Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Docker Swarming On Raspberry Pi Cluster #piday #raspberrypi @Raspberry_Pi

NewImage

Swarming Raspberry Pi part 1. via matthewkwilliams

Here’s the first in a series of building a robust docker swarm of raspberry pi hosts. This installment goes through installing the Pi(s), modifiying the Docker Daemon config, and starting up a test to verify that everyone can join the cluster.
The cluster which I am using consists of
• Raspberry Pi B+ x 5
• Raspberry Pi 2 B x 5

In order to verify that the cluster is working properly, there should be ten (10) members, five (5) of which have 4 cores.

Obtaining the OS and Setup
The wonderful folks at Hypriot have produced a raspberry image based on Raspbian, but with Docker 1.5.0. The image and instructions can be found at Heavily ARMed after major upgrade: Raspberry Pi with Docker 1.5.0 – Docker Pirates ARMed with explosive stuff.
Note: The image resizes itself to fit the card upon the first boot and then reboots. This takes a little bit (minutes at most). Just don’t be surprised when it reboots.

Hostnames
In order for this to work properly, the hosts need a unique name. It’s sometimes possible to configure DHCP to do this, but I went ahead and edited /etc/hostname myself since I wanted the most portability possible.
Like all good sysadmins, I am lazy. Doing the same thing over and over is boring. Besides, that’s what computers are for. So I wrote a script to make copies of the image and then edit the hostnames. Once that’s done I can then proceed to write the images to the SD cards.

The following script takes one argument, the location of the image you wish to modify — this should work for more than just Hypriot; it should work for just about any Rasberry Pi image. At present, it creates 10 instances and the NAME starts with apis-rpi- — you will likely want to change those. I may make the file a bit more generic at some point.

Full tutorial

998Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!



Adafruit has had paid day off for voting for our team for years, if you need help getting that going for your organization, let us know – we can share how and why we did this as well as the good results. Here are some resources for voting by mail, voting in person, and some NY resources for our NY based teams as well. If there are additional resources to add, please let us know – adafruit.com/vote

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 24,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — Ornaments to the rescue

Electronics — Keep track of those rails!

Python for Microcontrollers — Python on Microcontrollers Newsletter: CircuitPython 6 Release Candidate, new hardware & more! #Python #Adafruit #CircuitPython #ElectronicHalloween @micropython @ThePSF

Adafruit IoT Monthly — Matrix Portal, Solar Lawn Sprinkler and more!

Microsoft MakeCode — micro:bit version 2 Announced!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 10/14/2020 featuring Adafruit Grayscale 1.5″ OLED Graphic Display – STEMMA QT/Qwiic!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.