Welcome!

Open Source Cloud Authors: Mehdi Daoudi, Liz McMillan, Xenia von Wedel, Stackify Blog, Vaibhaw Pandey

Related Topics: @CloudExpo, Open Source Cloud

@CloudExpo: Blog Post

Hadoop Quickstart: Create and Better Manage Hadoop Clusters on Rackspace

Use Whirr to automate standup of your distributed cluster on Rackspace

We have previously provided a Quickstart guide to standing up Rackspace cloud servers (and have one for Amazon servers as well). These are very low cost ways of building reliable, production ready capabilities for enterprise use (commercial and government).  And Bryan Halfpap has provided a Quickstart guide which shows you how to build a Hadoop Cluster (leveraging Cloudera’s CDH3).  Using Bryan’s guide you can have a Hadoop Cluster up and running in under 20 minutes.

With this post we would like to provide you with some additional tips that flow from these other posts. We will show you how to build clusters even faster using another common tool in community use, Whirr.

What is Whirr? Apache Whirr is a set of libraries for running cloud services. Here is more from http://whirr.apache.org/

Whirr provides:

  • A cloud-neutral way to run services. You don’t have to worry about the idiosyncrasies of each provider.
  • A common service API. The details of provisioning are particular to the service.
  • Smart defaults for services. You can get a properly configured system running quickly, while still being able to override settings as needed.

And the great news is you can use Whirr as a command line tool for deploying clusters.

If you follow the tips below you can use Whirr to quickly standup distributed clusters. Our assumptions in this guide are that you have stood up RedHat severs using our Rackspace tutorial. But if this is not the case you should be able to easily modify the tips below to suit your situation.

SSH into your Rackspace account by terminal window:

sudo ssh [email protected]

After logging in, it is always a good idea to make sure you have the latest packages. In Red Hat, type:

sudo yum upgrade

Now it is time to install Whirr.  This is easy since you are running RedHat. RedHat uses YUM, a package management application that makes software installation easy. Type:

yum install whirr

Your installation will be complete in under a minute.

You will now need to generate a keypair for use with Whirr. This will let you enable secure communications with the Whirr cluster without needing passwords. To do that, enter the following command:

ssh-keygen -t rsa -P ”

You will see:

Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):

Just hit “enter”.

You will see something like:

Created directory ‘/root/.ssh’.
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
c6:31:f7:f5:97:e4:8c:b3:2a:f4:0d:a0:93:e4:c1:06 [email protected]
The key’s randomart image is:
+–[ RSA 2048]—-+
| |
| E |
| o o . .. |
| * = . .=..|
| + S . .o +o|
| * . . o .|
| o . o. |
| . … |
| .. |
+—————–+

Now you must define your Whirr cluster. you do that by creating a properties file. For simplicity, you will name it hadoop.properties. You will need your rackspace username and API to fill out the whirr properties file.  Your API is found in my account page under “API Access”

You can create the properties file many ways. Here is how to do it in nano:

nano hadoop.properties

Now  enter the following info in that file, subsituting your login and API info for what you see below:

whirr.cluster-name=myhadoopcluster
whirr.instance-templates=1 hadoop-jobtracker+hadoop-namenode,1 hadoop-datanode+$
whirr.provider=cloudservers-us
whirr.identity=enteryourloginidfromrackspace
whirr.credential=[youuseyourownapi]
whirr.private-key-file=/root/.ssh/id_rsa
whirr.public-key-file=/root/.ssh/id_rsa.pub
whirr.cluster-user=newusers
whirr.hadoop-install-function=install_cdh_hadoop
whirr.hadoop-configure-function=configure_cdh_hadoop

Now to launch a cluster, type:

$ whirr launch-cluster –config hadoop.properties

This will take a few moments to run. As it runs you should see messages like:

Bootstrapping cluster
Configuring template
Starting 1 node(s) with roles [hadoop-datanode]
Configuring template
Starting 1 node(s) with roles [hadoop-jobtracker, hadoop-namenode]

As things are started up, servers are being automatically built. Keep watching your e-mail, you will be getting notices of server standup. Remember, this is costing you money. When you finish using your clusters you will want to terminate them. You can do that through Whirr or by just nuking the servers using your Rackspace account and control panel.

Note the info being provided in the terminal window. Information is being provided on the instances being stood up.  As you skim this info you will notice a couple URL’s are provided that give you a web UI into the namenode and job tracker. For example, mine are:

Namenode web UI available at http://50.56.211.206:50070

Jobtracker web UI available at http://50.56.211.206:50030

You will also see that a site file was created for you at:

/root/.whirr/myhadoopcluster/hadoop-site.xml

You need to update your your local Hadoop configuration to use this file.  Type the following commands:

cp -r /etc/hadoop-0.20/conf.empty /etc/hadoop-0.20/conf.whirr
rm -f /etc/hadoop-0.20/conf.whirr/*-site.xml
cp ~/.whirr/myhadoopcluster/hadoop-site.xml /etc/hadoop-0.20/conf.whirr
alternatives –install /etc/hadoop-0.20/conf hadoop-0.20-conf /etc/hadoop-0.20/conf.whirr 50
alternatives –display hadoop-0.20-conf

A proxy script was created for you at:

/root/.whirr/myhadoopcluster/hadoop-proxy.sh

You should now start that proxy.  It is there for security reasons.  All traffic from the network where your client is running is proxied through the master node of the cluster using an SSH tunnel.  This script launches the proxy.  Run the following command to launch the script:

~/.whirr/myhadoopcluster/hadoop-proxy.sh

If that doesn’t run make sure you have the right permissions on the file by

chmod +rwx hadoop-proxy.sh

Then try again.

With the above you are now able to use your Hadoop Cluster.

Prove that by browsing HDFS:

hadoop fs -ls /

Now it is time to run a MapReduce job!  We are going to use one of the example programs provided in the Hadoop installation. The program is in the file Hadoop-*examples*.jar  First, a lets review list of options available form the program. See these by entering:

hadoop jar $HADOOP_HOME/hadoop-examples-*.jar

You will see:

An example program must be given as the first argument.
Valid program names are:
aggregatewordcount: An Aggregate based map/reduce program that counts the words in the input files.
aggregatewordhist: An Aggregate based map/reduce program that computes the histogram of the words in the input files.
dbcount: An example job that count the pageview counts from a database.
grep: A map/reduce program that counts the matches of a regex in the input.
join: A job that effects a join over sorted, equally partitioned datasets
multifilewc: A job that counts words from several files.
pentomino: A map/reduce tile laying program to find solutions to pentomino problems.
pi: A map/reduce program that estimates Pi using monte-carlo method.
randomtextwriter: A map/reduce program that writes 10GB of random textual data per node.
randomwriter: A map/reduce program that writes 10GB of random data per node.
secondarysort: An example defining a secondary sort to the reduce.
sleep: A job that sleeps at each map and reduce task.
sort: A map/reduce program that sorts the data written by the random writer.
sudoku: A sudoku solver.
teragen: Generate data for the terasort
terasort: Run the terasort
teravalidate: Checking results of terasort
wordcount: A map/reduce program that counts the words in the input files.

So lets put this info to use. We will make a directory put some info in there, and run the wordcount program:

 

$ export HADOOP_HOME=/usr/lib/hadoop
$ hadoop fs -mkdir input
$ hadoop fs -put $HADOOP_HOME/CHANGES.txt input
$ hadoop jar $HADOOP_HOME/hadoop-examples-*.jar wordcount input output
$ hadoop fs -cat output/part-* | head

Now you are off and running.

You now have a platform capable of scaling to very large jobs. And it runs CDH3, the most reliable, capable distribution of Hadoop and related technologies. Let the fun begin!

But one final note. Think about the lifecycle of your system. At some time you will need to spin it down and turn it off.  To destroy the cluster gracefully using Whirr, enter this command:

whirr destroy-cluster –config hadoop.properties

Using the information above you can create and better manage Hadoop Clusters on Rackspace very easily. This is how we create our CDH Clusters.  In future posts we will show you how to get data prepared for analysis and how to run some queries.  We will also provide tips on how to use Cloudera’s free management tools and how to upgrade to Cloudera Enterprise when you are ready.

 

Read the original blog entry...

More Stories By Bob Gourley

Bob Gourley writes on enterprise IT. He is a founder and partner at Cognitio Corp and publsher of CTOvision.com

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@ThingsExpo Stories
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.
It is of utmost importance for the future success of WebRTC to ensure that interoperability is operational between web browsers and any WebRTC-compliant client. To be guaranteed as operational and effective, interoperability must be tested extensively by establishing WebRTC data and media connections between different web browsers running on different devices and operating systems. In his session at WebRTC Summit at @ThingsExpo, Dr. Alex Gouaillard, CEO and Founder of CoSMo Software, presented ...
WebRTC is great technology to build your own communication tools. It will be even more exciting experience it with advanced devices, such as a 360 Camera, 360 microphone, and a depth sensor camera. In his session at @ThingsExpo, Masashi Ganeko, a manager at INFOCOM Corporation, introduced two experimental projects from his team and what they learned from them. "Shotoku Tamago" uses the robot audition software HARK to track speakers in 360 video of a remote party. "Virtual Teleport" uses a multip...
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, whic...
SYS-CON Events announced today that Evatronix will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Evatronix SA offers comprehensive solutions in the design and implementation of electronic systems, in CAD / CAM deployment, and also is a designer and manufacturer of advanced 3D scanners for professional applications.
Leading companies, from the Global Fortune 500 to the smallest companies, are adopting hybrid cloud as the path to business advantage. Hybrid cloud depends on cloud services and on-premises infrastructure working in unison. Successful implementations require new levels of data mobility, enabled by an automated and seamless flow across on-premises and cloud resources. In his general session at 21st Cloud Expo, Greg Tevis, an IBM Storage Software Technical Strategist and Customer Solution Architec...
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
An increasing number of companies are creating products that combine data with analytical capabilities. Running interactive queries on Big Data requires complex architectures to store and query data effectively, typically involving data streams, an choosing efficient file format/database and multiple independent systems that are tied together through custom-engineered pipelines. In his session at @BigDataExpo at @ThingsExpo, Tomer Levi, a senior software engineer at Intel’s Advanced Analytics gr...