http://www.ngs.ac.ukhttp://www.grid-support.ac.uk

http://www.eu-egee.org/http://www.pparc.ac.uk/http://www.nesc.ac.uk/

The NGS Portal

Guy Warner

NeSC Training Team

Induction to Grid Computing and the National Grid Service, Oxford University Computing Services, 5th-6th July 2005

A Problem!

• How do I authenticate myself to the Grid Services?

Grid Services

Command Line Usage of Grid Services

grid-proxy-init

Induction to Grid Computing and the National Grid Service, Oxford University Computing Services, 5th-6th July 2005

A Problem!

Grid Services

Portal Usage of Grid Services

Portal

??

Induction to Grid Computing and the National Grid Service, Oxford University Computing Services, 5th-6th July 2005

Solution: “MyProxy”

• Myproxy allows you to store a long-lived proxy in a “MyProxy repository” and derive a proxy certificate when needed.

• Allows you to:– Interact with a grid from many machines

• And you realise that you must NOT, EVER leave your certificate where anyone can find and use it.

– Use a portal, and delegate to the portal the right to act on your behalf (by logging in to an account that can make a proxy certificate for you)

– Run jobs that might last longer than the lifetime of a short-lived proxy

Induction to Grid Computing and the National Grid Service, Oxford University Computing Services, 5th-6th July 2005

Grid Authentication with MyProxy

Grid Services

MyProxyServer

NGS Portal

UI

A WorkStation

Web Browser1:

2: Any Grid Service

6: output

0: grid-proxy-init

myproxy-init

3: myproxy-get-delegation

4: execution

5: output

Induction to Grid Computing and the National Grid Service, Oxford University Computing Services, 5th-6th July 2005

The Portalhttps://portal.ngs.ac.uk