juniorz

require 'rubygems'
require 'nokogiri'
require 'fileutils'
require 'date'
require 'uri'

# usage: ruby import.rb my-blog.xml
# my-blog.xml is a file from Settings -> Basic -> Export in blogger.

data = File.read ARGV[0]

juniorz

How to setup a tailscale router

On Unifi Cloud Gateway Ultra

Product: https://eu.store.ui.com/eu/en/products/ucg-ultra
Quad-core ARM® Cortex®-A53 at 1.5 GHz
3 GB RAM

Tailscale can be installed as per instructions for linux (both stable and unstable builds).

juniorz

Keep-Alive

time telnet www-org.example.com 80

GET / HTTP/1.1
Host: www-org.example.com
Connection: keep-alive

(wait)

juniorz

# Some good references are:
# http://russbrooks.com/2010/11/25/install-postgresql-9-on-os-x
# http://www.paolocorti.net/2008/01/30/installing-postgis-on-ubuntu/
# http://postgis.refractions.net/documentation/manual-1.5/ch02.html#id2630392

#1. Install PostgreSQL postgis and postgres

brew install postgis
initdb /usr/local/var/postgres
pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start

juniorz

Test file generated for sysdig homebrew formula

This is how it was generated

$ mkdir -p /tmp/sysdig && cd /tmp/sysdig
$ sudo sysdig -w sample.scap evt.type=open and fd.name contains /tmp/sysdig

The test performed should be

$ sudo sysdig -r sample.scap evt.type=open fd.name contains /tmp/sysdig/sample.scap

juniorz

"Those that know, do. Those that understand, teach."

Aristoteles (supposedly)

Scope: Building and running web-scale distributed cloud systems with container technologies :P

Learning goals

• Establish the challenges for engineering cloud-native systems (the problem space).
• Establish the approaches to address those challenges (the solution space).

juniorz

Tecnology and Society

• http://appropriatingtechnology.org/?q=node/296

Kubernetes autoscaling

• kubernetes/kubernetes#1629
• https://github.com/kubernetes/community/blob/master/contributors/design-proposals/autoscaling/horizontal-pod-autoscaler.md
• https://github.com/kubernetes/community/blob/master/contributors/design-proposals/autoscaling/vertical-pod-autoscaler.md
• Scale to/from zero

juniorz

Software development hard truths

• Continuous Integration is a software development discipline, not your orchestrator tool.
• Branch-by-abstraction and trunk-based development is the right superior answer for adopting CI (https://twitter.com/jezhumble/status/1220036153488756736)
• Feature branches and PR features goes against the grain with adopting CI.
• Pair programming is hard and works (https://martinfowler.com/articles/on-pair-programming.html).
• "Success creates its own truth" (https://longreads.com/2020/08/20/how-to-learn-everything-the-masterclass-diaries/). Be wary of the gospel preached on a famous/pupular/successful person/company's blog post. Can their life lessons be applied to your (or someone else's) reality?

juniorz

• Dead Space development struggling to integrate changes from multiple teams/experts: https://youtu.be/BQ3iqq49Ew8?t=655
• Desktop apps: once in a while you kill a process eating all you RAM. Web apps: once in a while you kill the Google Chrome GPU task eating all your RAM after you open a GIF.
• Today's browser wars: migrating a customer's 100s open tab from Chrome to Firefox/Edge/Opera/Safari.
• Why it is important to make experimention cheap.
  • If it is hard to experiment (time and space) and it requires coordination and help, people willl be reluctant to throw bad experiments away.
  • https://youtu.be/WFu1utKAZ18?t=916
  • https://youtu.be/WFu1utKAZ18?t=1778
• The origin of Control Plane vs Data Plane and how the concept influenced UNIX design

juniorz

package xmpp

import (
	"errors"
	"fmt"
	"log"
	"net"
	"net/url"

	"github.com/miekg/dns"