Microservice is gaining increased adoption in the Telco NFV world. It is key to understand the design and deployment methodologies involved in developing Microservice based VNF. This talk provides an opensource practitioner approach to building and deploying a Microservice based VNF and includes the following: - Design patterns, workflow models - Design models for VNF placement, capacity management, scale-in/out and resiliency - Deployment considerations that includes handing of scale and fault tolerant VNF using well known Opensource tools. About the presenter: Prem Sankar works for Ericsson Opensource Ecosystem team and part of the Opendaylight and OPNFV team in Ericsson. Prem evangelizes SDN and Cloud and has given many sessions and conducted workshops around SDN and ODL. Prem is PTL of ODL COE project and currently driving the Kuberenetes and ODL Integration in Opendaylight community. Prem is a frequent speaker at opensource summits and has presented in Opendaylight, OPNFV and Open networking summits.

1. Open source Approach to Design
and Deployment of Microservices
based VNF
PREM SANKAR G, ERICSSON
HTTPS://TWITTER.COM/PREMSANKAR

2. Agenda
 Microservices overview
 VNF Characteristics
 Opensource Ecosystem
 Mapping to ETSI NFV architecture
 Design Patterns
 VNF Deployments
 ONAP

3. Microservices – Quick Intro
• Reference – Martin Fowler, http://martinfowler.com

4. Principles that drive Microservices
architecture
• Services must be loosely coupled so that they can be developed, deployed
and scaled independently
• Organized around business capabilities
• API Focused
• Smart endpoints and dumb pipes
• Decentralized Governance
• Decentralized Data Management
• Infrastructure Automation (infrastructure as code)
• Design for failure
• Evolutionary Design

5. Network Functions - Evolution
PNF VNF
Hypervisor
Microservices VNF
Hardware
µs µs µs
µs µs µs
µs runtime engine

6. Key drivers for microservices VNF
 Business needs
 5G, IOT
 Hardware evolution – OCP
 Elasticity
 Fault Tolerance
 Agility
 API-based/End points
 Infra and Location agnostic
 Central Orchestration
 Predictability
 Upgradability
 Testing
 A/B Testing
 Canary testing

7. Lifecycle
Workflow
Manager and
Orchestrator
Continuous
Integration
Continuous
Deployment
Monitoring
Design and
Creation
Deployment
and
Execution
Operation,
Analytics and
Maintenance
 Requirements
 Service Orchestration
 Infrastructure Orchestration
 Business Process mapping
 Audit and Validation
 Security

8. ETSI NFV Architecture

9. Microservices Design Patterns
• Reference – Chris Richardson
http://microservices.io/patterns/micr
oservices.html

10. Microservices Design Patterns for VNF
 Decomposition Pattern
 Subdomain context
 Service discovery Pattern
 Database per service Pattern
 Keep each microservice’s persistent data private to that service and accessible only via its API
 RDBMS design approaches
 Private-tables-per-service – each service owns a set of tables that must only be accessed by that service
 Schema-per-service – each service has a database schema that’s private to that service
 Database-server-per-service – each service has it’s own database server.
 Circuit Breaker
 API Gateway Pattern

11. Opensource Ecosystem
• Workflow Manager and Orchestrator
• ONAP , ARIA, OSM
• Design and Deployment
• CI/CD Pipelines
• Jenkins
• Fabric8 (Jenkins, Kubernetes and Docker)
• Other options – goCD, concourse.ci
• Ansible/Puppet/Chef
• Execution/NFVi
• Kubernetes with ODL/CANAL/Weave, OPNFV
• Service Mesh - Istio
• Monitoring
• Prometheus and other alternatives (https://prometheus.io/docs/introduction/comparison/)
• Tracing
• Zipkin
• Logging
• ELK stack

12. VNF Deployment scenario
Neutron Plugin or Gluon/Proton
Linux Linux Linux Linux
Kubernetes
Datacenter Hardware
Linux
OpenStack
OVS
App
Orchestration Systems
OpenStack APIs
OpenDaylight
Kubernetes APIs
CNI Plugin
KVM KVM ContainerRT
Container RT
App App App
VM Application Container Application
App
App App

13. ETSI NFV Architecture
OSM
ONAP
Kubernetes/Openstack
ODL
OVS/FD.IO
Microservices - VNF

14. ONAP
 Design Time
 Service Design and Creation
 Policy
 Runtime
 Inventory
 Controllers
 Dashboard
 Master Service Orchestrator
 Security
 Analytics

15.  Topology and Orchestration Specification for Cloud Applications
 Goals
 Automation of service deployment and management
 Portability
 Interoperability
 Vendor-Neutral
 Model to define structure of service and how to manage it
 Service composition
 Topology Template – Structure of a service
 Plans to manage service during its life time
TOSCA 101

16. TOPOLOGY TEMPLATE
› Service template
– Topology Template
– Node Type
– Relationship Type
– Plans
› Plans
– Parallel Execution
– Error Handling
– Audit/Trace
– Human tasks

17. MODEL APPS

18. Container Orchestration Engine Integration
- OpenDaylight
Host OS
Open vSwitch
Host OS
Open vSwitch
VM
Container
App
Container
App
Container
App
VLAN’s
Orchestrator
OpenDaylight
Kubernetes / Docker
Kuryr
Neutron / Gluon
Container
App
Container
App
Container
App
Container
Mgt
(docker,
kube-
pxy)
Iptables / NAT/FW
Native
• Reference – ODL COE project, http://wiki.opendaylight.org/view/COE:Main

19. Q&A
Any organization that designs a system
(defined broadly) will produce a design
whose structure is a copy of the
organization's communication structure.
-- Melvyn Conway, 1967