Difference between revisions of "Hadoop Tutorial 4: Start an EC2 Instance"

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<br />
 
<br />
 
<br />
 
<br />
 +
 +
=References=
 +
 +
* A good description for reserving and connecting an AMI from the terminal window using the ec2-tools can be found here: [http://docs.amazonwebservices.com/AWSEC2/2008-08-08/GettingStartedGuide/index.html?running-an-instance.html#authorizing-access-to-an-instance docs.amazonwebservices.com].
 +
* Alternatively, you can also try this page: [http://paulstamatiou.com/how-to-getting-started-with-amazon-ec2 paulstamatiou.com].
  
 
=Method #1: Using the AWS Console=
 
=Method #1: Using the AWS Console=
Line 17: Line 22:
 
The steps are fairly simple:
 
The steps are fairly simple:
  
−
* Connect to the AWS console, and then select Amazon EC2
+
===Launch instance from AWS console===
−
* Click on '''Launch Instance'''
+
* Connect to the AWS console (see [[Hadoop Tutorial 3 -- Hadoop on Amazon AWS | Tutorial 3]] for a reminder), and then select Amazon EC2.
 +
* In the QuickStart tab, pick "Fedora LAMP Server", as a machine to instantiate.
 +
* Select 1 instance, pick the architecture of your choice, and '''No Preference''' for the zone. 
 +
* Select '''Launch Instance''' (''Spot Instances'' are low-rate machines that run only when the demand is low, and the user pays less).
 +
* Click on '''Continue''' (make sure your browser window is large enough to see the bottom part of the pop-up!)
 +
<br />
 +
<center>[[Image:AWS_StartNewEC2Instance.png | 500px]]</center>
 +
<br />
 +
* Use defaults for '''Kernel Id''' and '''RamDisk Id'''.
 +
* '''No Monitoring'''
 +
* Click on '''Continue'''
 +
<br />
 +
<center>[[Image:AWS_CreateKeyPairForEC2.png | 500px]]</center>
 +
<br />
 +
* Pick a name for your key-pair file (e.g. ''dftKeyPair''), then click on '''Create New Key Pair'''.
 +
* When prompted, '''save''' the key-pair file (''dftKeyPair.pem'') to a local directory on your computer (Desktop, for example).
 +
* Follow the directions to create a security group (I called it ''dftGroup'' for simplicity).
 +
<br />
 +
<center>[[Image:AWS_SecurityGroupForEC2.png | 500px]]</center>
 +
<br />
 +
* '''Review!'''
 +
<center>[[Image:AWS_ReviewEC2Instance.png | 500px]]</center>
 +
<br />
 +
 
 +
* '''Launch!'''
 +
* '''Watch''' as the instance is created, and loads up...
 +
<br />
 +
<center>[[Image:AWS_watchingInstanceLaunch.png|500px]]</center>
 +
<br />
 +
 
 
* When the instance is created, right click on it and click on '''Connect'''
 
* When the instance is created, right click on it and click on '''Connect'''
 
<center>
 
<center>
 
[[Image:ConnectToInstanceOnEC2.png | 300px]]
 
[[Image:ConnectToInstanceOnEC2.png | 300px]]
 
</center>
 
</center>
 +
 +
===Connecting using SSH===
 +
* First create a working directory '''on your local computer''' (I'll assume you are using a Mac or a Linux box.  Similar steps are easy to take for Windows)
 +
* Start a Terminal window
 +
* create a new working directory and copy the Key-Pair file into it:
 +
 
 +
  '''cd /'''
 +
  '''mkdir aws'''
 +
  '''cd aws'''
 +
  '''cp  ~/Desktop/dftKeyPair.pem .'''
 +
  '''chmod go-r dftKeyPair.pem'''
 +
  '''ls -l '''
 +
  total 8
 +
  -rw-------@ 1 thiebaut  wheel  1693 Apr 22 08:25 dftKeyPair.pem
  
 
* Copy/Paste the ssh command into a shell that you will have started
 
* Copy/Paste the ssh command into a shell that you will have started
  
−
   ssh -i dft.pem root@ec2-174-129-165-180.compute-1.amazonaws.com
+
   ssh -i dftKeyPair.pem root@ec2-75-101-234-143.compute-1.amazonaws.com  
 +
 
 +
* You should be connected!
 +
 +
  '''ssh -i dftKeyPair.pem root@ec2-75-101-234-143.compute-1.amazonaws.com'''
 +
  The authenticity of host 'ec2-75-101-234-143.compute-1.amazonaws.com...
 +
  RSA key fingerprint is cd:79:eb:e5:e9:2e:d6:a2:9c:...
 +
  Are you sure you want to continue connecting (yes/no)? '''yes'''
 +
  Warning: Permanently added 'ec2-75-101-234-143.compute-1.amazonaws.com,7...
 +
 +
 +
        __|  __|_  )  Fedora 8
 +
        _|  (    /    32-bit
 +
        ___|\___|___|
 +
 +
  Welcome to an EC2 Public Image
 +
                        :-)
 +
 +
    Base
 +
 +
--[ see /etc/ec2/release-notes ]--
 +
 +
  [root@ip-10-244-181-219 ~]#
  
−
* Make sure you have downloaded a private key file to your .ssh directory first.  This is done by
+
* You are now '''root''' of a machine on Amazon's cloud.  Play with it!
−
** Selecting your account
+
* Check that the mysql server is working:
−
** clicking on Credentials
+
 
−
** selecting the X.509 certificate tab
+
  [root@ip-10-244-181-219 ~]# '''mysql'''
−
** and clicking on '''Create New'''. A page will open allowing you to download your pem files.  One will be the private key, of the form pk-WMxxxxxxxxxx.pem, the other the certicifcate, of the form cert-WMxxxxxxxxxx.pem.  Both should be put in your .ssh dirctory.
+
  Welcome to the MySQL monitor.  Commands end with ; or \g.
 +
  Your MySQL connection id is 2
 +
  Server version: 5.0.45 Source distribution
 +
 +
  Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
 +
   
 +
  mysql> '''show databases;'''
 +
  +--------------------+
 +
  | Database          |
 +
  +--------------------+
 +
  | information_schema |
 +
  | mysql              |
 +
  | test              |
 +
  +--------------------+
 +
  3 rows in set (0.00 sec)
 +
 
 +
  mysql> '''quit'''
 +
 
 +
* Add a new user
 +
 
 +
  [root@ip-10-244-181-219 ~]# '''adduser thiebaut'''
 +
  [root@ip-10-244-181-219 ~]# '''ls /home'''
 +
  thiebaut  webuser
 +
  [root@ip-10-244-181-219 ~]#
 +
 
 +
===Installing Software===
 +
 
 +
* Try editing a file with emacs...
 +
* Oops, emacs is not installed on the EC2 Instance.  No big deal, we can install it.  The installation package under Fedora is called '''yum''':
 +
 
 +
    yum -y install emacs
 +
 
 +
* Now try editing with emacs...  :-)
 +
 
 +
 
 +
 
 +
<br />
 +
<greenbox>
 +
[[Image:ComputerLogo.png|right |100px]]
 +
;Lab Experiment #1:
 +
: Run the multiprocessing version of the NQueens program on your new Instance and compare its execution time to the best time obtained so far.
 +
 
 +
: The multiprocessing version of the N-Queens program is available [[CSC352_multiprocessingNQueens.py | here]].  An easy way to time the execution of multiple runs would be:
 +
 
 +
::<tt>for i in {15..21} ; do echo -n $i<br />    /usr/bin/time python2.6 multiprocessingNQueens.py $i 2>&1 | grep real<br />      done</tt>
 +
 
 +
: You will discover that the multiprocessing python module runs only with Python 2.6!  So you'll have to install it before running the program.  The steps are simple:
 +
:* install gcc first 
 +
:* download the source code for Python2.6
 +
:* untar it into a directory
 +
:* compile it
 +
:* install it
 +
 
 +
: These steps are shown below
 +
 
 +
::<tt>    yum -y install gcc </tt>
 +
::<tt>    wget http://www.python.org/ftp/python/2.6.5/Python-2.6.5.tgz</tt>
 +
::<tt>    tar -xzvf Python-2.6.5.tgz</tt>
 +
::<tt>    cd Python-2.6.5</tt>
 +
::<tt>    ./configure</tt>
 +
::<tt>    make</tt>
 +
::<tt>    make install</tt>
 +
   
 +
: You should have python 2.6 available to you.  To invoke it, simply use '''python2.6''' at the command line.
 +
</greenbox>
 +
<br />
  
 
=Method #2: Using the EC2 Tools=
 
=Method #2: Using the EC2 Tools=
Line 69: Line 204:
 
<br />
 
<br />
 
<br />
 
<br />
−
<br />
 
−
<greenbox>
 
−
[[Image:ComputerLogo.png|right |100px]]
 
−
;Lab Experiment #1:
 
−
: Run the multiprocessing version of the NQueens program on your new Instance and compare its execution time to the best time obtained so far.
 
−
 
−
: The multiprocessing version of the N-Queens program is available [[CSC352_multiprocessingNQueens.py | here]].  An easy way to time the execution of multiple runs would be:
 
  
−
::<tt>for i in {15..21} ; do echo -n $i<br />    /usr/bin/time python2.6 multiprocessingNQueens.py $i 2>&1 | grep real<br />      done</tt>
 
−
 
−
</greenbox>
 
−
<br />
 
 
<br />
 
<br />
 
<br />
 
<br />

Latest revision as of 15:24, 22 July 2011

--D. Thiebaut 16:01, 18 April 2010 (UTC)

Creating an EC2 Instance refers to the action of starting a server on Amazon using one's credential, and then connecting to it using ssh.



References

Method #1: Using the AWS Console

Steps

The steps are fairly simple:

Launch instance from AWS console

  • Connect to the AWS console (see Tutorial 3 for a reminder), and then select Amazon EC2.
  • In the QuickStart tab, pick "Fedora LAMP Server", as a machine to instantiate.
  • Select 1 instance, pick the architecture of your choice, and No Preference for the zone.
  • Select Launch Instance (Spot Instances are low-rate machines that run only when the demand is low, and the user pays less).
  • Click on Continue (make sure your browser window is large enough to see the bottom part of the pop-up!)


AWS StartNewEC2Instance.png


  • Use defaults for Kernel Id and RamDisk Id.
  • No Monitoring
  • Click on Continue


AWS CreateKeyPairForEC2.png


  • Pick a name for your key-pair file (e.g. dftKeyPair), then click on Create New Key Pair.
  • When prompted, save the key-pair file (dftKeyPair.pem) to a local directory on your computer (Desktop, for example).
  • Follow the directions to create a security group (I called it dftGroup for simplicity).


AWS SecurityGroupForEC2.png


  • Review!
AWS ReviewEC2Instance.png


  • Launch!
  • Watch as the instance is created, and loads up...


AWS watchingInstanceLaunch.png


  • When the instance is created, right click on it and click on Connect

ConnectToInstanceOnEC2.png

Connecting using SSH

  • First create a working directory on your local computer (I'll assume you are using a Mac or a Linux box. Similar steps are easy to take for Windows)
  • Start a Terminal window
  • create a new working directory and copy the Key-Pair file into it:
 cd /
 mkdir aws
 cd aws
 cp  ~/Desktop/dftKeyPair.pem .
 chmod go-r dftKeyPair.pem
 ls -l 
 total 8
 -rw-------@ 1 thiebaut  wheel  1693 Apr 22 08:25 dftKeyPair.pem
  • Copy/Paste the ssh command into a shell that you will have started
 ssh -i dftKeyPair.pem root@ec2-75-101-234-143.compute-1.amazonaws.com
  • You should be connected!
  ssh -i dftKeyPair.pem root@ec2-75-101-234-143.compute-1.amazonaws.com 
  The authenticity of host 'ec2-75-101-234-143.compute-1.amazonaws.com...
  RSA key fingerprint is cd:79:eb:e5:e9:2e:d6:a2:9c:...
  Are you sure you want to continue connecting (yes/no)? yes 
  Warning: Permanently added 'ec2-75-101-234-143.compute-1.amazonaws.com,7...


        __|  __|_  )  Fedora 8
        _|  (     /    32-bit
       ___|\___|___|

  Welcome to an EC2 Public Image
                       :-)

   Base

--[ see /etc/ec2/release-notes ]--

 [root@ip-10-244-181-219 ~]#
  • You are now root of a machine on Amazon's cloud. Play with it!
  • Check that the mysql server is working:
  [root@ip-10-244-181-219 ~]# mysql
  Welcome to the MySQL monitor.  Commands end with ; or \g.
  Your MySQL connection id is 2
  Server version: 5.0.45 Source distribution

  Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

  mysql> show databases;
  +--------------------+
  | Database           |
  +--------------------+
  | information_schema | 
  | mysql              | 
  | test               | 
  +--------------------+
  3 rows in set (0.00 sec)
  
  mysql> quit
  • Add a new user
 [root@ip-10-244-181-219 ~]# adduser thiebaut
 [root@ip-10-244-181-219 ~]# ls /home
 thiebaut  webuser
 [root@ip-10-244-181-219 ~]#

Installing Software

  • Try editing a file with emacs...
  • Oops, emacs is not installed on the EC2 Instance. No big deal, we can install it. The installation package under Fedora is called yum:
   yum -y install emacs
  • Now try editing with emacs...  :-)



ComputerLogo.png
Lab Experiment #1
Run the multiprocessing version of the NQueens program on your new Instance and compare its execution time to the best time obtained so far.
The multiprocessing version of the N-Queens program is available here. An easy way to time the execution of multiple runs would be:
for i in {15..21} ; do echo -n $i
/usr/bin/time python2.6 multiprocessingNQueens.py $i 2>&1 | grep real
done
You will discover that the multiprocessing python module runs only with Python 2.6! So you'll have to install it before running the program. The steps are simple:
  • install gcc first
  • download the source code for Python2.6
  • untar it into a directory
  • compile it
  • install it
These steps are shown below
yum -y install gcc
wget http://www.python.org/ftp/python/2.6.5/Python-2.6.5.tgz
tar -xzvf Python-2.6.5.tgz
cd Python-2.6.5
./configure
make
make install
You should have python 2.6 available to you. To invoke it, simply use python2.6 at the command line.


Method #2: Using the EC2 Tools

Steps

  • Download the EC2 Tools from the Amazon EC2 Resource Center.
  • install them in ~/bin/ec2-api-tools (see the Getting Started Guide from Amazon for more info).
  • Download the pem files containing your private key and certificate from the Amazon EC2 page (see step above)
  • Modify your .bash_profile file and set several variables:


PATH=$PATH:/Users/thiebaut/bin/ec2-api-tools/bin

# Amazon AWS/EC2 tools 
export EC2_HOME=/Users/thiebaut/bin/ec2-api-tools
export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Home
export EC2_PRIVATE_KEY=~/.ssh/pk-WMW2M4ZVFMCZJXSXJN4D7ZS4RMTBJ7VV.pem
export EC2_CERT=~/.ssh/cert-WMW2M4ZVFMCZJXSXJN4D7ZS4RMTBJ7VV.pem
  • Source the .bash_profile file
source .bash_profile
  • Test the ec2 tools:
ec2-describe-images -a | grep hadoop-ec2-images
  • verify that a list of images is printed out.
IMAGE	ami-ee53b687	hadoop-ec2-images/hadoop-0.17.0-i386.manifest.xml	111560892610	available	public
		i386	machine	aki-a71cf9ce	ari-a51cf9cc		instance-store
IMAGE	ami-f853b691	hadoop-ec2-images/hadoop-0.17.0-x86_64.manifest.xml	111560892610	available	public
		x86_64	machine	aki-b51cf9dc	ari-b31cf9da		instance-store










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