Kranzes

Initial checks

Start by checking that there aren't any previous ssh keys inside the FIDO2 authenticator of your YubiKey. You can check if they exist by running the command below:

nix shell nixpkgs#yubikey-manager -c ykman fido credentials list

If the command above outputs a string mentioning "ssh" or "openssh", then you have already got a key generated and store on your YubiKey.

Evaluating additional authentication factors

Before generating a new ssh key to store on your YubiKey you must consider which additional required authentication factors you want to use. Below you can see a table with the available factors and their corresponding command:

noteed

Notes about caching Nix builds

You can use Cachix (I haven't tried it yet but people are happy with it), or spend time like I do crawling through similar notes.

I have to put back my notes in order, because of this tweets: https://twitter.com/noteed/status/1285875859468029958

It turns out I did use a cache on Digital Ocean Spaces in the past, but I didn't have much notes.

Links

kevb

Snippet from docker-compose:

secrets:
  - source: "docker_secrets_expand"
    target: "/docker_secrets_expand.sh"
    mode: "0555"
  - db_password
environment:
 DB_PASSWORD:DOCKER-SECRET->db_password

StevenACoffman

Mistakes to Avoid: Docker Antipatterns

Whichever route you take to implementing containers, you’ll want to steer clear of common pitfalls that can undermine the efficiency of your Docker stack.

Don’t run too many processes inside a single container

The beauty of containers—and an advantage of containers over virtual machines—is that it is easy to make multiple containers interact with one another in order to compose a complete application. There is no need to run a full application inside a single container. Instead, break your application down as much as possible into discrete services, and distribute services across multiple containers. This maximizes flexibility and reliability.

Don’t install operating systems inside Docker containers

It is possible to install a complete Linux operating system inside a container. In most cases, however, this is not necessary. If your goal is to host just a single application or part of an application in the container, you need to install only the essential

ohze

#!/bin.sh

DOCKER_COMPOSE_VERSION=1.14.0

# Download docker-compose to the permanent storage
echo 'Downloading docker-compose to the permanent VM storage...'
sudo mkdir -p /var/lib/boot2docker/bin
sudo curl -sL https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` -o /var/lib/boot2docker/bin/docker-compose
sudo chmod +x /var/lib/boot2docker/bin/docker-compose
sudo ln -sf /var/lib/boot2docker/bin/docker-compose /usr/local/bin/docker-compose

eneko

#!/usr/bin/env sh
set -e

echo "Pulling latest code..."
git pull
echo "Deleting local branches that were removed in remote..."
git fetch -p 
git branch -vv | awk '/: gone]/{print $1}' | xargs git branch -D
echo "Remaining local branches:"
git branch -vv

dianjuar

Install WordPress plugins directly (without FTP)

Ref Stack Overflow Comment

Put this on your wp-config.php

/* That's all, stop editing! Happy blogging. */
define('FS_METHOD', 'direct');

tmslnz

Install dnsmasq

Via brew or other method

Set up DNS resolver order

In order to work on every connection and on any TLD, dnsmasq needs to be the first DNS resolver receving the query.

And since dnsmasq is a local process, all DNS queries need to go to 127.0.0.1

On macOS, /etc/resolv.conf is automaticaly created, depending on a variety of things (network settings, etc), so it cannot be edited.

subfuzion

Overview

It's easy enough to set up your machine as a swarm manager for local development on a single node swarm. But how about setting up multiple local nodes using Docker Machine in case you want to simulate a multiple node environment (maybe to test HA features)?

The following script demonstrates a simple way to specify the number of manager and worker nodes you want and then bootstrap a swarm.

You can also check out the sample as a Github project here.

ursuad

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...