// Metadata:
:description: IoT Εισαγωγή στο SwarmLab
:keywords: iot, swarm
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:toc: right
:toc-title: Πίνακας περιεχομένων
:toclevels: 4
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**Architecture overview**
image:swarm-diagram.png[swarmlab,550,550]
== 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. +
