Version 36 (modified by, 9 years ago) (diff)


Lab Zero: A First Experiment Using GENI

Image Map

1. Design the Experiment

  1. In today's experiment you will use resources at the aggregate assigned to you. If you don't have a worksheet use Clemson InstaGENI (aka

2. Establish the Environment

2.1 Pre-work: Create a GENI account

  1. Go to and press the Use GENI button
  2. From the Drop Down menu select your institution. If you got an account through the GENI Identity Provider, please select GENI Project Office.
    Tip Start typing the name of your institution and see the list become smaller.
  3. You will be transferred to the Login Page of your institution. Fill in your username and password.
  4. Complete the form that appears after you have successfully logged in and press Continue.
  5. You will be transferred to an Activation Page. Make sure both checkboxes are checked and then press Activate.
Figure 2-1 Logging into the GENI Experimenter Portal.

Congratulations, you have successfully created a GENI account.

2.2 Pre-work: Project lead adds you to a project

In order to use the portal to reserve resources, you must join a project. We have created a project for this tutorial.

  1. The tutorial organizers should have added you to the project for this tutorial. On the home page, you should see that you are a member of at least one project.
    Tip If you are not doing this exercise as part of an in-person tutorial please sign up for a GENI account and join a project.

2.3 Generate and Download SSH Keypair

Access to compute resources in GENI is provided through ssh key pairs and thus the portal needs a public key to upload to compute resources. For the purposes of the tutorial we will have the portal create an SSH key pair for you. (However, if you prefer to use your personal public key you can choose to upload it.)

  1. Once you are logged in, click on the Profile page.
  2. On the Profile page in the SSH Keys section, select generate and download an SSH keypair button.
Generate an SSH Key Pair

Figure 2-2 On the Profile page, select the "generate and download an SSH keypair" button.
  1. Enter the same passphrase twice, then press Generate SSH private key.
Generate an SSH Key Pair
Figure 2-3 Enter passphrase twice, then generate SSH private key.
  1. Now, press the Download Private Key button
  2. If you are using a command line based ssh client, open a terminal and execute:
    $ mv ~/Downloads/id_geni_ssh_rsa ~/.ssh/.
    $ chmod 0600 ~/.ssh/id_geni_ssh_rsa
    $ ssh-add ~/.ssh/id_geni_ssh_rsa
    Later in the tutorial, this will allow you to log into your nodes securely without a password.
Download an SSH Key Pair
Figure 2-4 Download an SSH Key Pair.

2.4 Generate and Download SSL Certs

SSL certs are required to make the secure XML RPC calls to the aggregate managers. You can have the Portal create them for you.

  1. Go to your Profile tab on the GENI Portal.
  2. Click on SSL> under Profile
  3. Click on Create an SSL Certificate
Create SSL Cert
  1. Click on Generate Combined Certificate and Key File
  2. Download the file to your Downloads folder< /li>
  3. Click on Close
Create SSL Cert

3. Obtain Resources

Now that you are a member of a project, you can create a slice and reserve resources.

3.1 Create a slice

  1. Go to the Projects tab.
  2. Press the Create Slice button for this project.
  3. Use the slice name on your worksheet. If you don't have a worksheet, use lab0<your initials>. You can leave the description empty and press Create Slice
Create a GENI Slice
Figure 3-1 Create a new slice.

3.2 (optional) Renew your slice

Slices and the resources within them are reserved until their individual expiration times. Renewing allows you to extend the expiration time of your slice and the resources in them.

Warning Slices and the resources within them have distinct expiration times. You must renew both the slice and the resources separately.
  1. On the Slice page, select the Renew slice only radio button.
  2. Click on the date below. In the calendar that pops up, select a date in the near future.
  3. Press Renew to renew the slice. Renewing the slice now allows the resources to have longer initial expiration times.
Renew slice
Figure 3-2 Renew the slice.

3.3 Launch jFed to Reserve Two Virtual Machines at One Aggregate

The Portal is integrated with a tool, jFed, which allows you to draw topologies of GENI resources and then reserve them.
If you are on a Mac, you must us the Firefox (recommended) or Safari browsers.

  1. On the Slice tab, press the jFed button. jFed will open in a new window.
Launch jFed
Figure 3-3 Launch jFed
  1. Wait for jFed to load. jFed should look like the picture to the right. Click on the New to start a new experiment.
Figure 3-4 jFed after it has loaded.
  1. Find the aggregate listed on your worksheet.
  2. Click the VM box and drag it onto the canvas.
  3. InstaGENI If you are using resources at an InstaGENI aggregate:
        Click the XEN VM box and drag it onto the canvas.
    ExoGENI If you are using resources at an ExoGENI aggregate do:
        Click the VM box and drag it onto the canvas.
  4. Repeat the above step. You should now see two node boxes on the canvas.
  5. Now click near one of the node boxes on the canvas, then click and drag towards the other node. Release when you reach the other node. You should now see a line and a box representing a link connecting the two nodes.
  6. The canvas should now look like the picture on the right.
  7. To edit the name of each node, double click on the node box.
Two nodes connected by a link.
Figure 3-5 Two nodes connected by a link.
  1. In the "Name" field at the top, replace "node0" with "client".
  2. From the "Select testbed drop-down, pick the aggregate assigned to you. DO NOT forget to do this
  3. Repeat for the node labeled, "node1". In the "Name" field at the top, replace "node1" with "server" and select the aggregate assigned to you.
Relabel VM
Figure 3-6 Edit the name of the VM. Set the Sliver Type on ExoGENI racks.
  1. Now click on the "link" box.
  2. Enter an IP Address for this node of
  3. Enter a Mask of
  4. On the next line down, set that interface to the server's IP address of and a Mask of
Relabel VM
Figure 3-7 Edit the IP Address and Mask of the VM.
  1. Click the Run button near the top of the window.
Two VMs connected by a link
Figure 3-8 Two VMs connected by a link.
  1. When prompted, pick experiment details, such as your slice, and then hit OK.
Pick Experiment Details
Figure 3-9 Pick Experiment Details.

3.4 Check Whether Virtual Machines are Ready to be Used

  1. After clicking the OK button, wait for the canvas to turn green. (This may take awhile.)
  2. If the canvas doesn't eventually turn green, press the "Update Status" button.
  3. The canvas should now look like the picture on the right.
Resources are ready
Figure 3-9 Reservation complete. Nodes are ready to login.


Next: Execute