Henrique Menezes henriquemenezes

Raspberry Pi InfluxDB: The solution for IoT Data storage

Raspberry Pi is costeffect linux computer very commonly used for IoT home automation projects.

Here are the 3 problems with conventional databases for IoT data store applications:

Too much or complex configuration
Unable to expire data / set retentional policies
Not tailor made of Time Series Data

Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

How To - Upload and add Images to markdown files in Gist

Markdown files allow embedding images in it. However it requires the image to be hosted at some location and we can add the url of the image to embed it.

Example: ![Alternate image text](https://someurl/imagelocation/image.png)

We can use services like imgur or other services to host the images and use the hosted URL.

Install MySQL on macOS Sierra

This procedure explains how to install MySQL using Homebrew on macOS Sierra 10.12

Install Homebrew

Installing Homebrew is effortless, open Terminal and enter :
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Note: Homebrew will download and install Command Line Tools for Xcode 8.0 as part of the installation process.

Install MySQL

At this time of writing, Homebrew has MySQL version 5.7.15 as default formulae in its main repository :

openssl

Install

Install the OpenSSL on Debian based systems

sudo apt-get install openssl

Job Control in ZSH and Bash

All processes in ZSH/Bash under job control are in 3 states: foregrounded, backgrounded and suspended.

# run command in the foreground
command
# run commend in the background

Resource type	Abbreviated alias
clusters (valid only for federation apiservers)
componentstatuses	cs
configmaps	cm
daemonsets	ds
deployments	deploy
endpoints	ep
events	ev
horizontalpodautoscalers	hpa

	require 'aws-sdk'
	require 'active_support'
	require 'active_support/core_ext'

	# http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Object.html#copy_to-instance_method
	COPY_TO_OPTIONS = [:multipart_copy, :content_length, :copy_source_client, :copy_source_region, :acl, :cache_control, :content_disposition, :content_encoding, :content_language, :content_type, :copy_source_if_match, :copy_source_if_modified_since, :copy_source_if_none_match, :copy_source_if_unmodified_since, :expires, :grant_full_control, :grant_read, :grant_read_acp, :grant_write_acp, :metadata, :metadata_directive, :tagging_directive, :server_side_encryption, :storage_class, :website_redirect_location, :sse_customer_algorithm, :sse_customer_key, :sse_customer_key_md5, :ssekms_key_id, :copy_source_sse_customer_algorithm, :copy_source_sse_customer_key, :copy_source_sse_customer_key_md5, :request_payer, :tagging, :use_accelerate_endpoint]

	Aws.config.update({
	region: 'us-east-1',
	credentials: Aws::Credentials.new(AWS_ACCESS_KEY, AWS_SECRET_KEY)

	# Virtual Tunnel Interface
	# 172.196.17.188 - 172.196.17.191
	set interfaces vti vti0 address 172.196.17.190/30
	set interfaces vti vti0 description 'Virtual tunnel interface for VPN tunnel'

	# Phase 2
	set vpn ipsec esp-group ESP-Default compression 'disable'
	set vpn ipsec esp-group ESP-Default lifetime '3600'
	set vpn ipsec esp-group ESP-Default mode 'tunnel'
	set vpn ipsec esp-group ESP-Default pfs 'dh-group16'

	### Generic Dockerfile demonstrating good practices


	### Imports

	# Bad-ish, we do not need Ubuntu for this, nor do we want latest if we are using in a build system, predictable is better
	FROM ubuntu:latest

	# Better, using a small image since our app has no dependency on Ubuntu
	FROM alpine:3.3