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Deploy K3s and Rancher on Raspberry Pi 4 cluster

Today I tried to setup a small Kubernetes cluster on top of 3 Raspberry Pi 4 (4GB Memory). Here is the steps to install the cluster.

Preparation

I have 3 Raspberry Pi 4 stacked with PoE headers and connected to a PoE switch at home. The are connected to Internet through a home router. All Pis are equipped with a 64GB Samsung SDXC card flushed with Ubuntu 20.04 image.

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AWSTemplateFormatVersion: 2010-09-09
Parameters:
  stackID:
    Type: String
    AllowedPattern: '^[a-zA-Z0-9-]+$'
  DomainName:
    Type: String
    AllowedPattern: '.*'
  route53HostedZoneId:
    Type: String

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/*
I was curious as to whether it was possible to make resources
created using CDK constructs work with raw CloudFormation
resources and vice versa.

This aws-cdk app demonstrates a VPC and an ELB that belongs to it
in different, dependant stacks, leveraging CFN outputs / imports,
and leveraging CDK's method of passing information from one
stack to another.
*/

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Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

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React Native + macOS + Clojurescript

Project Catalyst

Since the recent release of Catalina, macOS has shipped with the ability to allow iOS/iPAD apps to run on macOS without any modification via a featureset known as Project Catalyst.

This is exciting, as writing React Native + Clojurescript apps as a target for the desktop is much more compelling than a pure Electron app (imo).

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./AaronO/go-git-http/.git
./ActiveState/tail/.git
./adriaandejonge/helloworld/.git
./ajhager/engi/.git
./ajstarks/svgo/.git
./andelf/go-curl/.git
./apcera/nats/.git
./armon/circbuf/.git
./armon/consul-api/.git
./armon/consul-kv/.git

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Some Jenkinsfile examples

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Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start
sudo usermod -a -G docker ec2-user

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Reading

1. Go through the tour at https://tour.golang.org/welcome/1
2. Promptly abandon all of those plans you have to use channels everywhere
3. Read the language spec once over: https://golang.org/ref/spec
4. https://dave.cheney.net/2017/04/26/understand-go-pointers-in-less-than-800-words-or-your-money-back
5. Read Effective Go: https://golang.org/doc/effective_go.html
6. Read CodeReviewComments (essentially a semi-official style guide) https://github.com/golang/go/wiki/CodeReviewComments
7. http://devs.cloudimmunity.com/gotchas-and-common-mistakes-in-go-golang/
8. https://coder.today/tech/2018-11-10_profiling-your-golang-app-in-3-steps/ This is a very effective tool in your toolbelt, and you will use it A LOT.
9. And a smattering of other good articles:

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[alias]

  ##
  # One letter alias for our most frequent commands.
  #
  # Guidelines: these aliases do not use options, because we want
  # these aliases to be easy to compose and use in many ways.
  ##

  a = add