Exploring GitHub DockerHub and OCCS Part 3

In my previous post I described how I created a stack definition including my Node.js web application and a MongoDB service using docker-compose. In this article I will describe the steps I took to link my GitHub and Docker Hub accounts in order to automatically build a docker image triggered by a git push command.

Trigger a Build of the MedRec API Docker Image on Docker Hub

Combining internet / cloud based services such as GitHub and Docker Hub allows developers to experience productivity gains without having to fund a local server to provide this capability. I wanted to explore and experience this for myself.

Link Docker Hub and Git Hub accounts

As I didn’t have a docker account for my user I pointed my browser to docker hub … https://hub.docker.com/ and clicked the SignUp option. Continue reading “Exploring GitHub DockerHub and OCCS Part 3”

Exploring GitHub Docker Hub and OCCS Part 1

In my previous post in this series I provided an Introduction describing the high level steps I planned to take.
In this post I will walk through the detailed steps to Dockerise the MedRec application.

Dockerise the MedRec APIs

Git clone the project repository

I used my Windows Surface Pro-4 with Oracle VM Virtual Box installed to host my development VM. I managed to source a VBox image that already had Ubuntu 16.04 and Docker installed so that helped get me started. In my development environment on my laptop, I created a directory under my home directory named gitprojects.
I cd into that directory.

cd gitprojects
Continue reading “Exploring GitHub Docker Hub and OCCS Part 1”

Exploring GitHub, DockerHub and OCCS – Introduction

As part of our MedRec API playpen initiative we had already developed some REST API’s using Node.js and leveraged MongoDB running on Oracle IaaS as the persistence layer. . This post describes what I did to dockerise the MedRec API application and eventually run it on the Oracle Container Cloud Service (OCCS).

The APIs have already been made available for interested parties to interact with via SwaggerUI. Of course developers could develop their own code (or any REST client) to interact with them. As a team we used a combination of the Oracle Developer Cloud Service (Git repository, Issue Tracker, Build Server etc) and also the public GitHub to provide public access to our project code. As the source code for the Node.js project containing the API’s was pushed to GitHub I simply did a clone of the Node application code in order to download and run it locally (MedRec API tutorials available here).

The application ran well enough on my local laptop which running Ubuntu 16.04, however I really wanted to be able to try to run the app and MongoDB as a Docker image/stack on my laptop. After I had the application successfully “Dockerised”, then I planned to deploy my application stack to the Oracle Container Cloud Service. I also wanted to explore the use of the GitHub / Docker Hub integration to build my image on Docker Hub, and then from within the Oracle Container Cloud Service (OCCS). With the application image available on Docker Hub, I could then pull my image from that source in order to run it up on OCCS.

A good blog can really help bring you up to speed quickly and help overcome inertia to get you started and I would like to acknowledge the help that Mauricio Payetta’s blog provided me.

In this series of blog posts I plan to retrace what I did during my self-learning. Continue reading “Exploring GitHub, DockerHub and OCCS – Introduction”

Teaching How to simplify building NodeJS APIs with Loopback Framework

In this blog, I am going to show you how to get started with the Loopback framework to easily auto-build REST APIs in NodeJS and persistence layer in a variety of options, including relational and non-relational databases e.g. In-memory DB, MongoDB, MySQL, Cassandra, Oracle, etc.

In terms of API design and development, Loopback allows you to work “top-down” or “bottom-up”. I am going to cover both approaches in this blog.

First, we are going to create an API model definition in place, as we are building the REST APIs, this exercise will give us a Swagger-based API definition. Alternatively, we are going to start from an existing Swagger definition and use it to implement NodeJS REST APIs pointing to a persistence layer of choice (in-memory DB, MongoDB, MySQL, DB2, Oracle, etc.). I personally prefer the “API First/Top Down” approach, as it gives me the option to properly design and test my APIs first and then, simply move to implementation phase, but this ultimately depends on situations, preferences and requirements.

Continue reading “Teaching How to simplify building NodeJS APIs with Loopback Framework”

Teaching How to use Nginx to frontend your backend services with Trusted CA certificates on HTTPS

Now days with the adoption of Serverless architectures, microservices are becoming a great way to breakdown problem into smaller pieces. One situation that is common to find, is multiple backend services running on technologies like NodeJS, Python, Go, etc. that need to be accessible via HTTPS. It is possible to enable these internal microservices directly with SSL over HTTPS, but a cleaner approach is to use a reverse proxy that front ends these microservices and provides a single HTTPS access channel, allowing a simple internal routing.

In this blog, I am showing how simple it is to create this front end with Nginx and leveraging “Let’s encrypt” to generate trusted certificates attached to it, with strong security policies, so that our website can score an A+ on cryptographic SSL tests conducted by third party organizations.

Continue reading “Teaching How to use Nginx to frontend your backend services with Trusted CA certificates on HTTPS”

Teaching How to Use Alexa to Take Off your Drone using NodeJS

Recently I was in Auckland, New Zealand running an Integration in Action workshop and I used Alexa to trigger some of my APIs, including some NodeJS APIs that I built to take off a drone. Some people found this interesting and asked me to write this blog to explain in detail how it works… So, here it is, I hope you find it useful.

There are multiple ways in which you can make Alexa to call your own APIs. Perhaps the most versatile way is by adding a new skill (see: blog 1, 2). However I found an even easier way to do so, and in order to achieve the MVP approach I have been attempting to practice in my day-to-day life, I took this simpler option, which is simulating a Phillips Hue HA bridge. By doing  so, Alexa detects a new Home Automation (HA) device in “her” network range and accepts voice commands to easily “turn it on” or “turn it off” which you can then leverage to call your own APIs.

Continue reading “Teaching How to Use Alexa to Take Off your Drone using NodeJS”

Teaching how to integrate Salesforce and Sales Cloud with Oracle Integration Cloud Service

In this blog, I am going to show you how to integrate Salesforce and Sales Cloud with Oracle Integration Cloud Service (ICS). I am going to cover in detail how to configure ICS to subscribe for events to Salesforce and synchronise both SaaS applications without having to poll any of the endpoints. Salesforce is going to notify ICS when a specific event occurs, such as when Contacts who belong to a specific Account are added or edited.

This blog is a sequel of a previous blog, where I explain how to integrate Sales Cloud using ICS. If you haven’t reviewed it yet, I invite you to do so. Here is the link

Since this guide extends the Sales Cloud integration blog, I assume that you have created a simple CRUD set of REST APIs that interact with Sales Cloud Contacts. We will simply reuse these REST APIs to integrate into Sales Cloud. However, instead of the REST enabled API to CRUD Contacts into Sales Cloud, we could have decided to use an ICS “Invoke-based” Sales Cloud connector and achieve the same.

Continue reading “Teaching how to integrate Salesforce and Sales Cloud with Oracle Integration Cloud Service”