Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG –...
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Transcript of Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG –...
![Page 1: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/1.jpg)
Joining the Grid
Andrew McNab
![Page 2: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/2.jpg)
28 March 2006 Andrew McNab – Joining the Grid
Outline
● LCG – the grid you're joining
● Related projects● Getting a certificate–Care of your certificate
● Joining a Virtual Organisation–AUP
![Page 3: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/3.jpg)
28 March 2006 Andrew McNab – Joining the Grid
LCG
• The LHC Computing Grid (LCG)– http://www.cern.ch/LCG/– The worldwide computing infrastructure for
LHC– Led by CERN–Majority of resources are at the other sites
• Has more than 100 fully operational sites, in 31 countries– About 190 are operational at some level– Sites from US to Japan, but mostly in Europe
![Page 4: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/4.jpg)
28 March 2006 Andrew McNab – Joining the Grid
LCG: World
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28 March 2006 Andrew McNab – Joining the Grid
LCG: Europe
![Page 6: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/6.jpg)
28 March 2006 Andrew McNab – Joining the Grid
LCG: by region
![Page 7: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/7.jpg)
28 March 2006 Andrew McNab – Joining the Grid
LCG: by region
![Page 8: Joining the Grid Andrew McNab. 28 March 2006Andrew McNab – Joining the Grid Outline ● LCG – the grid you're joining ● Related projects ● Getting a certificate.](https://reader035.fdocuments.net/reader035/viewer/2022062323/56649d645503460f94a471dd/html5/thumbnails/8.jpg)
28 March 2006 Andrew McNab – Joining the Grid
Related projects
• EGEE is also led by CERN– Develops software to be adopted by LCG– EU-funded, and intended to get non-HEP on board
• GridPP is the PPARC-funded UK HEP grid project– Runs LCG in the UK– Contributes effort to EGEE
• The National Grid Service (NGS): non-HEP UK grid– Increasingly adopting ideas/software from LCG
• Open Science Grid (OSG): the US DoE/NSF grid– Increasingly interoperates with LCG
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28 March 2006 Andrew McNab – Joining the Grid
Getting a cert
• All authentication on LCG is done by X.509 digital certificates– these contain a unique name for each user– “/C=UK/O=eScience/OU=Manchester/L=HEP/CN=andrew
mcnab”
• To use LCG you need to get a certificate• This requires proving who you are with photo ID• For the UK Certification Authority, you start this
via their website– https://ca.grid-support.ac.uk/
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28 March 2006 Andrew McNab – Joining the Grid
Requesting the cert
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28 March 2006 Andrew McNab – Joining the Grid
Certificate process
• Apply for the certificate on the CA website– Choose the right Registration Authority (RA)– “Manchester HEP” in our case
• Go to the RA operator (Sabah in our case) and provide your photo ID
• You receive an email from the CA when your certificate is ready (a day or so – the signing machine is offline)
• You can then load it into your web browser from the CA website
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28 March 2006 Andrew McNab – Joining the Grid
Care of your cert
● Applying for the certificate has created a secret Private Key (a huge number) and a Public Key (another huge number) which the CA has turned into a certificate
● These are inside your web browser at the end of the process
● Any body with access to your web browser or the Private Key can pretend to be you – so treat it like a password
● There are instructions on the CA website for getting your certificate and private key out the browser, and into the file used by the Grid command line tools
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28 March 2006 Andrew McNab – Joining the Grid
Virtual Organisations
● Your certificate proves who you are, but doesn't give you access to any sites
● To get that, you need to join a Virtual Organisation (VO), like ATLAS or BaBar
● Use the “User Registration” link from http://www.cern.ch/LCG/ and follow the instructions
● Different VOs have slightly different procedures– it always involves associating your certificate
with your request to join– then a manager of the VO decides if you really
are a bona fide member of that collaboration
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28 March 2006 Andrew McNab – Joining the Grid
AUP
● Joining a VO requires accepting the LCG Acceptable Usage Policy
● This is a common AUP accepted by all LCG sites– Avoids the need to fax off 190 different Computer
Centre forms when you join● The AUP is very short – less than a page – and pretty innocuous– basically: “Don't abuse the sites” and “You're
legally responsible for what you do.”– In return, you get access to a huge amount of
CPU, with local accounts created for you on demand