Adding users to the slices using OMNI

[Raj Thakkar]

Hello everyone,

                              I was trying to add users in my slice using edit slice membership option in portal. Is there any way to add members to the slice from OMNI?  Is there any commands we can use through OMNI to add members to slice as soon as we create a slice and start the experiment. I want to add members to the slice from very beginning for my experiment.

Thank you

Regards

Raj Thakkar 

 

               

[Aaron Helsinger]

Yes, you can do this.

In general, you should edit the membership of your slice before reserving resources, to be sure that all users can log in to all the compute resources that you reserve. But in some cases, you can add members after your reservation.

Here are some instructions for doing these things with Omni. This message largely repeats instructions listed on the Omni wiki here: http://trac.gpolab.bbn.com/gcf/wiki/HowTo/UseCHAPIInOmni

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Adding members to a slice and to existing slivers:

If you have not already done so, update to Omni 2.5, and re-configure your omni by re-downloading your Omni bundle from the GENI Portal and re-running omni-configure. If you need help doing this, ask.

Once you have done that, you can do a number of things:

1) You can add a new member to your slice (just like the operation at the portal).
Example:
You have a project MyProject.
JoeSmith is in MyProject (and has at least 1 SSH key registered), but Joe is not in your slice MySlice.
The omni command "addslicemember <slicename> <member username>" will add Joe as a member of the slice.
Note that this does NOT install Joe's SSH keys on any existing sliver reservations/ nodes in your slice.

To confirm that this did what you expect, you can list the members of your slice:
omni listslicemembers <slicename>

2) Once you have re-configured Omni for Omni2.5, all members of your Portal slice will have their SSH keys installed on NEW slivers/nodes that you reserve using Omni.
So for example, if you added Joe using "addslicemember" per step 1, then Joe cannot yet log in to the nodes you already have reserved. But if you then reserve resources at a new aggregate, Joe's SSH keys will be installed on that new node, and Joe can log in.

3) At InstaGENI racks, it is possible to update the SSH keys that are installed on existing nodes/slivers.
So assume you added Joe to MySlice per step 1 above. You want Joe to be able to log in to your existing nodes (not just new nodes).
You can do the following:

omni -V3 --useSliceAggregates --useSliceMembers poa <slicename> geni_update_users

This command, while it may take a while, will ensure that all members of your slice as listed at the portal have their registered SSH keys installed on all your existing InstaGENI nodes (include anyone you added with 'addslicemember' per step 1).

4) You can combine steps 1 and 3, to both add a new member to your slice and install their keys on existing slivers, using a simple script that just calls both functions for you. This script is available for Linux users of Omni as examples/addMemberToSliceAndSlivers.py. Usage: addMemberToSliceAndSlivers <slicename> <username>

I hope this helps,

Aaron

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[Raj Thakkar]

Thank you Aaron for the reply. I will follow the steps you have mentioned to add users to the slice.

Regards

Raj Thakkar

[Raj Thakkar]

Hello Aaron,

                         I tried the commands mentioned in the link to add users to the slice and also see the list of members to the slice, but it is giving some error related to framework type pgch, do i need tp provide more  information in the command? The attached screenshot is the error when i try to run the command.

Error: listslicemembers is not supported at this clearinghouse using framework type pgch

Thank you

Regards

Raj Thakkar

[Aaron Helsinger]

As I mentioned in my original note, you need to re-configure your omni. Specifically, it will set up your omni to use the new "chapi" framework. Download your omni bundle and re-run omni-configure.

Aaron