Riccardo Bruno, INFN'CT

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GENIUS Exercises

• Riccardo Bruno, INFN.CT
• Sevilla, 10-14/09/2007

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Practical information

• GENIUS Tutorial website
• https//glite-tutor.ct.infn.it
• Tutorial accounts on glite-tutor
• Username sevillaXX where XX goes from 01 to 30
• Password GridSEVXX where XX goes from 01 to 30
• when issuing the myproxy-init command
• Myproxy password SEVILLA for all the accounts

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Introduction 2 Authentications

• 1. Authentication with the User Interface
• 2. Authentication to the Grid.

sevillaXX
Input password of the user account GridSEVXX
sevillaXX
Input password of the proxy (specified when you
shall execute myproxy-init)
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First Exercise

• GENIUS logging in and base settings

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Outline of the exercise 1/2

• Login at your UI account (passwd GridSEVXX)
• Store a proxy on a remote Myproxy Server machine
  with the command (using the passphrase SEVILLA)
• myproxy-init --voms gilda
• Test to retrieve a local proxy from MyProxy
  server (not mandatory)
• myproxy-get-delegation (must use your new
  MyProxy passphrase)

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Outline of the exercise 2/2

• Verify your new local proxy
• voms-proxy-info --all
• Destroy your local proxy with the command and
  then inspect it
• voms-proxy-destroy
• Go on the https//glite-tutor.ct.infn.it
  (Preferences/Set VO VOMS), insert your Myproxy
  passphrase when requested and select the gilda
  VO.
• Come back on the terminal and execute
• voms-proxy-info --all
• - Do only if you delegated a proxy on the UI

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myproxy-init --voms gilda
Password SEVILLA
Choose a new password This password will be
referred as myproxy password
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Get credentials from the MyProxy srv
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Destroying local voms proxy
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The Genius Home Page
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InteractiveSet Desktop Password
Login the UI to set desktop password Password is
GridSEVXX
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InteractiveSet Desktop Password
Set Desktop password
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InteractiveOpen Desktop
Input the password just set
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myproxy-init on interactive desktop
Password SEVILLA
Choose a new password This password will be
referred as myproxy password
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Getting proxy delegation
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One can destroy local proxy
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authenticating on GENIUS with myproxy
GRID authentication The password is the one set
when issued the myproxy-init command
sevillaXX
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check again the proxy credentials
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Check again the proxy credentials
The GENIUS portal contacts the MyProxy
server which issues a temporary proxy
certificate on behalf of the user
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Interactive Close Desktop
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Second Exercise

• Launch a job described by a JDL which already
  exists in the UI
• We suppose to have the JDL file and all the other
  required data (input sandbox files) on the UI and
  we shall try to submit the job on the GRID

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Authentication with MyProxy
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GRID Settings
2) SET Default services LFC, RB, MxProxy,
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Available resources (matchmaking)
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Resources available matchmaking
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Job Submission JDL file selection
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Job Submission Ready to submit
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Job Submission Choosing the RB
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Job successfully submitted
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Job completed successfully
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Retrieving Job results 1/3
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Retrieving Job results 2/3
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Retrieving job results 3/3
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Third Exercise

• Preapare a job described by a JDL and store it on
  the UI
• In this exercise we are going to create a new
  file on the UI called hostnametest.jdl describing
  a simple job

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Login on the UI
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First step create the JDL file
JobType "Normal" Executable
"/bin/hostname" StdOutput "std.out"
StdError "std.err" OutputSandbox
"std.out","std.err"
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Inspecting our JDL
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Fourth Exercise

• Submit the job described by the JDL created in
  the previous exercise
• In this exercise we are going to submit the job
  described by the JDL file edited in the previous
  step

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Submitting the JDL 1/4
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Submitting the JDL 2/4
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Submitting the JDL 3/4
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Submitting the JDL (4/4)
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Retrieving job results
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Resources matchmaking
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Fifth Exercise

• Preparing a job described by the JDL with a file
  to ship in the input sandbox
• In this exercise we are going prepare the JDL
  description for a job which executes a shell
  script. The .sh file will be shipped to the CE
  through the input sendbox

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Step 1 Create the shell script
!/bin/sh MY_NAME"Your name" WORKER_NODE_NAME
(hostname) echo "Hello MY_NAME, from
WORKER_NODE_NAME" ls -a echo "This job is
running on this CE " /opt/edg/bin/edg-brokerinfo
getCE
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Step2 create the JDL file
Executable "startScript.sh" StdOutput
"std.out" StdError "std.err"
VirtualOrganisation "gilda" InputSandbox
"startScript.sh" OutputSandbox
"std.out","std.err",".BrokerInfo" RetryCount
7
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Sixth Exercise

• Submitting the job prepared in the previous
  exercise
• In this exercise we are going submit the job
  which executes a shell script, prepared in the
  previous exercise. The .sh file will be shipped
  to the CE through the input sandbox

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List of available resources
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Step 1 submitting job
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Step 2 retrieving the results