User's Guide: Compute Nodes

Introduction

Compute Nodes

Compute nodes are bare metal servers or virtual machines running in cloud or on-premise.​

Users can label compute nodes when registering to Enclave Manager to provide identity and policy management on the compute nodes​. Before running a Compute Node, it must be enrolled in the Fortanix Enclave Manager. This is called the Node Enrollment process. 

Node Agent

Fortanix Node Agent software enables registration of the compute nodes to Fortanix Enclave Manager when installed on a compute node​.

The Node Agent assists in the verification of Hardware and Platform software running on the compute nodes.

The Node Agent also assists with application attestation and visibility for Enclave Manager

Enroll Compute Nodes

Option 1: Enroll a Compute Node Using Azure Marketplace

1. First, generate a Join Token using Enclave Manager UI. To generate your Join Token, please log in to https://em.fortanix.com and in the Management Console tab, click the + ENROLL NODE button.
                                                                       Figure 1: Enroll compute node
    
2. In the next screen click the GENERATE TOKEN button to generate Join Token. This Join Token is used by the compute node to authenticate itself.
                                                           Figure 2: Generate token
    
3. A join Token will be generated in the text box for "Get a join token to register an SGX compute node".
4. Click the copy icon to copy the Join Token (Figure 3).
                                                 Figure 3: Copy Join Token
    
5. Now, create the Node Agent to register the compute node using the following URL:
   https://azuremarketplace.microsoft.com/en-us/marketplace/apps/fortanix.rte_node_agent. 
6. Click the GET IT NOW button in the “Fortanix Confidential Computing Node Agent” page.
    
                                                              Figure 4: Get the node agent
7. Click Continue in the pop-up window.
                                                              Figure 5: Confirm creating app in Azure
8. In the Node Agent preview page, click Create.
                                                         Figure 6: Proceed to create a node agent
    
9. In the Create Fortanix Confidential Computing Node Agent form (Figure 7), fill all the necessary details.
   1. In the Region field, select either (US) East US, (UK) South UK, or Central Canada (more regions will be added as Azure adds Confidential Computing support to more regions).
      NOTE: Fortanix Enclave Manager service is currently available in the above regions.
   2. In the Join Token field, paste the join token that you had generated using the Fortanix Enclave Manager UI.
       
10. Click the Review + create button to validate the node agent details.
                                                                         Figure 7: Validate node agent
     
11. Wait for the validation to pass.
12. Once the validation is successful, click Create to create the node agent.
                                                                     Figure 8: Create node agent
     
                                                                        Figure 9: node agent created
     
13. Once the node agent is created, the compute node will be enrolled in the Enclave Manager, you will see it under the Compute Nodes overview table.
                                                                        Figure 10: Enrolled node
14. Add Labels: To control which applications are allowed to run on which nodes, we add Labels for applications and nodes in the form of “Key:Value” pairs. Refer to Application and Compute Node Policy Enforcement for more details.
    1. Suggested Labels – This field will show the top 10 labels that are frequently used by users of an account.
    2. Add Labels – Enter the Key and Value pair and click the LABEL button to save the label. The newly created label will appear in the Labels Added field. A user can also choose an existing label from the Suggested Labels field.
       Example of a “Key:Value” pairs is – “Location:Location_name” where “Location” is the Key and “Location_name” is the Value of the key such as “South UK”.
        NOTE:
       • A label's key and value can have a maximum of 256 characters and is case-sensitive.
       • Some keys are reserved for internal use which are called system defined labels.
         • Such as: 'Fortanix', 'fortanix', ‘EM’, ‘em’, enclavemanager. Or
         • {Fortanix|Fortanix|EM|em|enclavemanager|Enclavemanager}<Any_Non-Alphanumeric-Char><Any-Char>.
       • If we are adding labels for an application then it is mandatory to add the same labels on the node on which the application will run.
       • A node can have multiple labels that belong to different applications. For example:
         App1’s label => Location1: Value1
         App2’s label => Location2: Value2
         Then the Node can have labels => Location1: Value1 , Location2: Value2.
         
                                                             Figure 11: Node label

Option 2: Enroll a Compute Node Using a Confidential Computing VM

1. Click the following URL to download the Node Agent:
   Download Node Agent. 
2. Extract the content of the Node-Agent_Installer.tar package and open the folder.
3. Open the READ_ME.txt file which contains the steps to enroll the compute node in Enclave Manager.
                                                          Figure 11: READ_ME.txt
     The READ_ME.txt has the following steps to enroll a compute node in Enclave Manager:
    
4. This script assumes that you already have a DCsV2 series VM. For more information, visit https://docs.microsoft.com/en-us/azure/virtual-machines/dcv2-series
5. The Node Agent listens on port 9092, so please open the port 9092 on your VM if not done already.
6. Enroll your compute node in Enclave Manager:
   1. Copy the files em-agent.conf, em-agent.deb, sgx-installer.bin, and installer.sh to your VM.
   2. Run the installer.sh using the command:

      -bash installer.sh <join_token>
      

7. To generate your Join Token, please log in to https://em.fortanix.com, and in the Management Console tab, click the + ENROLL NODE button.
                                                                        Figure 12: Enroll compute node
    
8. In the following screen click the GENERATE TOKEN button to generate Join Token. This Join Token is used by the compute node to authenticate itself.
                                             Figure 13: Generate token
    
9. A join Token will be generated in the text box for "Get a join token to register an SGX compute node".
10. Click the copy icon to copy the Join Token (Figure 14).
                                                     Figure 14: Copy Join Token
11. Run the installer.sh with the Join Token that you copied. This will enroll the compute node in Enclave Manager.
12. Once the compute node is enrolled in Enclave Manager, you will see it under the Compute Nodes overview table.                                                                           Figure 15: Enrolled node

Manage Nodes using Fortanix Enclave Manager

1. Sign in to the Fortanix Enclave Manager UI, and navigate to the COMPUTE NODES tab in the Management Console.
2. Click the IP address of the node that you want to investigate. An information screen opens.
3. On the information screen, you can choose to deactivate/delist the node or download the certificate that is used. To download the certificate, refer to the next section, Download Enclave Manager certificate.

Download Enclave Manager Node Attestation Certificate

To download the EM node attestation certificate:

1. Go to the COMPUTE NODES tab in the Management Console, and then click the compute node for which you want to download the certificate.                                                                        Figure 16: Select node
2. You can download the certificate from the Compute Node detailed view using the Download option on the right. This certificate contains Intel SGX details such as CPUSVN (CPU Security Version Number) of the compute node, MRENCLAVE of the node agent software, and so on, as seen from the screenshot below.
                                                                    Figure 17: Download Certificate