DJ Meph djmeph

Deploy Kubernetes and Rancher on a Rasperry Pi 5 Cluster

Permalink x.djmeph.net/k8s

I purchased three 8GB Raspberry Pi 5s with 128GB 96mb/s microSD cards to build my first Kubernetes cluster, and as expected, I ran into a lot of problems with the newness of the Pi 5. I have been working with Kubernentes professionally for exactly one year now, so for me this was about learning how to create my own cluster from the ground up to fill in the gaps of knowledge of the infrastructure that has been provided to me.

I have since upgraded this cluster to 7 nodes with 512GB storage each.

Many tutorials and examples exist on building a Raspberry Pi K8S cluster. The problems I ran into were mostly in two categories:

2020-03-17 Coronavirus/Covid-19 News

Permalink: https://x.djmeph.net/cv

Facebook took down my original post, so I'm putting this in a gist and trying to re-circulate.

TL;DR:

Infection rates are decreasing in China
India is successfully treating COVID-19 and minimizing mortality rates

Keybase proof

I hereby claim:

I am djmeph on github.
I am djmeph (https://keybase.io/djmeph) on keybase.
I have a public key ASAFX-4QrqH0BpcV5K2Ut35cjWpgTFhF56A3LLJDM2tHvgo

To claim this, I am signing this object:

Node.js Express API Workshop

Permalink: https://x.djmeph.net/ao

API:

https://github.com/djmeph/api-development-workshop

Companion App:

https://github.com/djmeph/api-workshop-companion

Open Source Music Coding

Permalink

https://x.djmeph.net/mc

Code Repositories

Sonic Pi

Photographing a Supermassive Black Hole

Permalink

https://x.djmeph.net/bh

Sources

The bulk of the presentation was extrapolated from Katie Bouman's 1 hour presentation at Caltech titled, Imaging a Black Hole with the Event Horizon Telescope.

Node.js Detroit Meetup 2019-01-16

Useful Lambda Utilities for AWS's free tier

Permalink https://x.djmeph.net/af

Geolocation Search API:

https://x.djmeph.net/ab

Geolocation API Companion App:

https://x.djmeph.net/ad

Nodej.s Meetup - Geospatial Indexing

Permalink: https://naked.bike/gs

MongoDB Example: https://github.com/djmeph/geospatial-indexing-mongodb

Companion App: https://github.com/djmeph/geospatial-indexing-angular

GeoRadius Function: https://gist.github.com/djmeph/30262c4591f46eeaa7c75d8af8c6493d

Radically Self-Reliant Crypto Bot Workshop

Permalink: https://naked.bike/45

Launch Ubuntu 16.04 EC2 Instance

Select Ubuntu Server 16.04 LTS 64-bit
Recommend General Purpose - t2.small instance type. (1 CPU core, 2GB RAM)
Select a subnet. us-east-1x, us-east-2x, us-west-2x are $0.023/hr for t2.small
Select 8GB GP2 SSD ($0.80/month)

	module.exports = (coord, brng, dist) => {
	dist = dist / 3958;
	brng = brng.toRad();
	var lat1 = coord[1].toRad(), lon1 = coord[0].toRad();
	var lat2 = Math.asin(Math.sin(lat1) * Math.cos(dist) + Math.cos(lat1) * Math.sin(dist) * Math.cos(brng));
	var lon2 = lon1 + Math.atan2(Math.sin(brng) * Math.sin(dist) * Math.cos(lat1), Math.cos(dist) - Math.sin(lat1) * Math.sin(lat2));
	if (isNaN(lat2) \|\| isNaN(lon2)) return null;
	return [lon2.toDeg(), lat2.toDeg()];
	}