the VNF with initial configuration.
Prerequisite
Gather what you need:
- Identify which values are static and dynamic
Create and fill-in the a table for all the dynamic values
Here are the information to capture for each dynamic cloud parameters
Data dictionary
Required workflows
The following workflows are contracts established between SO, SDNC and CDS to cover the instantiation and the post-instantiation use cases.
resource-assignment
This action is meant to assign resources needed to instantiate the service. The goal is to resolved all the HEAT environment variables.
This action is triggered by Generic-Resource-API (GR-API) within SDNC as part of the AssignBB orchestrated by SO. Hence it will be triggered for each VNF(s) and VF-Module(s).
In order to know for which entity the action is triggered, one input is required, that is the artifact prefix (see bellow for explanation).
artifacts
For each VNF and VF-Module comprising the service, a combinaison of a template and mapping is needed.
The requirement is as follow for VNF:
${vnf-name}-template
${vnf-name}-mapping
and as follow for VF-Module, where the vf-module-label
is actually the name of the HEAT template file.
${vf-module-label}-template
${vf-module-label}-mapping
${vnf-name}
and ${vf-module-label}
is what we call the artifact prefix.
template
The template has to be a resource accumulator template; that be composed of the following sections:
resource-accumulator-resolved-data: defines all the resources that can be resolved directly from the context. It expresses a direct mapping between the name of the resource and its value.
capability-data: defines what capability to use to create a specific resource, along with the ingredients required to invoke the capability and the output mapping.
scripts
If any of the mapping uses a source capabbility to resolve a parameters.
config-assign
This action is meant to assign all the resources and mesh the templates needed for the configuration to apply post-instantiation.
This action is triggered by SO during after the AssignBB has been executed for Service, VNF and VF-Module.
artifacts
Combinaison of templates with respective mappings
Scripts if needed
config-deploy
This action is meant to push the configuration templates defined during the config-assign step for the post-instantiation.
This action is triggered by SO during after the CreateBB has been executed for all the VF-Modules.
artifacts
Combinaison of templates with respective mappings
Scripts using Netconf or Restconf to push configure the network element