CBA
The Controller Blueprint Archived is the overall service design, fully model-driven, package needed to automate the instantiation and any config provisioning operation, such as day0 or day2 configuration.
The CBA is .zip file, comprised of the following structure:
Code Block |
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.
├── Definitions
│ ├── blueprint.json
│ ├── artifact_types.json
│ ├── data_types.json
│ ├── node_types.json
│ ├── policy_types.json
│ ├── relationship_types.json
│ ├── resources_definition_types.json
│ └── *-mapping.json
├── Plans
│ ├── ResourceAssignment.xml
│ ├── ConfigAssign.xml
│ └── ConfigDeploy.xml
├── Scripts
│ └── python
│ ├── ConfigDeployExample.py
│ ├── ResourceResolutionExample.py
│ └── __init__.py
├── TOSCA-Metadata
│ └── TOSCA.meta
└── Templates
└── *-template.vtl |
Data Dictionary
A data dictionary defines a specifc resource that can be resolved using the bellow the supported sources.
A data dictionary can support multiple resources.
The main goal of data dictionary is to define generic entity that could be shared accross the service catalog.
Resolution sources
Input
Default
SQL
Default (SDNC DB)
Generic
REST
Default (SDNC MDSAL)
Generic
Capability (scripts)
Python
Kotlin script
Netconf (through Python)
Workflow
A workflow defines an overall action to be taken for the service; it can be composed of a set of node to execute. Currently, workflows are backed by Directed Graph engine.
A CBA can have as many workflow as needed.
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
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helm serve &
helm repo add local http://127.0.0.1:8879 |
Get the chart
Make sure to checkout the release to use, by replacing $release-tag
in bellow command
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git clone https://gerrit.onap.org/r/oom
git checkout tags/$release-tag
cd oom/kubernetes
make cds |
Install CDS
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helm install --name cds cds |
Result
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$ kubectl get all --selector=release=cds
NAME READY STATUS RESTARTS AGE
pod/cds-blueprints-processor-54f758d69f-p98c2 0/1 Running 1 2m
pod/cds-cds-6bd674dc77-4gtdf 1/1 Running 0 2m
pod/cds-cds-db-0 1/1 Running 0 2m
pod/cds-controller-blueprints-545bbf98cf-zwjfc 1/1 Running 0 2m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/blueprints-processor ClusterIP 10.43.139.9 <none> 8080/TCP,9111/TCP 2m
service/cds NodePort 10.43.254.69 <none> 3000:30397/TCP 2m
service/cds-db ClusterIP None <none> 3306/TCP 2m
service/controller-blueprints ClusterIP 10.43.207.152 <none> 8080/TCP 2m
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deployment.apps/cds-blueprints-processor 1 1 1 0 2m
deployment.apps/cds-cds 1 1 1 1 2m
deployment.apps/cds-controller-blueprints 1 1 1 1 2m
NAME DESIRED CURRENT READY AGE
replicaset.apps/cds-blueprints-processor-54f758d69f 1 1 0 2m
replicaset.apps/cds-cds-6bd674dc77 1 1 1 2m
replicaset.apps/cds-controller-blueprints-545bbf98cf 1 1 1 2m
NAME DESIRED CURRENT AGE
statefulset.apps/cds-cds-db 1 1 2m |
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:
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id | prerequisite |
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Have the HEATtemplate along with the HEATenvironment file. |
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Have the configuration template to apply on the VNF.
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...
Create and fill-in the a table for all the dynamic values
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label | instantiation |
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Here are the information to capture for each dynamic cloud parameters
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id | how to resolve |
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Value will be given as input in the request. |
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Value will be defaulted in the model. |
...
label | REST |
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Value will be resolved by sending a query to the REST system
...
Supported Auth type
...
id | auth |
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Use token based authentication
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Use basic authentication
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Use SSL basic authentication
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...
label | SQL |
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Value will be resolved by sending a SQL statement to the DB system
...
...
id | input |
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List of placeholders used for
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List of placeholders used for
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...
This is the expected result from the system, and you should know what value out of the response is of interest for you.
If it's a JSON payload, then you should think about the json path to access to value of interest.
...
Required workflows
The following workflows are contracts being 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 triggeredwhat to resolved, one input is required, that is the artifact prefix (see bellow for explanation).
...
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
...
${vnf-name}
and ${vf-module-label}
is what we call the artifact prefix, so the requirement could be seen as follow:
${artifact-prefix}-template
${artifact-prefix
...
}-mapping
template
The template has to be a resource accumulator template; that be composed of the following sections:
resource-accumulator-resolved-data: defines all the resources that can be resolved directly from the context. It expresses a direct mapping between the name of the resource and its value.
Code Block title RA resolved data collapse true "resource-accumulator-resolved-data": [ { "param-name": "service-instance-id", "param-value": "${service-instance-id}" }, { "param-name": "vnf_id", "param-value": "${vnf-id}" } ]
capability-data: defines what capability to use to create a specific resource, along with the ingredients required to invoke the capability and the output mapping.
Code Block title RA capability payload collapse true { "capability-name": "netbox-ip-assign", "key-mapping": [ { "payload": [ { "param-name": "service-instance-id", "param-value": "${service-instance-id}" }, { "param-name": "prefix-id", "param-value": "${private-prefix-id}" }, { "param-name": "vf-module-id", "param-value": "${vf-module-id}" }, { "param-name": "external_key", "param-value": "${vf-module-id}-vpg_private_ip_1" } ], "output-key-mapping": [ { "resource-name": "vpg_private_ip_1", "resource-value": "${vpg_private_ip_1}" } ] } ] }
mapping
Defines the contract of each resource to be resolved. Each placeholder in the template must have a corresponding mapping definition.
A mapping is comprised of:
- name
- required / optional
- type (support complex type)
- dictionary-name
- dictionary-source
- dependencies: this allows to make sure given resources get resolved prior the resolution of the resources defining the dependency.
The dictionary fields reference to a specific data dictionary.
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.
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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.
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Scripts using Netconf or Restconf to push configure the network element.