Rootconf 2019
Rootconf For members

Rootconf 2019

On infrastructure security, DevOps and distributed systems.



##About Rootconf 2019:
The seventh edition of Rootconf is a two-track conference with:

  1. Security talks and tutorials in audi 1 and 2 on 21 June.
  2. Talks on DevOps, distributed systems and SRE in audi 1 and audi 2 on 22 June.

##Topics and schedule:
View full schedule here:

Rootconf 2019 includes talks and Birds of Feather (BOF) sessions on:

  1. OSINT and its applications
  2. Key management, encryption and its costs
  3. Running a bug bounty programme in your organization
  4. PolarDB architecture as Cloud Native Architecture, developed by Alibaba Cloud
  5. Vitess
  6. SRE and running distributed teams
  7. Routing security
  8. Log analytics
  9. Enabling SRE via automated feedback loops
  10. TOR for DevOps

##Who should attend Rootconf?

  1. DevOps programmers
  2. DevOps leads
  3. Systems engineers
  4. Infrastructure security professionals and experts
  5. DevSecOps teams
  6. Cloud service providers
  7. Companies with heavy cloud usage
  8. Providers of the pieces on which an organization’s IT infrastructure runs -- monitoring, log management, alerting, etc
  9. Organizations dealing with large network systems where data must be protected
  10. VPs of engineering
  11. Engineering managers looking to optimize infrastructure and teams

For information about Rootconf and bulk ticket purchases, contact or call 7676332020. Only community sponsorships available.

##Rootconf 2019 sponsors:

#Platinum Sponsor


#Gold Sponsors

Atlassian Endurance Trusting Social

#Silver Sponsors

Digital Ocean GO-JEK Paytm

#Bronze Sponsors

MySQL sumo logic upcloud
platform sh nilenso CloudSEK

#Exhibition Sponsor

FreeBSD Foundation

#Community Sponsors

Ansible PlanetScale

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Rootconf is a community-funded platform for activities and discussions on the following topics: Site Reliability Engineering (SRE). Infrastructure costs, including Cloud Costs - and optimization. Security - including Cloud Security. more

Kushal Das


Building reproducible Python applications for secured environments

Submitted Mar 14, 2019

We all have to package Python based applications for various environments, starting from command line tools, to web applications. And depending on the users, it can be installed on thousands on computers or on a selected few systems. is our goto place for finding any dependencies and also in most of the time we install binary wheels directly from there, thus saving a lot time.
But, Python is also being used in many environments where security is the utter most important, and validating the dependencies of project is also very critical along with the actual project source code. Many of noticed the recent incident where people were being able to steal bitcoins using a popular library.This talk will take SecureDrop client application for journalists as an example project and see how we tried to tackle the similar problem. SecureDrop is an Open Source whistleblower system which is deployed over 75 news organizations all over the world. Our threat model has nation state actors as possible threats, so, security and privacy of the users of the system is a very important point of the whole project. The tools in this case are build and packaged into reproducible Debian deb packages and are installed on Qubes OS in the final end user systems.

There are two basic ways we handle Python project dependencies, for most of the development work, we use a virtualenv, and directly install the dependencies using wheels built from When we package the application for the end users, many times we package them using a operating system based package manager and ask the users to install using those (say RPM or Debian’s deb package). In the second case, all the dependencies come as separate packages (and most of the time from the OS itself). The dependency is being handled by the OS package manager itself. That case, we can not update the dependencies fast enough if required, it depends on the packagers from the community who maintains those said packages in the distribution.

We use dh-virtualenv project to help us to use our own wheels + a virtualenv for the project to be packaged inside the debian .deb package. This talk will go throuh the process of building wheels from known (based on sha256sum) source tarballs, and then having a gpg signed list of updated wheels and a private index for the same. And also how we are verifying the wheels’ sha256sum (and the signature of that list) during the build process. The final output is reproducible Debian packages.

Each part of the talk will tell what steps are done (in a sentence or two) and then explain why those are necessary.


Keeping the final artifacts which get installed on the systems in a secured environment is always a challenge. There are various attack vectors, starting from malware in source to tampering in the build process. People also want to verify any binary package to make sure that they can also build the exact same artifacts for a source.

This talk is for devlopers and administrators (or devops persons) and architects of such secured environments. The talk also tries to identify the possible ways the similar approaches which can be used by smaller projects or teams or other enterprise projects running on old operating systems.


  • Introduction - 1 minute
  • Why all of these painful steps? 2 minutes
  • SecureDrop client desktop tools and their dependency on other upstream projects (or think about an application structutre and standard deployment strategy)- 3 minutes
  • Updating dependencies or do we read all updates? - 2 minutes
  • Development environment and using pipenv + tools to create requirements.txt wtih hashes only for source - 3 minutes
  • Structure of a static HTML based private package index - 4 minutes
  • GPG signed list of already built wheels + syncing them locally - 2 minute
  • Running python3 sdist to create the release tarball + a step before to have a requirements..txt with only binary hashes from our list of wheels. - 5 minutes
  • Final Debinan packaging script (for automation) which does double verification of the wheel hashes. - 3 minutes
  • Reproducible Debian package as end product - 2 minutes
  • Possibility in the RPM land - 1 minute
  • QA/feedback

Speaker bio

Kushal Das is a public interest technologist, who is a maintainer of the SecureDrop project, and part of Tor Project core team. He is a CPython core developer, and also a director in Python Software Foundation. He has given talks in various conferences including previous PyCons (and once in a previous version of rootconf), a list of such talks is in

Kushal is currently working as a staff member of the Freedom of the Press Foundation.


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Hosted by

Rootconf is a community-funded platform for activities and discussions on the following topics: Site Reliability Engineering (SRE). Infrastructure costs, including Cloud Costs - and optimization. Security - including Cloud Security. more