ouyi

setInterval(() => { window.scrollTo(0, document.body.scrollHeight); window.scrollTo(0, 0); }, 60000)

ouyi

# Install docker
yum check-update
curl -fsSL https://get.docker.com/ | sh
systemctl start docker
systemctl status docker
systemctl enable docker
systemctl status docker

# Set up the server-side of things

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# https://apt.syncthing.net/

# Add the release PGP keys:
curl -s https://syncthing.net/release-key.txt | sudo apt-key add -

# Add the "stable" channel to your APT sources:
echo "deb https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list

# Update and install syncthing:
sudo apt-get update

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#!/usr/bin/env bash

# Display the CPU and GPU temperatures of Raspberry Pi 3B+ 

set -e

cpu_temp=$(</sys/class/thermal/thermal_zone0/temp)
cpu_temp=$(printf %.1f $((10 * cpu_temp/1000))e-1)

gpu_temp=$(vcgencmd measure_temp)

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# https://github.com/AdguardTeam/AdGuardHome/wiki/Raspberry-Pi

cd $HOME
wget https://static.adguard.com/adguardhome/release/AdGuardHome_linux_arm.tar.gz
tar xvf AdGuardHome_linux_arm.tar.gz

cd AdGuardHome
sudo ./AdGuardHome -s install

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Char    Unicode
---------------
Ä       \u00c4
ä       \u00e4
Ö       \u00d6
ö       \u00f6
Ü       \u00dc
ü       \u00fc
ß       \u00df

ouyi

# --- Join strings ---
function join_by { local IFS="$1"; shift; echo "$*"; }
# join_by ',' foo bar baz
# https://serverfault.com/questions/311856/portable-unix-way-to-join-strings-with-separator

echo -e "a\nb\nc" | tr '\n' ',' | sed 's/,$//g' # a,b,c

# --- Misc ---

# Retrieve the directory where the current script is in

ouyi

Lessons learned

I. Software engineering

1. Automate everything, have CI/CD and test automation from the beginning
2. Security shall not be an afterthought (have TLS and avoid plain text passwords from the start)
3. Component shall be stateless, state shall be extracted and kept in a external store (key-value store or databases)
4. Favor open source and off-the-shelf solutions instead of building proprietary solutions
5. Avoid hard-coding dependencies, try to inject them via command line parameters, configuration files, env variables, etc

ouyi

from kafka import KafkaProducer

producer = KafkaProducer(bootstrap_servers=['localhost:19092'])
data = bytes('hello', encoding='utf-8')
producer.send('test', value=data)

from kafka import KafkaConsumer

consumer = KafkaConsumer('test', bootstrap_servers=['localhost:19092'], consumer_timeout_ms=2000, auto_offset_reset='earliest')
event = next(consumer)

ouyi

# --- Maven ---

# Skip test execution
mvn package -DskipTests

# Skip test compilation
mvn package -Dmaven.test.skip=true

# Retrieve the project version