This report covers the activity of Tails in October 2016. It is the final report for our current contract with OTF. We want to thank OTF for their support, that enabled us to deliver a large set of improvements to various people, including: Tails users, Tails contributors, users of Debian and its numerous derivatives, Thunderbird users, and more!

Everything in this report is public.

A. Replace Claws Mail with Icedove

  • A.1.1. Secure the Icedove autoconfig wizard

    As reported last month, this work has been merged, and this deliverable is now completed.

  • A.1.2. Make our improvements maintainable for future versions of Icedove

    As reported last month, this deliverable was completed: our patches were submitted to Thunderbird upstream, and we keep working with them to make sure that all users of Thunderbird benefit from a safer configuration wizard.

B. Improve our quality assurance process

B.3. Extend the coverage of our test suite

  • B.3.11. Fix newly identified issues to make our test suite more robust and faster

    After having worked on this continuously for over a year, our test suite runs faster despite testing more cases than before; also, it reports much fewer false positives. We now are in a state where we can rely on its results as intended:

    • When reviewing someone else's work, automated testing results allows us to quickly rule out many classes of regressions.
    • When introducing new features and bug fixes in general, they make us a lot more comfortable.

    That said, we clearly underestimated the amount of work needed for the robustness part of this deliverable, and there are some outstanding issues still remaining before we could have no false positives at all. However, it should be stressed that the issues are rare enough that the automated test suite still is as useful as described in the previous paragraph, so we consider this a success nevertheless.

    This deliverable is now completed.

  • B.3.12. Reliably wait for post-Greeter hooks (#5666)

    This work has been merged, so this deliverable is now completed.

  • B.3.14. Write tests for incremental upgrades (#6309)

    This work has been merged, so this deliverable is now completed.

C. Scale our infrastructure

C.1. Change in depth the infrastructure of our pool of mirrors

We completed the remaining bits of this deliverable, and deployed everything to production:

  • C.1.2. Write & audit the code that makes the redirection decision from our website (#8639, #8640, #11109)

    • mirror-dispatcher.js: our security auditor did a final security review, and approved this code.

    • Download And Verification Extension (DAVE) for Firefox: our code to use our new mirror pool when downloading Tails ISO images was completed, merged, released and made it into Mozilla's stable channel.

    This deliverable is now completed.

  • C.1.6. Adjust download documentation to point to the mirror pool dispatcher's URL (#8642, #11329, #10295)

    This was completed back in May.

  • C.1.8. Clean up the remainers of the old mirror pool setup (#8643, #11284)

    This deliverable was completed as well.

C.4. Maintain our already existing services

C.4.6. Administer our services upto milestone VI

We kept on answering the requests from the community, and taking care of security updates.

New pieces of infrastructure

  • We created a virtual machine that will be used to experiment with our upcoming web translation platform. This allows us to try separating system administration from services administration: we want to allow other Tails contributors to set up and maintain the services they need, which will make our system administrators less of a bottleneck :)

  • We finished taking over from Riseup the system that hosts our ticket tracker: #11855, #11805, #11843, #11844.

Performance and resource usage improvements

  • We made more progress on optimizing I/O settings for virtual machines running on our main server (#11817). Our short-term goal was to get better performance out of our current hardware, and we are calling this a success: we have lowered IO wait times, and improved disk throughput. This also allowed us to learn more about the capacity of our actual setup so we can specify the hardware to purchase in 2017.

  • Our new APT snapshots system generates about 7GB of data for every Tails release. We implemented de-duplication for this data, which will cut down storage costs on the long term, and makes the backup process smoother on the short term.

Security improvements

  • We have changed the way we create virtual machines to make it safer, thanks to a new feature in di-netboot-assistant that was implemented after we requested it.

  • We have enabled HTTPS on (almost) all the sub-domains of, thanks to Let's Encrypt. This allowed us to proceed with the next steps that will eventually result in adding to the Chrome HSTS preload list (that is used by other major web browsers as well).

Workflow improvements

  • We started setting up a replica of our automated ISO builds and tests infrastructure. This lead to quite some refactoring of our Puppet code. It will allow us to develop infrastructure changes more easily outside of our production environment.

Porting our infrastructure to new versions of the technologies it uses

  • We started to implement our plan to migrate our infrastructure to Puppet 4, proceeding with the first step that was upgrading our Puppet master and clients to 3.8. Then we quickly tried to stop stringifying Puppet facts but had no time to deal with the fallout, so we reverted this change and documented what the next steps are.
  • We fixed the way our test suite handles the pluging and unplugging of DVD devices, as well as the ejection of the ISO image, to adapt to compatibility issues between QEMU 2.7 and Jessie's libvirt on this matter.

Bug fixes

  • We (most likely) fixed a bug that sometimes prevented Jenkins jobs from being created or updated.

Future plans

  • We identified new aspects of our systems that need to be monitored: #11870, #11858.

  • We want to improve the reliability of our continuous integration system, by relying less on remote network resources: #11869.

  • We started thinking about better ways to handle our servers' logs and making plans.

E. Release management

E.1.12. Tails 2.5

As reported about a couple months ago, Tails 2.5 was released on August 2. Meanwhile, Tails 2.6 was released on September 20.