pdcastro

About

These instructions were written in response to a specific support request for the installation of balenaOS on an Intel NUC device. These steps are not normally required. The standard balenaOS installation instructions for the NUC can be found at: https://www.balena.io/docs/learn/getting-started/intel-nuc/nodejs/

Steps to manually delete the partition table in a NUC device using the parted command-line tool

Note: scroll down for the screenshots!

• Download an amd64 Ubuntu installer ISO image file. I've chosen the small (67MB instead of 2GB) "mini.iso" network installer from: http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/

pdcastro

# Sample Dockerfile for installing balena-cli on Ubuntu Bionic
# Usage:
#     $ docker build -t cli .
#     $ docker run -it --privileged --network host -v /var/run/docker.sock:/var/run/docker.sock cli
FROM ubuntu:18.04
# install dependencies - don't install nodejs or npm via apt-get!
RUN apt-get update && apt-get install -y curl git python g++ make
ENV NODE_VERSION v12.20.2
ENV NVM_DIR /usr/local/nvm
ENV PATH $NVM_DIR/versions/node/$NODE_VERSION/bin:$PATH

pdcastro

FROM balenalib/%%BALENA_ARCH%%-debian-node:10.16-jessie-build as build
WORKDIR /usr/src/app
COPY . .
# CMD ["npm", "start"]
CMD ["/usr/local/bin/node", "index.js"]

pdcastro

FROM eu.gcr.io/buoyant-idea-226013/arm32v7/busybox
RUN uname -a
CMD while : ; do echo "(Plain Dockerfile 3) $(uname -a)"; sleep ${INTERVAL=5}; done

pdcastro

FROM balenalib/%%BALENA_MACHINE_NAME%%-python:3
RUN apt-get update && apt-get install kbd git patch
RUN mkdir -p /usr/src/mydash
WORKDIR /usr/src/mydash
RUN git clone https://github.com/boppreh/keyboard
COPY keyboard.patch /usr/src/mydash/keyboard/
RUN cd keyboard && patch -p1 < keyboard.patch
ENV PYTHONPATH="/usr/src/mydash/keyboard:${PYTHONPATH}"
CMD python keyboard/examples/stdin_stdout_events.py

pdcastro

#!/bin/bash

...

fix_route () {
  good_wifi=$(ip route | perl -ne '/default\s+via\s+(\S+).+?metric\s+600/; if ($1) {print $1; exit}')
  good_eth0=$(ip route | perl -ne '/default\s+via\s+(\S+).+?metric\s+100/; if ($1) {print $1; exit}')
  bad_eth0=$(ip route | perl -ne '/default\s+via\s+(\S+).+?metric\s+20100/; if ($1) {print $1; exit}')
  # if there are no good routes with metrics 100 or 600, and there is a "bad"
  # route with metric 20100, assume the bad route is actually good and use it

pdcastro

#!/usr/bin/env bash

# Provision an Ubuntu or similar system as an openBalena "local machine"
# Tested with Ubuntu 20.04 LTS

set -eo pipefail # quit this script on errors

CERT_PATH="/usr/local/share/ca-certificates/openbalena.crt"
INSTALL_DIR="/opt"
CLI_BIN_PATH="/usr/local/bin/balena"

pdcastro

#!/usr/bin/env python3
import fileinput, sys

exitCode = 0

for line in fileinput.input():
    if line.startswith('REMOTE_EXIT_CODE='):
        exitCode = int(line.split(sep='=', maxsplit=1)[1])
    else:
        print(line, end='')

pdcastro

balenaOS in a libvirt / qemu / kvm virtual machine

Successfully tested with Ubuntu 20.04 as the host OS in 2 quite different "environments":

• Intel NUC machine (bare metal) on my desk.
• Google Cloud Compute Engine instance:
  • Instance type: 'n2-standard-2', 8GB RAM, 2 vCPUs (Intel Cascade Lake), 10GB disk
  • Nested virtualization enabled as per docs:
    • https://cloud.google.com/compute/docs/instances/nested-virtualization/overview
• https://cloud.google.com/compute/docs/instances/nested-virtualization/enabling

pdcastro

#!/bin/bash

# Get a full container name given its short service name.
# The full container name can then be used as argument for
# the `balena-engine exec` command.
#
# Usage instructions:
#
# * Save this file somewhere, e.g.:
#   $ vi /tmp/get_container_name.sh