Introduction to migration to cloud

Transcription

1 Project acronym: Project name: Project code: NEBULA A novel vocational training programme on cloud computing skills LLP GR-LEONARDO-LMP Document Information Document ID name: Nebula_WP4_D4.3.1_Learning_Material_and_Content_2015_30_04 Document title: Nebula VET program learning material and content Type: Slides Date of Delivery: 30/04/2015 Work package: WP4 Activity D Dissemination level: Public Document History Versions Date Changes Type of change Delivered by Version /04/2015 Initial Document - UCBL and INSA of Lyon Version /06/2015 Edition Modifications according to feedback provided by partners UCBL and INSA of Lyon Version /09/2015 Edition Insertion of license type UCBL and INSA of Lyon Acknowledgement The persons of UCBL in charge of producing the course are Parisa Ghodous, Catarina Ferreira Da Silva, Jean Patrick Gelas and Mahmoud Barhamgi. The persons from UCBL involved in preparing, translation and review are Hind Benfenatki, Gavin Kemp and Olivier Georgeon. The persons of INSA of Lyon in charge of producing the course are Frédérique Biennier, Nabila Benharkat. The person from INSA of Lyon involved in preparing, translation and review is Youakim Badr. Disclaimer The information in this document is subject to change without notice. All rights reserved. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use, which may be made of the information contained therein.

2 Introduction to migration to cloud Objectives Define the fundamental concepts that are associated to cloud computing and migration to the cloud, identifying the most relevant opportunities and general benefits Note: due to intellectual property reasons, the logotype of UCBL must remain in all utilisation of this course content, as well as the note copyright DUNOD mentioned in some slides with figures.

3 Introduction to migration to cloud PART 4: Platforms for cloud computing

4 PART 4 OVERVIEW 1. PaaS 2. Migration

5 What does PaaS mean? PaaS means Platform as a Service or platform of cloud computing This term means an execution platform hosted by an operator and accessed by Internet Amazon Web Services (AWS) is the first platform of cloud computing PaaS approach, not only provides a deported execution environment but also a set of infrastructure's services

6 PaaS Characteristics (1/2) Allows a cloud user to deploy consumer-created or acquired applications using programming languages and tools supported by the service provider Provides specific programming languages support, APIs, development environments, database instances, computation instances, application server instances Not particularly useful when: Proprietary programming languages are used The hardware and software must be customized, for instance to improve the performance of the application

7 PaaS Characteristics (2/2) The user (i.e. the developer): Has control over the deployed applications and, possibly, application hosting environment configurations Does not manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage

8 Copyright DUNOD Multiple PaaS types PaaS platforms propose: Data persistence service Application hosting service Integration service Monitoring service Users Integration IntegrationApplication Execution Application Execution Data Persistence Data Persistence

9 PaaS Specificities Virtualization CAP Theorem (Consistency, Availability and Partition Tolerance): it is possible for a web distributed computer system to simultaneously satisfy only two of the three following guarantees: Consistency: a processing keeps all of the data in a coherent state Availability: capacity of system to offer a constant service quality to users Partition-tolerance: capacity of the system to function even one of the component fails

10 PaaS components Data center Persistence level Execution level on virtual machine or runtime Integration level: API or Integration Bus Composition level in form of company s services mashup

11 Some considerations on migration to PaaS providers Independence between IT on-premises infrastructure and PaaS offerings Redesign the software architecture Adopt a service-oriented architecture Need of experienced software architects to understand how best to integrate both onpremises and the selected PaaS offerings information systems

12 Major PaaS players Amazon Web Services Examples: Elastic MapReduce (EMR) and S3 storage Google App Engine AppScale offers an open-source cloud computing platform for Google App Engine applications Microsoft Azure Environment for execution of applications and persistent storage AppFabric connects users and on-premises applications to cloud-hosted applications

13 Other Powerful PaaS Providers Web application development and deployment Engine Yard uses the languages Ruby on Rails, PHP and the runtime environment Node.js Cloud Foundry uses Java, Ruby, Python, Go, PHP or Node.js Virtual servers where customers can install their own operating systems FlexiScale (was the first European Cloud Platform)

14 Other Powerful PaaS Providers Process data & apps in real time Gigaspaces XAP (extreme Application Platform) application server using in-memory data grid caching Force.com s AppExchange and Heruko platform Appistry's CloudIQ RedHat s OpenShift open source

15 Copyright DUNOD Lifecycle of application development on PaaS platform

16 When to develop on PaaS platform? Today, we consider the development on PaaS platform is justified only if the qualities of this platform bring more benefits for company, such as: High availability offered by platform Security on data integrity Capacity of absorption of seasonal surcharge Capacity to store large amounts of data

17 Summary of current part PaaS definition, caracteristics, componentes Major PaaS players Considerations on migration to PaaS providers Lifecycle of application development on PaaS platform