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Working with Collaborators

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Project Membership exampleProjects have 1 Lead and any number of Admins, Members, and Auditors

http://groups.geni.net/geni/wiki/GENIConcepts#Project

Typical Class

Expiration

Typical Research Project

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Working with multiple members in a slice

Research AsstSlice Lead Post-Doc

Slice MemberProfessor

Slice Admin

Members of all slices in a project:

• Project Leads (Professor)• Project Admins (Post-docs, researchers)Other can be added manually

http://groups.geni.net/geni/wiki/GENIConcepts#Slice

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Slice AccessBeing a member of a slice means you can act on a slice:

– Add resources– Check status– Delete resources– Renew resources

With any tool!

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To ensure access in collaborator’s resources:Option 1: Make resource reservation from Portal or omniOption 2: Use a common public key

Add slice member’s accounts to existing resources:$ omni -V 3 poa SLICE geni_update_users

--useSliceAggregates –-useSliceMembersAlternatively…$ addMemberToSliceAndSlivers myslice username

Slice Access: Logging in to resources

Slice membership does not guarantee ability to login to resources!

Only works on InstaGENI/ProtoGENI

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Solutions to Common Problems

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Common Problems

Problem: Slice did not come up (“not green”)Possible causes:

– Did not wait long enough– Problem with RSpec

Debug strategy:– Check slice/sliver status– Use rspeclint on your rspecs

http://www.protogeni.net/wiki/RSpecDebugging

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Three ways to get SliverStatus

• Flack– “green” is good– Use “Get Status” button to refresh status

• Omni– Use readyToLogin

• Portal– On slice page, use “Ready?” button

Demo

Demo

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Common Problems

Problem: Resources disappearedPossible causes:

– Slice expired– Resources (aka slivers) expired

Debug strategy:– Check slice/sliver status– Reserve resources again if expired – Don’t rely on nodes for storage

• Edit scripts locally and scp to your nodes• Copy data off machines

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Expiration and renewal

slice expiration time ≤ project expiration timeeach resource expiration time ≤ slice expiration time

each resource expiration time ≤ aggregate’s max expiration

project

slice

resource(optional)

project expiration time

slice expiration time

resource expiration timenow

In general, to extend the lifetime of your resource reservation, you must renew the slice and all resources

resourceresource

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Extend slice/resource expirations

Slice and Sliver Expiration

$ omni renewslice 01-31-14

# renew each sliver individually$ omni renewsliver –a gpo-ig myslice 01-31-14$ omni renewsliver –a renci-eg myslice 01-31-14$ omni renewsliver –a missouri-ig myslice 01-31-14

# OR renew all known slivers for “as long as possible”$ omni -V 3 renew myslice 01-31-14 -–useSliceAggregates --alap

Hands-On

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Common ProblemsProblem: Can’t login to a nodePossible causes:

– Slice/sliver expired– Wrong username– Public key isn’t loaded, Private key is wrong or non-existing– Private key has wrong permissions (it should have 0600)– Technical issue with node

Debug strategy:1. Check the status of the sliver2. Try having a collaborator login

• Look for loaded keys sudo cat ~other_user_path/.ssh/authorized_keys

3. Ask them to use ‘-v’ optionssh –v foo@bar.example.net

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Clean up now!

Try this now:$ omni deletesliver SLICENAME --useSliceAggregates

sliceproject

aggregateexperimenter

resource