kirushik

API versioning for HTTP REST interfaces (best practices)

We at SCC Team (and at SUSE in general) are providing more and more APIs with the wonderful HTTP REST approach. APIs evolve over time, often unexpectedly — so it makes sense to get into some API versioning best practices right from the day 0. I was asked to join Crowbar guys' discussion to share my SCC experience with versioning APIs. This article is an attempt to formalize our solution and prepare it for a wider audience.

So, imagine you have different API consumers out of your area of control. Some of them definitely will lag behind the latest release.

kirushik

Performance metrics, logging and monitoring for Docker-based deployments

Today every self-respecting developer thinks of microservices and containers. This approach significantly simplifies deployments and maintenance efforts, while shortening the development-to-production cycle length.

But there are some quite weakly addressed pain points on that route: we can reliably deploy a product as a swarm of weakly-linked containers, but we're lacking most of the usual tools to get insights of what's happening inside those containers|services, and how to debug and troubleshoot our production issues.

As a team in the middle of such transition, we at SCC have hit most of those issues:

• Any incoming request requires several containers to work in unison. How to log that work so it's easy to retrieve everything what happened on all the affected nodes?

kirushik

#!/usr/bin/env ruby
require 'find'

ACCESS_DENIED = ["$Recycle.Bin", "Documents and Settings", "Program Files", "Program Files (x86)", "ProgramData", ".", ".."]

def search(name, dirname = ".")
  Find.find(dirname).find do |path|
    ! ACCESS_DENIED.include?(File.basename(path)) &&
    ! File.directory?(path) &&
    File.basename(path) == name

kirushik

call plug#begin()
	Plug 'junegunn/seoul256.vim'
	Plug 'tpope/vim-sensible'

	"Plug 'benekastah/neomake'

	Plug 'Shougo/deoplete.nvim'
	Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }

	Plug 'leafgarland/typescript-vim', { 'for': 'typescript' }

kirushik

Testing 100vh and flexbox

A Pen by Le Roux Bodenstein on CodePen.

License.

kirushik

fn bin_reverse(n_orig: u32) -> u32 {
  let mut n = n_orig;

  n = ((n & 0xFFFF0000) >> 16) | ((n & 0x0000FFFF) << 16 );
  n = ((n & 0xFF00FF00) >> 8 ) | ((n & 0x00FF00FF) << 8 );
  n = ((n & 0xF0F0F0F0) >> 4 ) | ((n & 0x0F0F0F0F) << 4 );
  n = ((n & 0xCCCCCCCC) >> 2 ) | ((n & 0x33333333) << 2 );
  n = ((n & 0xAAAAAAAA) >> 1 ) | ((n & 0x55555555) << 1 );

  n

kirushik

defmodule Palindrome do
  def is_palindrome(x) do
    y = x |> Integer.to_char_list(2)
    y == Enum.reverse y
  end
end

1900..2100 |> Enum.filter &Palindrome.is_palindrome/1

kirushik

# Based on idan's script

function _git_branch_name
  echo (command git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
end

function _is_git_dirty
  echo (command git status -s --ignore-submodules=dirty ^/dev/null)
end

kirushik

APP_NAME:=ets_cache

UPSTREAM_GIT:=https://github.com/blinkov/ets-cache.git
UPSTREAM_REVISION:=96e9a2a7c16127b8f4d0bdb279e28bd5600e4265
RETAIN_ORIGINAL_VERSION:=true

ORIGINAL_APP_FILE=$(CLONE_DIR)/src/$(APP_NAME).app.src
DO_NOT_GENERATE_APP_FILE=true

kirushik

#!/bin/bash

REPO_ROOT=/srv/repo
PACKAGES_LOCATION=pool
METAINFO_LOCATION=$REPO_ROOT/dists/ubuntu/
RELEASE_FILE=$METAINFO_LOCATION/Release
PACKAGES_FILE=$METAINFO_LOCATION/testing/binary-amd64/Packages

cd $REPO_ROOT