anoopprasad

Using colima and Docker Engine on Apple Silicon (M1 Chip)

This tutorial uses Homebrew to install colima and Docker.

It was tested on Apple MacBook Pro (13-inch, M1, 2020) 8G and macOS Monterey version 12.1 (21C52).

Uninstall any Docker version

Make sure you have fully uninstall any versions of Docker. You can check using:

JWT Auth + Refresh Tokens in Rails

This is just some code I recently used in my development application in order to add token-based authentication for my api-only rails app. The api-client was to be consumed by a mobile application, so I needed an authentication solution that would keep the user logged in indefinetly and the only way to do this was either using refresh tokens or sliding sessions.

I also needed a way to both blacklist and whitelist tokens based on a unique identifier (jti)

Before trying it out DIY, I considered using:

Connect to ECS container

Requires

aws-cli - https://aws.amazon.com/cli/
jq - https://stedolan.github.io/jq/

Configure path to your ECS SSH key file ~/.bashrc

echo 'export ECS_PEM_FILE=$HOME/docker.pem' >> ~/.bashrc

	database: &default
	host: 127.0.0.1
	adapter: proxy_mysql2
	...

	# Check server process is using jemalloc
	# ref. [Japanese] https://tech.studyplus.co.jp/entry/2019/09/09/094140
	class AppController < ActionController::Base
	def show
	r = `strings /proc/#{Process.pid}/maps \| grep jemalloc`
	render plain: "<h1>#{ENV['LD_PRELOAD'].presence \|\| 'empty'}</h1><pre>#{r}</pre>"
	end
	end

	INSTALL JAVA
	$ sudo apt-get update && sudo apt-get install default-jre

	INSTALL ELASTIC SEARCH https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-repositories.html
	$ wget -qO - https://packages.elastic.co/GPG-KEY-elasticsearch \| sudo apt-key add -
	$ echo "deb https://packages.elastic.co/elasticsearch/2.x/debian stable main" \| sudo tee -a /etc/apt/sources.list.d/elasticsearch-2.x.list
	$ sudo apt-get update && sudo apt-get install elasticsearch
	$ sudo update-rc.d elasticsearch defaults 95 10
	$ sudo service elasticsearch restart
	$ sudo service elasticsearch status

	class Tree
	attr_reader :raw_data, :nodes, :tree

	def initialize(string)
	@raw_data = string
	@tree = {}
	end

	def format_data
	@nodes = raw_data.split("\n").map{ \|d\| n= d.split(','); { name: n[0], id: n[1], parent_id: n[2] } }

	##
	## This nginx.conf servers as the main config file for webflow reverse proxy
	##
	## RCS:
	## https://gist.github.com/sansmischevia/5617402
	##
	## Hardening tips:
	## http://www.cyberciti.biz/tips/linux-unix-bsd-nginx-webserver-security.html
	##

	#
	# Check for every table with temporal columns if there are records that have dates set to '0000-00-00'

	conn = ActiveRecord::Base.connection

	# get a list of tables and columns with a date type excluding merge tables
	query = "select concat(`table_schema`,'.',`table_name`) as table_name,`COLUMN_NAME` from information_schema.`columns` where data_type like '%date%' AND concat(`table_schema`,'.',`table_name`) not in (select concat(`table_schema`,'.',`table_name`) from information_schema.tables where engine='mrg_myisam');"
	list = conn.select_all( query )

	# transform the list a bit for later querying

	# Gemfile
	gem 'aws-sdk-s3'