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Do you really need to fork OpenWRT?
Sharing our experience with
OpenWISP Firmware
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Introducing myself
Federico CapoanoDeveloper
CINECA consortium (Italy)R&D division
OpenWiFi subdivision
Lead developer of openwisp.org,Contributor of ninux.org and battlemesh.org
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Introducing the OpenWIFI service
Municipal WiFi for cities and regions
With 1st and 2nd level support 5 days a week
Based entirely on FLOSS solutions
Affordable cost
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Widely deployed
Widely used in the Italian peninsula
Rome, Turin, Bari, and many more cities
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opendata.publicwifi.it
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The OpenWISP Project
Free software project (GPLv3)
offering a complete municipal wifi solution
(firmware, controller, monitoring, captive portal)
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OpenWISP users & contributors
Cineca
Unidata (ISP)
Other local ISPs
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OpenWISP Firmware
Based on OpenWRT
Deployed on over 3000 devices
Located in public places
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Most common locations
● public squares● libraries● parks● metro stations● buses● shopping centers
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Firmware main features
Remotely controlled from OpenWISP Manager
Layer 2 VPN to Captive Portal
Layer 3 Management VPN
3G/4G support
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Development stage 1
Beginning of 2008
Brutal OpenWRT Fork
Kamikaze (7.09) version
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Development stage 2
Beginning 2011Separate repository
Custom script for compilationNot a standard openwrt package
Very high customizationWorked with Backfire (10.03) only
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Development stage 3
mid 2014
3 proper OpenWRT Packages:
(base, umts, mesh)
Still highly customized
Works with multiple OpenWRT versions
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Packages for da win
Why packages are
the BEST choice for us?
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Easy & Fast upgrades
Upgrading to new OpenWRT
releases is VERY easy
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Easier maintainance
Less development time spent
on messing with forking issues
Money saved, developers happy!
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Already deploying Chaos Calmer
OpenWISP Firmware 1.3.1 works with
Chaos Calmer (September)
and we are deploying it
in the real world right now
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Without packages
2 (frigging) years to upgrade to
Attitude Adjustment
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With packages
In less than 1 month we started
deploying Chaos Calmer!
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Let's talk about customizations
Custom UI
Bridging and VLANs not managed through UCI
Layer 3 VPN not managed through UCI
Configuration applied with custom scripts
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Good things about customizations
We got what we wanted
and we got it fast!
Very good for the short term
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Bad things about customizations
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Most of our customizations are
dirty hacks
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When the initial developers left
New developers arrived and went crazy
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Hard to maintain
Hard to add new features
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Prevented us benefiting from
improvements to OpenWRT
(in the areas we customized)
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Paying the price of customization
All these customizations are slowing us down!
We want to gradually get rid of them
and use the standard OpenWRT tools
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Maintaining softwarerequires testing
let's talk about continous integration testing
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Automated compilation stage 1
Jenkins CI setup for automatic compilation
each git commit triggers a build
A bit cumbersome to maintain over time
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Automated compilation stage 2
Travis-CI for disposable test builds
Easier for development
https://github.com/claudyus/owrt-package-test
Still using Jenkins-CI for our own builds
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Automated hardware testing?
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Automated hardware testing?
Very hard, we had to put this task on hold
We'd be very happy to know more
about this topic!
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Recap!
if you don't have a lot of resources
to maintain, secure and upgrade
your own customizations
you should definitely...
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Do more packages
Compared to forks packages are:
Easier to maintain
Easier to document
Easier to use and contribute to
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Do more packages
Reusable by the rest of the
OpenWRT community
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Do more packages
Which means more people
will contribute to fix bugs
and security issues
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Do one package for each problem
1 solution for each package
The Unix Philosophy:
Do one thing and do it well!
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Avoid the “giant ball of mud”
Avoid solving too many problems
in one package
Or else you are headed for trouble
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Stay close to OpenWRT
Upgrade easily
Benefit from new features in OpenWRT
Benefit from security upgrades
Easier to get support (IRC, mailing-list)
Easier to contribute back
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Do automatic compilation testing
Check out
https://github.com/claudyus/owrt-package-test
Tell us more about your own solutions
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Let's collaborate!
We would like to collaborate with
other research groups
or companies who share our values:
Free software, freedom of communication
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Thank you!
Twitter:
@nemesisdesign
@OpenWISP
Github: github.com/openwisp