Java Colombo Meetup OpenShift Workshop

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OPENSHIFT Workshop PRESENTED BY Shekhar Gulati

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AGENDA Introductions Installation Usage Overview

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WHO AM I? • Shekhar Gulati • OpenShift Developer Evangelist • 8 years of software development experience • Learning JavaScript these days :) • Java / NoSQL/ Cloud • Loves to learn and try new technologies • Twitter Handle : shekhargulati • Github https://github.com/shekhargulati • Slides https://speakerdeck.com/shekhargulati

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WHO ARE YOU?

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In how many days/months/years JavaScript was written?

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WHAT WILL YOU LEARN? • What is PaaS • What is OpenShift • What is MongoDB • How to use OpenShift for deployment https://localjobs-t20.rhcloud.com/

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ASSUMPTIONS • You want to learn how to use OpenShift • You can write or read Java • You have your own laptop • You will ask questions

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There are no stupid questions only stupid answers. So ask questions ASK QUESTIONS

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OpenShift CLOUD OVERVIEW

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Cloud Computing http://www.katescomment.com/definition-of-cloud-computing-nist-g-cloud/

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“How do I use this?” Servers in the Cloud You must build and manage everything (OS, App Servers, DB, App, etc.) IaaS

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“I’m not sure this does what I need.” You are restricted to the features of the 3rd Party application Someone else’s app in the Cloud (CRM, etc.) SaaS

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• Quickly build the Application that YOU need for • Your Group, your Enterprise, your next great idea! • Big data, mobile, social • You code the application, We run it for you • Leverage the ease, scale and power of the Cloud Code Deploy Enjoy PaaS

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14 Cloud Service Models STORAGE (RHS) HARDWARE (x86, Power, S/390) VIRTUALIZATION (RHEV) OPERATING SYSTEM (RHEL) APPLICATION PLATFORM (JBOSS, PHP, RUBY, ETC) APPLICATION Automated and Managed by the Public or Private Cloud Offering Managed and Controlled by Customer (IT, Dev, or User) IaaS PaaS SaaS Increased Control Increased Automation

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EVERYONE GETS ALONG • Operations care about stability and performance • Developers just want environments without waiting OpenShift creates a peaceful environment for both parties

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16 15/03/13 Lowers Cost Improves Developer Efficiency Scales WHY CHOOSE PAAS

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OpenShift OPENSHIFT OVERVIEW

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18 OpenShift is PaaS by Red Hat Multi-language, Auto-Scaling, Self-service, Elastic, Cloud Application Platform

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19  A free auto-scaling, cloud-based application platform from Red Hat.  Multi Language, Multi Frameworks, Multi Cartridges.  No proprietary software.  No Lock-in.  Open source – OpenShift Origin. INTRODUCING OPENSHIFT

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origin Public Cloud Service On- premise or Private Cloud Software Open Source Project FLAVORS OF OPENSHIFT

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Developer IDE Integrations Web Browser Console Command Line Tooling REST APIs INTERACTIONS

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22 ● Strength. OpenShift is built on proven Red Hat technologies. ● Freedom. In OpenShift, work the way you want. ● Choice of Interface: Web Console, Command-line, or IDE ● Choice of Middleware: Java(EE6), Ruby, Node.js, PHP, Python, and Perl ● Choice of Cloud: Public, Private, or Hybrid Cloud ● Choice of Elasticity: Automatic application scaling when needed ● Openness. OpenShift’s open source software stack ensures application portability and No Lock-In. WHY OPENSHIFT

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23 WHAT's IN THE BOX

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24 OpenShift is the BEST PaaS for Java Developers

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25 ● Can run any thing that's Java – Java EE or Spring does not matter. ● Supports both Java 6 and Java 7 ● Supports JBoss AS7, JBoss EAP 6.0, Tomcat 6 , and Tomcat 7 ● Ability to write to persistent file system ● Debugging support ● Hot deployment ● Eclipse support WHY OPENSHIFT IS BEST JAVA PAAS

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26  OpenShift is free-as-in-beer & free-as-in-freedom  You get three free gears, each with 512MB memory and 1GB of disk space.  Need more resources, just ask!  The catch is we are in developer preview right now WHAT I GET

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27 Let's get our hands dirty

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28 https://openshift.redhat.com/app/account/new Promo code is COLOMBO CREATING OPENSHIFT ACCOUNT

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29 ➢ Login to OpenShift web console ➢ Click on “My Account” ➢ Namespace – colombomeetup – Unique per user CREATING NAMESPACE

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30 DEMO : WORDPRESS IN CLOUD

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31 Some terminology for today 1. Application – your web code and any data store. Has to be on 1 or more gears 2. Gear – is like a server. It can have only 1 language for the web programming. 3. Cartridge – it adds a language, a data store, or other functionality 4. Git – used for version control and managing code between server and your development machine 5. Ssh – command line tool to connect to your gear

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WORKFLOW RHEL RHEL Brokers Node Node Web Console Eclipse IDE Cmd Line OpenShift Gear

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CARTRIDGES RHEL RHEL Brokers Node Node Web Console Eclipse IDE Cmd Line JBOSS MYSQL

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CARTRIDGES CUSTOM Etc. Etc. Ruby Python PHP Java Postgres MySQL OpenShift Default Cartridges

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RHEL RHEL Developer pushes application code via GIT source code management system Git Protocol / ssh Broker Node Node Node RHEL Push JBoss Code Git Repo MySQL WORKFLOW

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36 Install Ruby 1.8.7 or greater Install Git Install rhc OpenShift gem Refer to documentation INSTALLING CLIENT TOOLS

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37 rhc setup -l -> creates namespace -> upload ssh keys SETUP OPENSHIFT ENVIRONMENT

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38 Let's see it in action

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39 BUILDING APPLICATION

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40  MongoDB 2.2  OpenShift  Java 7 – Spring Framework – Spring MongoDB  GIT  SSH TECHNOLOGY CHOICES

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41  Open Source NoSQL document datastore  Active community  Rich documents  Easy to get running  Geospatial indexing  Writes are very fast. You can customize it using WriteConcern WHAT IS MONGODB

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42 RICH DOCUMENTS

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43  What is it for?  Find all the MongoDB jobs near me – Proximity Queries  Find all the MongoDB jobs within Colombo – Bounded Queries  Find all the MongoDB job at this location – Exact Queries ● Supports only two dimensional indexes.  You can only have one geospatial index per collection.  By default, 2d geospatial indexes assume longitude and latitude have boundaries of -180 inclusive and 180 non-inclusive (i.e. [-180, 180)) GEOSPATIAL INDEXING BASICS

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44 1) Put your coordinates into an array { loc : [ 50 , 30 ] } //SUGGESTED OPTION { loc : { x : 50 , y : 30 } } { loc : { foo : 50 , y : 30 } } 1) { loc : { lon : 40.739037, lat: 73.992964 } } 2) Make a 2d index db.places.ensureIndex( { loc : "2d" } ) 3) If you use latitude and longitude as your coordinate system, always store longitude first. MongoDB’s 2d spherical index operators only recognize [ longitude, latitude] ordering. HOW TO MAKE IT WORK

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45 ● When you create the index, MongoDB converts location data to binary geohash values and calculates these values using the location data and the index’s location range ● Geohashes have a precision that is determined by the number of bits in the hash. Default value 26 ● More bits allow the index to provide results with greater precision ● You can configure number of bits at index creation db.collection.ensureIndex( {: "2d"} , { bits: } ) GEOHASHES

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46 ● MongoDB supports compound geospatial indexes. ● the field with location data is the first field db.jobs.ensureIndex( { location: "2d", skills: 1 } ) COMPOUND GEOSPATIAL INDEXES

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47 Distributed Version control A local repository – on your laptop A remote repository – on some other machine, usually a server LET's LOOK AT GIT

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48 1. Git add . (means add all new files as being tracked in the local repository) 2. Git commit –am “your message” (means commit all my changes to the local repository with this message) 3. Git push (means push from your local repository to the repository on your OpenShift gear) 3 COMMANDS YOU SHOULD KNOW

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49 $ rhc app create localjobs jbosseap mongodb-2.2 –from- code=git://github.com/shekhargulati/localjobs.git $ rhc app show -a localjobs $ scp jobs-data.json :app-root/data $ rhc app ssh -a localjobs $ cd app-root/data $ mongoimport -d localjobs -c jobs --file jobs-data.json -u $OPENSHIFT_MONGODB_DB_USERNAME -p $OPENSHIFT_MONGODB_DB_PASSWORD -h $OPENSHIFT_MONGODB_DB_HOST -port $OPENSHIFT_MONGODB_DB_PORT Instructions at https://github.com/shekhargulati/localjobs/blob/master/README.md DEMO : LOCALJOBS APP