TFM IOT – Home automation. Part 1 . Introduction

A project with simple requirements is beautiful . However simple requirements might turn into hard to achieve implementations . This is the case in this home automation project.
Requirement for this project is simple … automate everything
in the house
:

  • Lights
  • Shades
  • Music and video
  • Heating / ventilation
  • Air quality
  • Security

What exactly we are trying to achieve :

  • Control any device in the house remotely
  • Monitor and graph all sensors
  • Take action if events are happening in t
    he house
  • Have a secure, simple and  beautiful user interface so anyone can use
  • WIFI everything
  • Take action by using scenarios

So in this article series we will try to come up with a complete solution that will fulfill all requirements. And we will take it one device at a time

TFM IOT Home automation Part 2 – How smart a lamp can be ?

A simple lamp. How much intelligence can we add to a simple lamp  ? Well that depends …

What we can control?

  • We can power on and power off the lamp.

What we can measure?

  • Power consumption
  • Check if the light bulb needs to be replaced

On first iteration we will power on and power off.

The results:

To put things one step forward we need to be have all the controls from all the devices across the house in one single place ( a central hub for the house and be able to control it from anywhere )

 

Setup and run a standalone private docker registry v2

Introduction

This document will describe the process to setup / run an private docker registry v2. This come handy when you need to have a private image repository. Why you might need this ? Imagine that you need a fast local registry or if you feel uncomfortable pushing you private work to docker hub.

If you search the docker documentation they recommend to use it as a container. That will work in most of the cases. In our case we wanted to have it running on a standalone server, to store the data on a shared storage and several other reasons (speed is one of the reasons).

Installation

What we need is epel repo installed and we need to install docker-distribution

root@tfm-swrm01: yum search docker-distribution
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * epel: epel.check-update.co.uk
======================= N/S matched: docker-distribution =======================
docker-distribution.x86_64 : Docker toolset to pack, ship, store, and deliver
                           : content
  Name and summary matches only, use "search all" for everything.

at the time of writing this article the version available is 2.4.1:

[root@tfm-swrm01 registry]# yum info docker-distribution
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * epel: epel.check-update.co.uk
Installed Packages
Name        : docker-distribution
Arch        : x86_64
Version     : 2.4.1
Release     : 2.el7
Size        : 15 M
Repo        : installed
From repo   : extras
Summary     : Docker toolset to pack, ship, store, and deliver content
URL         : https://github.com/docker/distribution
License     : ASL 2.0
Description : Docker toolset to pack, ship, store, and deliver content

 

Installing it is pretty forward:

yum install -y docker-distribution

 

To enable docker registry to run at boot

systemctl enable docker-distribution.service

and to start it:

systemctl start docker-distribution.service

Configuration

Configuration is done via /etc/docker-distribution/registry/config.yml . We decided to start with a minimal configuration file and add additional setting later.  Below is a configuration file that works :

version: 0.1
log:
  fields:
    service: registry
storage:
    cache:
        layerinfo: inmemory
    filesystem:
        rootdirectory: /data/docker-registry
http:
    addr: :5000

Our shared storage is mounted in /data so keeping images in /data/docker-registry makes sense.

Remember that docker registry supports a lot of storage backend drivers (Local file system,Microsoft’s Azure Blob Storage,Google Cloud Storage, Amazon’s Simple Storage Service (S3) , Openstack Swift object storage, Aliyun OSS for object storage) but we will use local filesystem for now.

Docker has comprehensive documentation regarding parameters supported in config.yml, you can find it at Registry Configuration Reference and we recommend to check it in order to understand what are all the options you can configure.

Using it

1) Build a container and tag it to use the custom repository

docker build /tmp/grafana -t 192.168.1.1:5000/custom_grafana


2) Push the image to repository:

docker push 192.168.1.1:5000/custom_grafana

 

Create a maintainable Centos 7 box for web hosting

Goal: Create Centos 7 box for web hosting  ( LAMP stack / monitoring software code versioning software ) that will be easy to install , maintainable in time , easy to add functionality .

 

First things first: install the centos 7 minimal.

After instalation:

update OS

yum update
yum upgrade

generic tools

yum install perl perl-core ntpl nmap sudo libidn gmp libaio libstdc++ unzip sysstat sqlite net-tools mc bind-utils telnet

Remove iptables wrapper and install plain iptables service

yum remove firewalld

yum install iptables-services

Adding more useful software repositories

yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
yum install https://www.percona.com/redir/downloads/percona-release/redhat/latest/percona-release-0.1-3.noarch.rpm

Installing php 5.6

yum –enablerepo=remi-php56 install php php-gd php-mysql php-mcrypt

Installing mysql DB and backup tools

yum install Percona-Server-server-57 percona-xtrabackup

git

For Centos 7 we didn’t find (yet) a decent software repository for GIT 2.7 . Most probably we will make one and try to maintain it.  ( will be covered in another article )

Monitoring

yum install collectd collectd-apache

 

 

Installing Ricoh Aficio SG3100SNw in linux

So , you have decided to purchase a Ricoh Aficio SG3100SNw printer. Good. It’s a good choice for small / medium companies. What we like about it is that it comes with wireless interface and that is quite nice . Less cables more fun. I’m not going to get into details on how to unbox it and make the initial setup. I leave that as an exercise for the reader ( it’s not easy but up to a point it’s fun ) .   Continue reading Installing Ricoh Aficio SG3100SNw in linux