Test-Driven-Development for Networking: Making CI Work for You by Colin McNamara

Continuous Integration and Test
Driven Dev for Network Engineers
www.Nexusis.com 1 877.286.3987
Colin McNamara CCIE #18233
@colinmcnamara

Agenda
 What drives my perspective
 Why TDD / CI for Network Engineers
 CI / TDD overview
 Network Change Management Use Case

Who am I?
 Chief Cloud Architect::Nexus
 OpenStack ATC/Ambassador
 OpenStack Core Reviewer
 Manage DevOps Team
 Manage Agile BPO Team
 Beard Growth Specialist
 CCIE 18233, RHCE, ETC, ETC
 @colinmcnamara
 www.colinmcnamara.com

What do
we do?
50%
upstream
For Core Dev’s
Software Development, Systems
Integration, Network Design
DenicaCloud
Rosetta
Aviator
More
Project Denica
Toolchain for Deploying CI systems
and the associated tooling into and
along with various cloud platforms
Core Contributions
and solutions in
OpenStack
OpenDaylight
Open vSwitch
Puppet
Agile / Lean Software
Development Practices
Extensive experience
with the folliwng:
• SDN Development for
Multi Vendor Integrations
• Agile Process Consulting
• Cloud Platform
Development
• Systems Integration
• Upstream contributions
• DevOps Consulting

That all boils down to.. We make unicorn farts

Why TDD / CI for
Networking?

Our industry is changing

Four closely related items

Agile infrastructure evolution
Classic Engineering
 12 + month dev times
 QA pushed till last
 Large amounts of bugs
 Maps easily to manual
silo’d process’s
 ITIL Aligned
AGILE
 2 Week Dev times
 Integrated QA
 Small bug counts
 Does not map into silo’d
process’s
 Cloud Aligned

Speed Racer (Agile Infrastructure Developer)
• Integrated tools
• Integrated test QA
• Software as a manufacturing line
• Code rolls from Step to Step
• Need infrastructure as code…

DevOps is the “New”
Network Ops

Core SDN truth
ONE change
In one FILE
Can CREATE a system
Or DESTROY a system

What if you could actually KNOW it would work
 Test EVERY network
change made
 Map each application to
the network component
underneath
 Automatically run tests with
reports of results

Agile Development Continuous
Integration for Network
Engineers
Technical items you need to know

DevOps Workflows

Complex View

Simple CI System Walk Through
SVC Only
SVC + Network
“Virtualized”
Production
System

Obligatory Tools Discussion

Git / Gerrit

Integration Opportunity for CI Pipelines
 VIRL(CMS) / JunoSphere
 Functional Test
 Network OS level testing
 MATE / WAE
 Stubs / Modeling
 Integration Test through API’s
 Tail-F, Schprokits, Puppet/Chef, Ansible
 Config Distribution
 Unified Data Models

Use Case
Change and Release Management

Jenkins
Test Harnesses
Governance
Tooling
Git
Gerrit
Templates and
EPG’s
Git
Gerrit
Gerrit
Gerrit
Jenkins
Test Harnesses
Vagrant Ant
Puppet
Jenkins
Test Harnesses
Vagrant
Puppet
Git
Gerrit
Puppet
Other
Git
Gerrit
Test Harnesses
Puppet
Other
Jenkins
Test Harnesses
Puppet
Jenkins Other
Test Harnesses
Vagrant
Puppet
Gerrit
Governance
Tooling

Maturity Levels – how to move forward
Level0 Level1 Level2 Level3 Level4
• Self Service Builds
• Nightly Builds
• Build Artifacts are
stored
• Self Services deploy
to test
• Auto deploy of
builds to 1st env
• Mostly standard
deploys
• Significant Test
execution at build
time
• Visibility: Team
• Latest reports always
accessible
• Build on commit
• Dependency Repo
• Secured Configs
• Self-Service deploy
to test and prod
• Standard Process
across all
environments
• Some Static analysis
• Automated Funct
tests run nightly
• Visibility: Cross
siloe’d team
(DevOps)
• Historical reports
available
• Triggered Builds
• Build Cluster
• Test Gated
Automated
Promotions
• Database
Deployments
• Multi-tier SOA
• High Code Coverage
• Security Scans
• Risk based manual
• testing
• Report trending
• Build from
Snapshots
• Gated Commit
• Continuous
Deployment to
production
• 100% Coverage
• Gross Silo Analysis
Management QA Operations Development
• Build Value Stream
Maps
• Build Scripts
• Source Control
• Deployment Scripts
• Source Control
• Build Test
Automation
• Source Control
• Visibility: Siloed
Individuals
• Tool Generating
Reporting

How to get there – Level 0
Development
•Create standards for service chains (cfg,controler)
•Configuration Templates , puppet modules
•Use source control - Git
•Build VSM of specific IT process
Operations
•Script Deployments – Expect, Simple Puppet
•Use source control – Git
QA
•Build new services in lab / cloud / virt environment – VIRL /
GNS3 / VMware / OpenStack
•Simple test harness built (ping)
Management
•Individual Kanban Boards / Ticket tracking
Maps
• Build Scripts
• Source Control
• Source Control
• Build Test
Automation
• Source Control
Individuals
• Tool Generating
Reporting
Level1 Level2
• Self Service
Builds
• Nightly Builds
• Build Artifacts
are stored
• Self Services
deploy to test
• Auto deploy of
builds to 1st env
• Mostly standard
deploys
execution at
build time
• Latest reports
always
accessible
• Build on commit
• Dependency
Repo
• Secured Configs
• Self-Service
deploy to test
and prod
• Standard
Process across
all environments
• Some Static
analysis
• Automated
Funct tests run
nightly
siloe’d team
(DevOps)
• Historical
reports available
Level0

Development
• Ci System Implemented
• Scripts build virtual env on demand
• Results from built system get stored
Operations
• Deployment via Config Mgmt tooling
•Governance / CI system deployed
•Ops review of config diffs
QA
•CI System Implemented
•Common functional tests created
•Common port / path tests created
Management
• Visualize flow – Kanban Board for team
• Initial ScrumBan Process’s Mapped
Maps
• Build Scripts
• Source Control
• Source Control
• Build Test
Automation
• Source Control
Individuals
• Tool Generating
Reporting
Level1 Level2
• Nightly Builds
stored
to test
• Auto deploy of
builds to 1st env
• Mostly standard
deploys
execution at build
time
accessible
• Build on commit
• Dependency
Repo
• Secured Configs
• Self-Service
deploy to test
and prod
• Standard
Process across
all environments
• Some Static
analysis
• Automated
Funct tests run
nightly
siloe’d team
(DevOps)
• Historical
reports available
Level0

Development
• Ci Systems integrated with Governance + Src Control
• Dendancy Mapping (Mvn, Ant, EPG’s)
• Keys, Passwords as variables, stored securely
Operations
• CI Chain Integrated w/ release
• Governance tool used for Change Control Board
• Puppet + Vagrant + Scripts abstracted from Dev, test prod
QA
• CI System Implemented
• CI system running Spec tests / Flake8 etc
• System building environment and running tests emulating applications
Management
• Roll up reports of multiple team boards
• Burndown charts stored
• Card movements logged
• DevOps changes mapped to existing process’s
Maps
• Build Scripts
• Source Control
• Source Control
• Build Test
Automation
• Source Control
Individuals
• Tool Generating
Reporting
Level1 Level2
• Nightly Builds
stored
to test
• Auto deploy of
builds to 1st env
• Mostly standard
deploys
execution at build
time
accessible
• Build on commit
• Dependency Repo
• Secured Configs
• Self-Service deploy
to test and prod
• Standard Process
across all
environments
• Some Static analysis
• Automated Funct
tests run nightly
siloe’d team
(DevOps)
• Historical reports
available
Level0

Take Aways

Key Points
 TDD increases quality / decreases risk / increases velocity
 Network Operations and Design benefit from Agile
Methodologies
 Defining and executing on a maturity model necessary to
succeed.

@colinmcnamara
www.colinmcnamara.com

Test-Driven-Development for Networking: Making CI Work for You by Colin McNamara

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