Guilherme de Maio nirev

Speeding up Docker builds in CI

Every time a build starts in a new agent, the docker build cache is empty, and thus a docker build will need to rebuild the entire image from scratch.

To avoid this we can repopulate the docker cache when starting a build.

Without docker multi stage

If your build is not using multi-stage yet, re-populating the cache is easier.

Elastic Search Storage

The idea is to use a Elastic Search Data Stream https://www.elastic.co/guide/en/elasticsearch/reference/current/data-streams.html

Important concepts

Data Streams

A data stream is a way to handle time-series data (such as webhook logs) that

How to patch Android app to sniff its HTTPS traffic with self-signed certificate

requirements

apktool [1]

steps

Unpack apk file: apktool d app.apk
Modify AndroidManifest.xml by adding android:networkSecurityConfig="@xml/network_security_config" attribute to application element.
Create file /res/xml/network_security_config.xml with following content:

	#!/bin/bash +x

	# Source: http://www.gabsoftware.com/tips/automatically-reconnect-to-your-vpn-on-linux/

	# Description:
	# Make the script executable "chmod +x /path/to/the/script.sh
	# Put the script in .profile or .bashrc so it can be run on user login:
	# Example: echo "/path/to/the/script.sh start &" >> .bashrc
	# The script can be bound to shortcut keys with these commands:
	# /path/to/the/script.sh start # starts and monitors VPN connection

	ARG OTP_VERSION=22.0

	##################################################
	# Base - setup project and docker cache for build
	FROM erlang:${OTP_VERSION}-alpine as base

	# elixir expects utf8.
	ENV ELIXIR_VERSION="v1.9.1" \
	LANG=C.UTF-8

	ARG OTP_VERSION=22.0

	##################################################
	# Base - setup project and docker cache for build
	FROM erlang:${OTP_VERSION}-alpine as base

	# elixir expects utf8.
	ENV ELIXIR_VERSION="v1.9.1" \
	LANG=C.UTF-8

	%% -- ERLANG INET CONFIGURATION FILE --
	%% https://erlang.org/doc/apps/erts/inet_cfg.html
	%% use it by setting the following envvar:
	%% export ERL_INETRC="/path/to/this-file"
	%%
	%% read and monitor nameserver config from here
	{resolv_conf, "/etc/resolv.conf"}.
	%% increase cache size
	{cache_size, 2000}.
	%% specify lookup method

	function getBrowser() {
	const proxyHost = process.env.PROXY_HOST;
	const proxyPort = process.env.PROXY_PORT;
	const proxyServer = `${proxyHost}:${proxyPort}`;
	const browserlessToken = process.env.BROWSERLESS_TOKEN;

	if (LOCAL_DEBUG) {
	return puppeteer.launch({
	headless: false,
	devtools: false,

	# Get the logged in user's name
	CURRENT_USER="$(python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + "\n");')"

	# Get information necessary to display messages in the current user's context.
	USER_ID=$(id -u "$CURRENT_USER")
	if [[ "$OS_MAJOR" -eq 10 && "$OS_MINOR" -le 9 ]]; then
	L_ID=$(pgrep -x -u "$USER_ID" loginwindow)
	L_METHOD="bsexec"
	elif [[ "$OS_MAJOR" -eq 10 && "$OS_MINOR" -gt 9 ]]; then
	L_ID=USER_ID

	Originally from: http://erlang.org/pipermail/erlang-questions/2017-August/093170.html

	For a safe and fast Erlang SSL server, there's a few
	configuration values you might want by default:

	[{ciphers, CipherList}, % see below
	{honor_cipher_order, true}, % pick the server-defined order of ciphers
	{secure_renegotiate, true}, % prevent renegotiation hijacks
	{client_renegotiation, false}, % prevent clients DoSing w/ renegs
	{versions, ['tlsv1.2', 'tlsv1.1']}, % add tlsv1 if you must