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draft-ietf-nmop-yang-message-broker-integration-06.txt
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NMOP T. Graf
Internet-Draft A. Elhassany
Intended status: Informational Swisscom
Expires: 10 August 2025 6 February 2025
An Architecture for YANG-Push to Message Broker Integration
draft-ietf-nmop-yang-message-broker-integration-06
Abstract
This document describes the motivation and architecture of a native
YANG-Push notifications and YANG Schema integration into a Message
Broker and YANG Schema Registry.
Discussion Venues
This note is to be removed before publishing as an RFC.
Discussion of this document takes place on the Operations and
Management Area Working Group Working Group mailing list
([email protected]), which is archived at
https://mailarchive.ietf.org/arch/browse/nmop/.
Source for this draft and an issue tracker can be found at
https://github.com/network-analytics/draft-daisy-kafka-yang-
integration/.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 10 August 2025.
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Copyright Notice
Copyright (c) 2025 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Origins of YANG-Push . . . . . . . . . . . . . . . . . . 3
1.2. Origins of Apache Kafka . . . . . . . . . . . . . . . . . 4
1.3. Document Scope . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 4
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
3. Motivation . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1. Automatic Onboarding . . . . . . . . . . . . . . . . . . 6
3.2. Preserve Schema . . . . . . . . . . . . . . . . . . . . . 6
3.3. Preserve Semantic Information . . . . . . . . . . . . . . 6
3.4. Standardize Data Processing Integration . . . . . . . . . 7
4. Elements of the Architecture . . . . . . . . . . . . . . . . 7
4.1. YANG-Push Subscription . . . . . . . . . . . . . . . . . 9
4.2. YANG-Push Publisher . . . . . . . . . . . . . . . . . . . 11
4.3. YANG-Push Receiver . . . . . . . . . . . . . . . . . . . 15
4.4. YANG Schema Registry . . . . . . . . . . . . . . . . . . 15
4.5. YANG Message Broker Producer . . . . . . . . . . . . . . 16
4.6. YANG Message Broker Consumer . . . . . . . . . . . . . . 16
4.7. YANG Data Consumer . . . . . . . . . . . . . . . . . . . 17
4.8. YANG Data Storage . . . . . . . . . . . . . . . . . . . . 17
5. Implementation Status . . . . . . . . . . . . . . . . . . . . 17
5.1. YANG Schema Registry Extension . . . . . . . . . . . . . 18
5.2. YANG-Push Receiver Parsing Library . . . . . . . . . . . 18
5.3. YANG Library Augmented-by Addition . . . . . . . . . . . 18
6. Security Considerations . . . . . . . . . . . . . . . . . . . 18
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1. Normative References . . . . . . . . . . . . . . . . . . 19
8.2. Informative References . . . . . . . . . . . . . . . . . 20
Appendix A. Project Milestones . . . . . . . . . . . . . . . . . 23
Appendix B. Open Points . . . . . . . . . . . . . . . . . . . . 25
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 26
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1. Introduction
Nowadays network operators are using YANG [RFC7950] to model their
configurations and obtain YANG modelled data from their networks. It
is well understood that plain text are initially intended for humans
and need effort to make it machine readable due to the lack of
semantics. YANG modeled data is addressing most of these needs.
Increasingly more network operators organizing their data in a Data
Mesh [Deh22] where a Message Broker such as Apache Kafka [Kaf11] or
RabbitMQ [Rab07] facilitates the exchange of messages among data
processing components like a stream processor to filter, enrich,
correlate or aggregate, or a time series database to store data.
Even though YANG is intend to ease the handling of data, this promise
has not yet been fulfilled for Network Telemetry [RFC9232]. From
subscribing on a YANG datastore, publishing a YANG modeled
notifications message from the network and viewing the data in a time
series database, manual labor, such as obtaining the YANG schema from
the network and creating a transformation or ingestion specification
into a time series database, is needed to make a Message Broker and
its data processing components with YANG notifications interoparable.
Since YANG modules can change over time, for example when a router is
being upgraded to a newer software release, this process needs to be
adjusted contionously, leading often to errors in the data chain if
dependencies are not properly tracked and schema changes adjusted
simultaneously.
1.1. Origins of YANG-Push
With [RFC3535] the IAB set the requirements for Network Management in
2003. From these requirements NETCONF [RFC6241], NETCONF
Notifications [RFC5277] and RESTCONF [RFC8040] have been defined to
configure through <edit-config> and retrieve operational data through
<get> and NETCONF notifications through <notification> from a YANG
datastore on a network node.
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With YANG-Push, as defined in [RFC8639], [RFC8640] and [RFC8641],
periodical and on-change subscriptions to the YANG datastore can be
dynamically or statically configured. When notifications are
dynamically configured, messages are published over the initially
established NETCONF session, while when it is statically configured
messages are published through HTTPS-based
[I-D.ietf-netconf-https-notif] or UDP-based
[I-D.ietf-netconf-udp-notif] transport. Section 3.7 of [RFC8641]
describes push-update messages where the YANG subscribed data is
being published, where Section 2.7 of [RFC8639] describes the
subscription state change notifications where changes in the
subscription are being described.
1.2. Origins of Apache Kafka
Apache Kafka [Kaf11] is a Message Broker that supports producing and
consuming messages from so called topics. Each topic has one or more
partitions where messages are replicated or load balanced to scale
out. With the introduction of Confluent Schema Registry [Con18] a
topic can contain one or more subjects. A subject refers to a Schema
defining the structure of the message. The Schema then is used to
validate messages sent through topics and are identified by a Schema
ID. The Schema ID is issued when the Schema is registered to the
Confluent Schema Registry. Once the Schema ID is obtained, it can be
prefixed to the message with a Confluent Schema Registry compatible
serializer. Messages can then be validated against Schema at the
producer or at the consumer from a topic to ensure Schema integrity
of the message. The type of Schema evolution scheme can be defined
per subject, wherever non backward compatibility changes are allowed
or not.
1.3. Document Scope
This document focuses on YANG-Push [RFC8641] as the messaging
protocol between the network node and the Network Telemetry [RFC9232]
data collection. It describes the main components and the aimed
architecture for deploying such solution in a production network.
Then, it illustrates the integration of the YANG 1.1 [RFC7950] as a
schema modeling language into the Apache Kafka Message Broker and
Confluent Schema Registry [Con18].
2. Conventions and Definitions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
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2.1. Terminology
This document defines the following terms:
Message Broker: is an intermediary software component that translates
messages from the formal messaging protocol of the sender to the
formal messaging protocol of the receiver routed in topics. Message
brokers are elements in Data Mesh where software applications
communicate by exchanging formally-defined messages.
Stream Catalog: provides a single point of access that allows users
to centrally search semantics for information across a Message
Broker.
Additionally it makes use of the terms defined in [RFC8639],
[RFC7950], Apache Kafka [Kaf11], Confluent Schema Registry
Documentation [ConDoc18] and Data Mesh [Deh22].
The following terms are used as defined in [RFC8639]:
* Publisher
* Receiver
* Subscription
* Subscription ID
* Event stream filter
* Notification message
The following terms are used as defined in Apache Kafka Message
Broker [Kaf11]:
* Producer
* Consumer
* Topic
* Partition
The following terms are used as defined in Confluent Schema Registry
Documentation [ConDoc18]:
* Schema
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* Schema ID
* Schema Registry
* Subject
The following terms are used as defined in Data Mesh [Deh22]:
* Data Product: A logical unit that contains all components to
publish, process and store domain data for analytical or data-
intensive use cases.
* Service Level Objective: Is a target value or range of values for
a service level that is measured by an service level indicator.
* Service Level Indicator: Is a measure of a service level provided
by a service provider to a customer.
3. Motivation
There are four main objectives for native YANG-Push notifications and
YANG Schema integration into a Message Broker.
3.1. Automatic Onboarding
Automate the Data Mesh onboarding of newly subscribed YANG metrics.
3.2. Preserve Schema
The preservation of the YANG schema, that includes the YANG data
types as defined in [RFC6991] and the nested structure of the YANG
module, throughout the data processing chain ensures that metrics can
be processed and visualized as they were originally intended. Not
only for users but also for automated closed loop operation actions.
3.3. Preserve Semantic Information
[RFC7950] defines in Section 7.21.3 and 7.21.4 the description and
reference statement. This information is intended for the user,
describing in a human-readable fashion the meaning of a definition.
In Data Mesh, this information can be imported from the YANG Schema
Registry into a Stream Catalog where subjects within Message Broker
are identifiable and searchable. An example of a Stream Catalog is
Apache Atlas [Atl15]. It can also be applied for time series data
visualization in a similar fashion.
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3.4. Standardize Data Processing Integration
Since the YANG Schema is preserved for operational metrics in the
Message Broker, a standardization for integration between network
data collection and stream processor or time series database is
implied.
4. Elements of the Architecture
The architecture consists of 6 elements. Figure 1 gives an overview
on the workflow.
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+------------------------------------------------------------+
| Data Storage |
+------------------------------------------------------------+
^
| (12) Ingest Data
| According to Schema
+------------------------------------------------------------+
| Data Consumer |
+------------------------------------------------------------+
(10) Get | ^ ^ (9) Validate
Schema | | | Serialized Message
| | | Schema on Consumer
| | |
| | +--------------------+
| | | Message |
| | | Broker |
| | +--------------------+
| | |
| | (11) Issue | (8) Serialize
| | | YANG-Push Message
| | | annotated Schema
v | Schema (6) Post | ID on Producer
+--------------------+ Schema +--------------------+
| YANG | <-------------- | Data Collection |
| Schema Registry | --------------> | YANG-Push Receiver |
+--------------------+ (7) Issue +--------------------+
Schema (4) Discover | ^ (3) Receive
ID Schema | | YANG-Push
Dependencies | | Subscription
and Obtain | | Start Message
Schemas | | ^
| | |
| | | (5) Publish
| | | YANG-Push
| | | Message
| | | with
(1) Discover Notif. v | | Subscr. ID
+--------------------+ Capabilities +--------------------+
| Manage YANG-Push | ---------------> | Network Node |
| Subscription | (2) Subscribe | YANG-Push Publisher|
+--------------------+ ---------------> +--------------------+
Figure 1: End to End Workflow
The workflow diagram (Figure 1) describes the steps from establishing
the YANG-Push subscription to Data Storage ingestion.
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4.1. YANG-Push Subscription
With step number (1) in the workflow diagram, the YANG-Push
notification transport capabilities are being discovered according to
[I-D.netana-netconf-yp-transport-capabilities], notification
capabilities according to [I-D.netana-netconf-notif-envelope] and
notification subscription capabilities according to Section 3 of
[RFC9196].
With step (2) a YANG-Push subscription according to Section 2.4 and
2.5 of [RFC8639] is dynamically or statically configured.
With step (3) subscription state change notifications are sent
according to section 2.7 from the YANG-Push publisher to the receiver
to inform which event stream filter has been applied to which
subscription ID.
When the YANG-Push subscription is managed dynamically, the YANG data
is being received on the same NETCONF session where the subscription
is being maintained. With configured subscription the YANG data is
sent to the YANG-Push receiver through a separate transport session.
[I-D.ietf-netconf-yang-notifications-versioning] adds the capability
to subscribe to a specific YANG module revision or a YANG module
which needs to be backward compatible to in step (2) and adds the
module name, revision, revision-label and yang-library-content-id
information into the subscription state change notifications in step
(3).
Figure 2 provides and example how to create a YANG-Push configured
subscription with NETCONF in XML [W3C.REC-xml-20081126] with UDP-
based [I-D.ietf-netconf-udp-notif] transport
========== NOTE: '\' line wrapping per RFC 8792) ===========
<rpc message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<edit-config>
<target>
<running/>
</target>
<config>
<subscriptions xmlns="urn:ietf:params:xml:ns:yang:ietf\
-subscribed-notifications">
<subscription>
<id>6666</id>
<datastore xmlns="urn:ietf:params:xml:ns:yang:ietf\
-yang-push"
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xmlns:ds="urn:ietf:params:xml:ns:yang:ietf\
-datastores">ds:operational</datastore>
<datastore-xpath-filter xmlns="urn:ietf:params:xml:ns\
:yang:ietf-yang-push"
xmlns:if="urn:ietf:params:xml:ns:yang:ietf-inter\
faces">/if:interfaces</datastore-xpath-filter>
<revision xmlns="urn:ietf:params:xml:ns:yang:ietf-yang\
-push-revision">2018-02-20</revision>
<transport xmlns:unt="urn:ietf:params:xml:ns:yang:ietf\
-udp-notif-transport">unt:udp-notif</transport>
<encoding>encode-json</encoding>
<receivers>
<receiver>
<name>subscription-specific-receiver-def</name>
<receiver-instance-ref xmlns="urn:ietf:params:xml\
:ns:yang:ietf-subscribed-notif-receivers">\
global-udp-notif-receiver-def</receiver-instance-ref>
</receiver>
</receivers>
<periodic xmlns="urn:ietf:params:xml:ns:yang:ietf-yang-push">
<period>6000</period>
</periodic>
</subscription>
<receiver-instances xmlns="urn:ietf:params:xml:ns:yang:ietf\
-subscribed-notif-receivers">
<receiver-instance>
<name>global-udp-notif-receiver-def</name>
<udp-notif-receiver xmlns="urn:ietf:params:xml:ns:yang\
:ietf-udp-notif-transport">
<address>192.0.5.1</address>
<port>12345</port>
<enable-segmentation>false</enable-segmentation>
<max-segment-size/>
</udp-notif-receiver>
</receiver-instance>
</receiver-instances>
</subscriptions>
</config>
</edit-config>
</rpc>
Figure 2: NETCONF Example to establish configured subscription
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Figure 3 provides an example of a JSON encoded, [RFC7951],
subscription-started state change notification message over HTTPS-
based [I-D.ietf-netconf-https-notif] or UDP-based
[I-D.ietf-netconf-udp-notif] transport with
[I-D.netana-netconf-notif-envelope] and
[I-D.ietf-netconf-yang-notifications-versioning] as extensions for
the same subscription.
{
"ietf-yp-notification:envelope": {
"event-time": "2023-03-25T08:30:11.22Z",
"hostname": "example-router",
"sequence-number": 1,
"notification-contents": {
"ietf-subscribed-notification:subscription-started": {
"id": 6666,
"ietf-yang-push:datastore": "ietf-datastores:operational",
"ietf-yang-push:datastore-xpath-filter": "/if:interfaces",
"ietf-yang-push-revision:revision": "2014-05-08",
"ietf-yang-push-revision:module-name": "ietf-interfaces",
"ietf-yang-push-revision:revision-label": "",
"ietf-distributed-notif:message-publisher-ids": [1,2],
"transport": "ietf-udp-notif-transport:udp-notif",
"encoding": "encode-json",
"ietf-yang-push:periodic": {
"ietf-yang-push:period": 100
}
}
}
}
}
Figure 3: JSON YANG-Push Example for a subscription-started
notification message
4.2. YANG-Push Publisher
With step number (4) in the workflow diagram, a YANG-Push push-update
or push-change-update message, depending on wherever periodical or
on-change subscription has been established, is sent from the YANG-
Push publisher to the receiver according to Section 3.7 of [RFC8639].
[I-D.netana-netconf-notif-envelope] defines the YANG-Push
notification header in YANG with event-time, hostname and sequence-
number to enable a YANG data consumer to recognize with the hostname
from which network node the message was published from and with
sequence-number message reordering or loss.
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[I-D.ietf-netconf-distributed-notif] adds a message-publisher-id for
network nodes with distributed architecture where multiple YANG-Push
publishing processes are publishing messages. The message-publisher-
id enables a YANG data consumer to recognize from which YANG-Push
publisher process the message was published from.
Section 3.5.1 of [I-D.netana-netconf-notif-envelope] adds observation
timestamp and point-in-time in the YANG-Push push-update or push-
change-update message. observation timestamp contains the timestamp
and point-in-time when the metrics where observed.
Figure 4 provides an example of a JSON encoded, [RFC7951], push-
update notification message over HTTPS-based
[I-D.ietf-netconf-https-notif] or UDP-based
[I-D.ietf-netconf-udp-notif] transport and
[I-D.netana-netconf-notif-envelope] with hostname, sequence-number,
observation timestamp and point-in-time as extensions.
========== NOTE: '\' line wrapping per RFC 8792) ===========
{
"ietf-yp-notification:envelope": {
"event-time": "2023-03-25T08:30:11.22Z",
"hostname": "example-router",
"sequence-number": 1,
"notification-contents": {
"ietf-yang-push:push-update": {
"id": 6666,
"ietf-yp-observation:timestamp": \
"2023-03-25T08:30:11.22Z",
"ietf-yp-observation:point-in-time": \
"current-accounting",
"datastore-contents": {
"ietf-interfaces:interfaces": [
{
"interface": {
"name": "eth0",
"type": "iana-if-type:ethernetCsmacd",
"oper-status": "up",
"mtu": 1500
}
}
}
]
}
}
}
}
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Figure 4: JSON YANG-Push Example for a push-update notification
message
Figure 5 provides an example of a JSON encoded, [RFC7951], push-
change-update notification message over HTTPS-based
[I-D.ietf-netconf-https-notif] or UDP-based
[I-D.ietf-netconf-udp-notif] transport and
[I-D.netana-netconf-notif-envelope] with hostname, sequence-number,
observation timestamp and point-in-time as extensions.
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========== NOTE: '\' line wrapping per RFC 8792) ===========
{
"ietf-yp-notification:envelope": {
"event-time": "2023-03-25T08:30:11.22Z",
"hostname": "example-router",
"sequence-number": 1,
"notification-contents": {
"ietf-yang-push:push-change-update": {
"id": 2222,
"ietf-yp-observation:timestamp": \
"2023-03-25T08:30:11.22Z",
"ietf-yp-observation:point-in-time": \
"state-changed",
"datastore-contents": {
"yang-patch": {
"patch-id": "patch_54",
"comment": "Changing encoding to JSON and increasing \
the period to 10 minutes",
"edit": [
{
"edit-id": "id_change_1",
"operation": "merge",
"target": "/ietf-subscribed-notifications\:subs\
criptions/subscription[id=2222]",
"value": {
"ietf-subscribed-notifications:encoding": \
"ietf-subscribed-notifications:encode-json",
"ietf-yang-push:periodic": {
"period": 60000
}
}
}
}
]
}
}
}
}
}
Figure 5: JSON YANG-Push Example for a push-change-update
notification message
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4.3. YANG-Push Receiver
For all the YANG modules and revisions of each sysName and
subscription ID in the subscription state change notification
received in step number (3) in the workflow diagram, all the YANG
module dependencies need to be determined through the YANG Library
[RFC8525], and then through NETCONF <get-schema> rpc calls according
to [RFC6022] all YANG modules need to be retrieved as described in
step (4) in the workflow diagram.
[I-D.ietf-netconf-yang-library-augmentedby] extends the YANG Library
so that not only the submodule but also the augmentation list can be
obtained.
A change in xpath or sub-tree filter or module name in the
subscription state change notifications indicates that the subscribed
path has changed. A change in revision indicates that the version of
the YANG module of the subscribed path has changed, where revision-
label indicates wherever the revision was backward compatible or not.
YANG Libary content-id changes indicates that there were potential
semantic changes in the augmented or imported yang modules of the
subscribed xpath or sub-tree. If no change to previous subscription
state is observed, step 4 can be omitted.
Figure 9 in Section 4.1 and YANG module in Section 5 of [RFC8641]
defines the payload of YANG-push notifications where "datastore-
contents" or the "value" of a "push-change-update") is "anydata".
[RFC7950] Section 7.10 states that anydata represents an unknown set
of nodes that can be modeled with YANG, and the model is not known at
design time and that the model of the unknown set of nodes can be
signaled through another protocol. This poses and issue in the
schema validation of YANG-Push notifications and will be further
clarified in point number (1) and (2) in Appendix B.
4.4. YANG Schema Registry
The schema registry SHOULD support YANG as the format for defining
schema. For each schema registered into the schema registry, a
schema ID is returned. That schema ID can be used when interacting
with the Message Broker to indicate the schema to use with the
message.”
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Confluent Schema Registry is pluggable. Currently Supports AVRO,
JSON Schema and Protobuf. The YANG support is being developed at
[Yak24] as part of this architecture. Enable to register, obtain and
compare [YSR24] YANG Schemas. One YANG Schema with all its
augmentations is being registered per YANG-Push subscription ID. for
each YANG Schema a locally significant Schema ID is being issued as
described in step (7) in the workflow diagram.
curl -X POST -H "Content Type: application/vnd.schemaregistry.v1+json"
http://localhost:8081/subjects/ietf-interfaces/
Figure 6: Register ietf-interfaces.yang into YANG Schema Registry
curl http://localhost:8081/subjects/ subjects/ | jq
Figure 7: List all subjects YANG Schema Registry
curl http://localhost:8081/subjects/ietf-interfaces/versions
Figure 8: List versions of a given subject in YANG Schema Registry
curl http://localhost:8081/subjects/ietf-interfaces/versions/1
Figure 9: Retrieve schema of a specific subject and version in
YANG Schema Registry
4.5. YANG Message Broker Producer
The previously issued Schema ID is prefixed to the previously in
Section 4.3 described metadata augmented YANG push push-update
message and serialized to a Message Broker topic in step (8) of the
workflow diagram.
4.6. YANG Message Broker Consumer
From the Message Broker topic the message is being consumed and the
prefixed Schema ID is being used in step (10) of the workflow diagram
to retrieve the YANG Schema to validate the Schema integrity of the
message.
In order to valida Schema integrity, the event stream filter of the
subscription ID in the subscription started or modified message is
needed to apply [I-D.aelhassany-anydata-validation] on the YANG
schema tree.
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4.7. YANG Data Consumer
The data storage ingestion specifications are being derived with the
in Section 4.6 already retrieved Schema ID and YANG-Push push-update
messages can be now ingested and indexed into the data storage table
according to their schema in step (12).
By tracking the YANG-Push notification sequence-number for a given
hostname as defined in Section 3.4 of
[I-D.netana-netconf-notif-envelope] loss can be recognized accross
the YANG data processing chain. By taking the event-time in the
YANG-Push notification header and the time the YANG-Push notification
messages was consumed into account, the serialization delay between
YANG-Push publisher and YANG Data Consumer can be measured.
The loss rate and delay for a given hostname can be used as a Service
Level Indicator for the YANG data product in the Data Mesh [Deh22].
4.8. YANG Data Storage
The YANG data is being ingested in step (12)according to the
previously defined ingestion specification and indexed with the
timestamp defined in observation timestamp as defined in
Section 3.5.1 of [I-D.netana-netconf-notif-envelope]. A network
operator is now able to query the previously subscribed YANG data.
5. Implementation Status
Note to the RFC-Editor: Please remove this section before publishing.
This section records the status of known implementations of the
protocol defined by this specification at the time of posting of this
Internet-Draft, and is based on a proposal described in [RFC7942].
The description of implementations in this section is intended to
assist the IETF in its decision processes in progressing drafts to
RFCs. Please note that the listing of any individual implementation
here does not imply endorsement by the IETF. Furthermore, no effort
has been spent to verify the information presented here that was
supplied by IETF contributors. This is not intended as, and must not
be construed to be, a catalog of available implementations or their
features. Readers are advised to note that other implementations may
exist.
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According to [RFC7942], "this will allow reviewers and working groups
to assign due consideration to documents that have the benefit of
running code, which may serve as evidence of valuable experimentation
and feedback that have made the implemented protocols more mature.
It is up to the individual working groups to use this information as
they see fit".
5.1. YANG Schema Registry Extension
Ahmed Elhassany is developing a YANG Schema Extension in Confluent
Schema Registry.
The source code can be obtained here: [YSR24], the progress report
here: [YSRPR24], and was validated at the IETF 117 hackathon.
5.2. YANG-Push Receiver Parsing Library
Zhuoyao Lin developed as part of her internship a library to parse
YANG-Push subscription notifications, identify YANG module
dependencises with YANG Library [RFC8525] and obtain with NETCONF
<get-schema> rpc calls [RFC6022] all YANG modules from YANG-Push
publisher.
The source code can be obtained here: [LYP23] and was validated at
the IETF 117 hackathon.
5.3. YANG Library Augmented-by Addition
Zhuoyao Lin implemented [I-D.ietf-netconf-yang-library-augmentedby]
in order to discover augmented-by YANG modules in YANG Library
[RFC8525].
The source code can be obtained here: [YLA24] and was validated at
the IETF 119 hackathon.
6. Security Considerations
TBD
7. Acknowledgements
The authors would like to thank Yannick Buchs, Benoit Claise, Mohamed
Boucadair, Dhruv Dhody, Qin Wu, Andy Bierman, Feng Chong, Holger
Keller, Kristian Larsson and Ignacio Dominguez Martinez-Casanueva for