Stefan Thoss stefanthoss

A Short IPv6 Guide for Home IPv4 Admins

This guide is for homelab admins who understand IPv4s well but find setting up IPv6 hard or annoying because things work differently. In some ways, managing an IPv6 network can be simpler than IPv4, one just needs to learn some new concepts and discard some old ones.

Let’s begin.

First of all, there are some concepts that one must unlearn from ipv4:

Concept 1

Logging setup for FastAPI

This logging setup configures Structlog to output pretty logs in development, and JSON log lines in production.

Then, you can use Structlog loggers or standard logging loggers, and they both will be processed by the Structlog pipeline (see the hello() endpoint for reference). That way any log generated by your dependencies will also be processed and enriched, even if they know nothing about Structlog!

Requests are assigned a correlation ID with the asgi-correlation-id middleware (either captured from incoming request or generated on the fly). All logs are linked to the correlation ID, and to the Datadog trace/span if instrumented. This data "global to the request" is stored in context vars, and automatically added to all logs produced during the request thanks to Structlog. You can add to these "global local variables" at any point in an endpoint with `structlog.contextvars.bind_contextvars(custom

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

A Typical directory structure for running tests using `unittest`

Ref : stackoverflow

The best solution in my opinion is to use the unittest [command line interface][1] which will add the directory to the sys.path so you don't have to (done in the TestLoader class).

For example for a directory structure like this:

new_project

├── antigravity.py

	# THIS LINUX SETUP SCRIPT HAS MORPHED INTO A WHOLE PROJECT: HTTPS://OMAKUB.ORG
	# PLEASE CHECKOUT THAT PROJECT INSTEAD OF THIS OUTDATED SETUP SCRIPT.
	#
	#

	# Libraries and infrastructure
	sudo apt update -y
	sudo apt install -y \
	docker.io docker-buildx \
	build-essential pkg-config autoconf bison rustc cargo clang \

	export HADOOP_VERSION=2.9.1
	export SPARK_VERSION=2.3.2
	export AWS_ACCOUNT_ID=<your numeric AWS account id>
	export ECR_REGION=us-east-1
	# Fetch and extract the spark source
	curl -L "https://archive.apache.org/dist/spark/spark-${SPARK_VERSION}/spark-${SPARK_VERSION}.tgz" \| tar -xzvf -

	cd "spark-${SPARK_VERSION}"
	# set maven opts according to https://spark.apache.org/docs/latest/building-spark.html
	export MAVEN_OPTS="-Xmx2g -XX:ReservedCodeCacheSize=512m"

	import glob
	import pandas as pd

	# glob.glob('data*.csv') - returns List[str]
	# pd.read_csv(f) - returns pd.DataFrame()
	# for f in glob.glob() - returns a List[DataFrames]
	# pd.concat() - returns one pd.DataFrame()
	df = pd.concat([pd.read_csv(f) for f in glob.glob('data*.csv')], ignore_index = True)

	#!/bin/bash
	###########
	#
	# Batch convert DVD Videos with HandBrake CLI
	# The script will recursively look for "VIDEO_TS" folders and parse them
	#
	# Read this to understand:
	# https://mattgadient.com/2013/06/12/a-best-settings-guide-for-handbrake-0-9-9/
	# http://www.thewebernets.com/2015/02/28/easiest-best-optimal-settings-for-handbrake-dvd-video-conversion-on-mac-windows-and-linux/
	#

	Darrell Kienzle noted the following:

	I downloaded HDF 2.1 and tweaked my vagrant rig to load all the new stuff from HDF instead of HDP. There was one less storm dependency
	on HDF – no need for the “atlas_metadata” which HDP includes & requires. Anyway, when I tried to run the parser, I got the exception
	below.

	Long story short, it _looks_ like the submission is a two-step process now. First, it tries to do some fixups in
	ClientJarTransformerRunner” and output a tmp jar in /tmp. This is per:

	• STORM-1202: Migrate APIs to org.apache.storm, but try to provide some form of backwards compatability