grahamwhaley

Getting your Pi Pico to reflash from Linux Arduino IDE

I picked up some Pi Picos, because well, bang per buck they are looking good - fairly powerful, very cheap.

I'm a Linux user. I tend to do my simpler embedded development under the Arduino IDE. Well, the Pi Picos have Arduino IDE support, so great...

But, life was not quite that simple. I went with the 'official' Pico MBED tool set as found in the IDE installation options. But when I tried to load a sketch, it errored out. The rp2040load command failed.

grahamwhaley

grahamwhaley

Running nanovna-saver under Docker

I have a nanovna, which I want to use with Linux. Great, probably the best UI out there for the nanovna - nanovna-saver supports use under Linux - it is a Python Qt based app....

So, I tried it on my Ubuntu 18.04 machine. Sigh, it requires Python v3.7, and afaict, that is a royal pain to get working on 18.04 - well, it was for me anyway. I got stuff installed and linked over etc., and could still not run nanovna-saver locally... what to do?

grahamwhaley

grahamwhaley

Plugwise Source under Wine

This document covers my attempts to get the Plugwise Source Windows program running under Linux Wine.

SPOILER - it can be made to run, but you cannot communicate with the USB dongle, so it's a 'no go' for now.

Components

First, we'll detail the versions of the components used, as the ability to make this work is likely

grahamwhaley

I wanted to copy an index in my elasticsearch DB, so I could try and re-open it in Kibana whilst ticking the 'not a time series database' option. So, how to copy an index??

I found a useful post at http://david.pilato.fr/blog/2015/05/20/reindex-elasticsearch-with-logstash/ That copies an index from one elastic to another, and is written for an older version of logstash. Updating that to logstash ~7.3 and modifying to copy an index to a new index of a different name in the same DB, I came up with:

# Logstash config to copy one index to another

grahamwhaley

Simple elastic/json setup

I've had to do this twice now, as I lost my info from the first time around. So, let's write it down...

Run up elastic in docker

First, let's run up elastic. Elastic give you info on how to do this on their site. I ended up firing a small docker compose:

version: '2'

grahamwhaley

#!/bin/bash
# Copyright (c) 2019 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#


# applies kata-deploy to the default kubectl cluster

set -e

grahamwhaley

How to use jenkinsfile-runner

Developing pipeline jenkinsfiles can be painful. It is slightly easier if you use the jenkinsfile runner to run them locally.

Here is the script I have been using to do that for some in-dev Jenkinsfiles. Writing down as there are some subtleties here that it is going to be easy to lose and hard to re-create.

#!/bin/bash

grahamwhaley

How to config k8s to have many pods (on a node)

I had a need (understand this is for some testing, not for a real deployment ;-) ) to run a lot of pods (like >=1k of them) on a single k8s node. Now, I had the hw available - 88cores and 377Gb of RAM - but, k8s has some inbuilt limits by default that will not let you launch more than 110 pods, and if you get past that, you'll hit a network limit at about 250 pods... so, before I forget, here is how to configure to run more...

kubeadm

In your kubeadm init file, something like: