
// Metadata:
:description: IoT  Εισαγωγή στο SwarmLab
:keywords: iot, swarm
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:toc: right
:toc-title: Πίνακας περιεχομένων
:toclevels: 4
:source-highlighter: highlight
:icons: font
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Architecture overview

== Storage 

===  IPFS Cluster  image:emblem-web.png[link="https://cluster.ipfs.io/",window="_blank"]

Automated data availability and redundancy on https://cluster.ipfs.io/[IPFS^].

IPFS Cluster provides data orchestration across a swarm of IPFS daemons by allocating, replicating and tracking a global pinset distributed among multiple peers. 

It is being used for both tutors and students to publish content on a *decentralized* manner! +
Information will be *auto-deleted* after approximatelly *24 hours* of not being used. +


=== minio cluster  image:emblem-web.png[link="https://min.io/",window="_blank"]

High Performance, cloud Native Object Storage. +

https://docs.aws.amazon.com/AmazonS3/latest/API/API_Operations.html[Amazon’s S3 API^] is the defacto standard in the object storage world. +
MinIO is the defacto standard for S3 compatibility and was one of the first to adopt the API and the first to add support for S3 Select. +
More than 750 organizations, including Microsoft Azure, use MinIO’s S3 Gateway - more than the rest of the industry combined. +

It is being used for both tutors and students to save content on a *centralized* manner! +
Information storage is *permanent*. +

=== MariaDB Galera Cluster  image:emblem-web.png[link="https://mariadb.com/kb/en/what-is-mariadb-galera-cluster/",window="_blank"]

https://mariadb.org/[MariaDB^] Galera Cluster is a virtually synchronous multi-master cluster for MariaDB. + 
Provide *Active-active* multi-master topology. + 

Used for user/admin authorization and authentication.

=== A replica set in MongoDB image:emblem-web.png[link="https://docs.mongodb.com/manual/replication/#replication-in-mongodb",window="_blank"]

https://www.mongodb.com[MongoDB^] is a document database designed for ease of development and scaling. 

Used for labroom and swarmlab services administration and scheduling. +

=== ShareDB image:emblem-web.png[link="https://github.com/share/sharedb",window="_blank"]

ShareDB is a realtime database backend based on Operational Transformation (OT) of JSON documents

== Devel

=== slim  image:emblem-web.png[link="http://www.slimframework.com/",window="_blank"]
Slim is a https://www.php.net/[PHP^] micro framework that helps you quickly write powerful  APIs.

Used for main api of swarmlab.io +
Slim was used for a fast and powerful router that maps route callbacks to specific HTTP request methods and URIs. +

=== nodejs image:emblem-web.png[link="https://nodejs.org/en/",window="_blank"]
Nodejs is an asynchronous event-driven JavaScript runtime, Node.js is designed to build scalable network applications.

Used for event-driven programming and for Sockets and WebSockets.

=== vue.js  image:emblem-web.png[link="https://vuejs.org/",window="_blank"]

Vue is a progressive JavaScript framework for building user interfaces. +
It is designed from the ground up to be incrementally adoptable, and can easily scale between a library and a framework depending on different use cases. +
It consists of an approachable core library that focuses on the view layer only, and an ecosystem of supporting libraries that helps you tackle complexity in large Single-Page Applications. +
Used for the main user interface of swarmlab.io. +

=== python  image:emblem-web.png[link="https://www.python.org/",window="_blank"]

Python is an interpreted, high-level, general-purpose programming language. +
Python's design philosophy emphasizes code readability with its notable use of significant whitespace. +
Its language constructs and object-oriented approach aim to help programmers write clear, logical code for small and large-scale projects. +
Used along with ansible for maintenance and administration of the machines making up the cluster of swarmlab.io. +
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=== php image:emblem-web.png[link="https://www.php.net",window="_blank"]

PHP is a popular general-purpose scripting language that is especially suited to web development. +
Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world. +

Used with slim for creation of the main API.

=== codemirror image:emblem-web.png[link="https://codemirror.net/",window="_blank"]
CodeMirror is a versatile text editor implemented in JavaScript for the browser. +

Used for the online editors for interraction with tutors and students. +

=== oauth2 image:emblem-web.png[link="https://oauth.net/2/",window="_blank"]
OAuth 2.0 is the industry-standard protocol for authorization. +
OAuth 2.0 focuses on client developer simplicity while providing specific authorization flows for web applications, desktop applications, mobile phones, and living room devices. +
This specification and its extensions are being developed within the IETF OAuth Working Group. +

This protocol is being used for the connection of users and services. +

== System admin and devel

=== docker image:emblem-web.png[link="https://www.docker.com/",window="_blank"]

Docker provides the ability to package and run an application in a loosely isolated environment called a container. + 

Used for all the services implementations. +


=== docker-compose image:emblem-web.png[link="https://docs.docker.com/compose/",window="_blank"]

Compose is a tool for defining and running multi-container Docker applications. +
Used for development, configuration and testing of the services before deployment to the swarm. + 


=== Bash image:emblem-web.png[link="https://www.gnu.org/software/bash/",window="_blank"]

A lot of bash scripting was used (low-level) tasks concerning the Linux operating system.


=== ansible image:emblem-web.png[link="https://www.ansible.com/",window="_blank"]

Ansible is an open-source software provisioning, configuration management, and application-deployment tool. +

Used for administration of the machines of the general cluster of swarmlab.io as well as its subclusters. +

=== keycloak image:emblem-web.png[link="https://www.keycloak.org/",window="_blank"]

Open Source Identity and Access Management +

Used as backend for authentication to provide secure services in our sso implementation. +

== Deploy

=== Docker swarm  image:emblem-web.png[link="https://docs.docker.com/engine/swarm/",window="_blank"]

Docker swarm is a container orchestration tool, its allow  to manage multiple containers deployed across a cluster. + 

Used for orchestration of swarmlab.io  services. +



== Colaboration 

=== gittea image:emblem-web.png[link="https://gitea.com/",window="_blank"]

A self-hosted Git service used for the git-repo management used by students and tutors. +

=== jitsi image:emblem-web.png[link="https://jitsi.org/",window="_blank"]

A secure, flexible, and completely free video conferencing. +

Used for the online virtual meetings attended by students and tutors. +


== service access

=== noVNC image:emblem-web.png[link="https://novnc.com/info.html",window="_blank"]

A open source VNC client - it's is both a VNC client JavaScript library as well as an application built on top of that library. +
noVNC runs in any modern browser including mobile browsers (iOS and Android). +

Used to access a unix graphic environment for the services provided through a normal browser. + 


=== ttyd image:emblem-web.png[link="https://tsl0922.github.io/ttyd/",window="_blank"]

Terminal over the web. +

Used to access a unix command line for the services provided through a normal browser. + 


