Oleg Dolya grengojbo

Checking your Raspberry Pi's view of its power supply

Sometimes it seems like the first (and sometimes only) advice you get offered for almost any problem with a Raspberry Pi is "check your power supply". You think something like:

"hey, I'm using an official power supply sold as being matched with my Pi so how can there be any problem?"

You look up the specs then stick a controlled load across your supply and confirm that it can deliver the required number of Watts.

Yet your problems persist…

Kubernetes on Hypriot

These are instructions for standing up a Kubernetes cluster with Raspberry Pis with the current Hypriot (1.9.0), with K8S v1.10.5

Thanks to https://gist.github.com/alexellis/fdbc90de7691a1b9edb545c17da2d975 and https://gist.github.com/aaronkjones/d996f1a441bc80875fd4929866ca65ad for doing all the hard work!

Pre-reqs:

This was done using a cluster of 5 RPi 3 B+
All Pi's are connected via a local ethernet switch on a 10.0.0.0/24 LAN

This guide has moved to a GitHub repository to enable collaboration and community input via pull-requests.

https://github.com/alexellis/k8s-on-raspbian

Alex

SORACOM Air + Raspberry Pi + L-05Aを使ったインターネット接続の設定.md

wvdial設定

$ sudo apt-get remove --purge usb-modeswitch
$ sudo apt-get install -y eject wvdial dnsutils
$ sudo vi /etc/wvdial.conf

[Dialer Defaults]

コマンド

set policy route PPPOE-IN rule 10 destination address 0.0.0.0/0
set policy route PPPOE-IN rule 10 protocol tcp
set policy route PPPOE-IN rule 10 tcp flags 'SYN,!ACK,!FIN,!RST'
set policy route PPPOE-IN rule 10 set tcp-mss 1414
set interface ethernet eth0 policy route PPPOE-IN

	CREATE TABLE large_test (num1 bigint, num2 double precision, num3 double precision);

	INSERT INTO large_test (num1, num2, num3)
	SELECT round(random()10), random(), random()142
	FROM generate_series(1, 20000000) s(i);

	EXPLAIN (analyse, buffers)
	SELECT num1, avg(num3) as num3_avg, sum(num2) as num2_sum
	FROM large_test
	GROUP BY num1;

	consul..runtime.
	name="consul_runtime"
	type="$2"
	host="{{ inventory_hostname }}"

	consul.runtime.total_gc_pause_ns
	name="consul_runtime_total_gc_pause_ns"
	type="$2"
	host="{{ inventory_hostname }}"

	#!/bin/bash -e
	fleetctl list-units -fields=unit -no-legend \| grep -v -e '@\\|deis' \| cut -d. -f1-2 \| sort \| uniq \| while read name ; do
	max=$(fleetctl list-machines -no-legend \| wc -l)
	count=$(fleetctl list-units -fields=unit -no-legend \| grep -e "^$name" \| wc -l)
	if [ $count -gt $max ]; then
	echo "Skipping $name, there are $count deployed units on $max fleet machines"
	else
	echo "Processing $name"
	fleetctl list-units -fields=unit -no-legend \| grep -e "^$name" \| while read service; do
	others=$(echo $service \| cut -d. -f1-2)

	'use strict';

	// simple express server
	var express = require('express');
	var app = express();
	var router = express.Router();

	app.use(express.static('public'));
	app.get('/', function(req, res) {
	res.sendfile('./public/index.html');

	$ docker run --rm busybox date
	Thu Mar 20 04:42:02 UTC 2014
	$ docker run --rm -v /etc/localtime:/etc/localtime busybox date
	Thu Mar 20 14:42:20 EST 2014
	$ FILE=$(mktemp) ; echo $FILE ; echo -e "Europe/Brussels" > $FILE ; docker run --rm -v $FILE:/etc/timezone -v /usr/share/zoneinfo/Europe/Brussels:/etc/localtime busybox date
	/tmp/tmp.JwL2A9c50i
	Thu Mar 20 05:42:26 CET 2014