philandstuff

Devopsdays London 2017

initial session, bob walker (@rjw1)

• welcome everyone!
• we have a code of conduct
• thanks to organisers, sponsors, etc

Humane Teams at home and around the world

philandstuff

trying to implement consistency checking on my prison RSF poller

I wrote a thing to keep the prison index service prototype up-to-date. It works by polling the RSF for updates, and only downloads new entries.

However, the prison register is in discovery and I’m told it will be deleted and reloaded (possibly a number of times). This means that if I only download entries from the last entry number I saw, I’ll miss the entries which have been completely rewritten.

philandstuff

#!/usr/bin/env python3

def regex_for(required_letters):
    # special cases for 1 and 2 letters, to keep things a bit tidier
    if len(required_letters) == 1:
        return required_letters[0]
    if len(required_letters) == 2:
        x,y = required_letters
        return "%s.*%s|%s.*%s" % (x,y,y,x)
    subregexes = []

philandstuff

========================================================================== FAILURES ===========================================================================
______________________________________________________ test_audit_proofs_are_valid_with_alternative_impl ______________________________________________________

    @given(st.lists(st.binary(), max_size=99), st.integers(min_value=0, max_value=99))
>   def test_audit_proofs_are_valid_with_alternative_impl(data, leafIndex):

tests/test_verifiable_log.py:146: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/nix/store/s5f9zba6xbrjqxmmnjikwndqg9wk2xvr-python3.5-hypothesis-3.5.2/lib/python3.5/site-packages/hypothesis/core.py:524: in wrapped_test
    print_example=True, is_final=True

philandstuff

possible ideas for serialisation formats

This gist has some possible formats:

jsonl with inline items

This is the format from the first spike.

jsonl with items encoded as strings

philandstuff

csv,conf,v2

Ben Foxall, Serving CSV from the browser

• @benjaminbenben @pusher

why do I love CSV?

• accessibility - don’t need specialized programs
• it’s the start of something, not the end

philandstuff

mark shuttleworth, juju

q&a

• security?
  • same issue as docker images from dockerhub
  • http://twitter.com/nixgeek/status/694103481909649409

mitchellh, vault

philandstuff

nix-build -E '<nix-expr>'

philandstuff

Deploying certificate-transparency to a docker container using nix

On the nixos/nix docker container

Fisrt, download and run the nixos/nix image:

docker run -ti nixos/nix /bin/sh

Subscribe to the nixos channel (eventually, certificate-transparency will be available on the nixpkgs channel too but as of 2015-12-14 it's not):

philandstuff

Kush, an introduction to schedulers

about me

• I work for GDS
• Cabinet Office
• we started by building GOV.UK
  • replaced older sites like direct gov, business link
• we’re not just fixing websites
  • we also build and run digital services
  • working with depts across the country
  • eg: register to vote