Chapter 12. Optional: Installing on Nutanix

Procedure

1. In Cluster details, select Nutanix from the Integrate with external partner platforms dropdown list. The Include custom manifest checkbox is optional.
2. In Host discovery, click the Add hosts button.

3. Optional: Add an SSH public key so that you can connect to the Nutanix VMs as the core user. Having a login to the cluster hosts can provide you with debugging information during the installation.

   1. If you do not have an existing SSH key pair on your local machine, follow the steps in Generating a key pair for cluster node SSH access.
   2. In the SSH public key field, click Browse to upload the id_rsa.pub file containing the SSH public key. Alternatively, drag and drop the file into the field from the file manager. To see the file in the file manager, select Show hidden files in the menu.

4. Select the desired provisioning type.

   Note

   Minimal image file: Provision with virtual media downloads a smaller image that will fetch the data needed to boot.

5. In Networking, select Cluster-managed networking. Nutanix does not support User-managed networking.

   1. Optional: If the cluster hosts are behind a firewall that requires the use of a proxy, select Configure cluster-wide proxy settings. Enter the username, password, IP address and port for the HTTP and HTTPS URLs of the proxy server.
   2. Optional: Configure the discovery image if you want to boot it with an ignition file. See Configuring the discovery image for additional details.
6. Click Generate Discovery ISO.
7. Copy the Discovery ISO URL.
8. In the Nutanix Prism UI, follow the directions to upload the discovery image from the Assisted Installer.

9. In the Nutanix Prism UI, create the control plane (master) VMs through Prism Central.

   1. Enter the Name. For example, control-plane or master.
   2. Enter the Number of VMs. This should be 3 for the control plane.
   3. Ensure the remaining settings meet the minimum requirements for control plane hosts.

10. In the Nutanix Prism UI, create the worker VMs through Prism Central.

    1. Enter the Name. For example, worker.
    2. Enter the Number of VMs. You should create at least 2 worker nodes.
    3. Ensure the remaining settings meet the minimum requirements for worker hosts.
11. Return to the Assisted Installer user interface and wait until the Assisted Installer discovers the hosts and each of them have a Ready status.
12. Continue with the installation procedure.

Procedure

1. Configure the discovery image if you want it to boot with an ignition file.

2. Create a Nutanix cluster configuration file to hold the environment variables:

   $ touch ~/nutanix-cluster-env.sh

   $ chmod +x ~/nutanix-cluster-env.sh

   If you have to start a new terminal session, you can reload the environment variables easily. For example:

   $ source ~/nutanix-cluster-env.sh

3. Assign the Nutanix cluster’s name to the NTX_CLUSTER_NAME environment variable in the configuration file:

   $ cat << EOF >> ~/nutanix-cluster-env.sh
   export NTX_CLUSTER_NAME=<cluster_name>
   EOF

   Replace <cluster_name> with the name of the Nutanix cluster.

4. Assign the Nutanix cluster’s subnet name to the NTX_SUBNET_NAME environment variable in the configuration file:

   $ cat << EOF >> ~/nutanix-cluster-env.sh
   export NTX_SUBNET_NAME=<subnet_name>
   EOF

   Replace <subnet_name> with the name of the Nutanix cluster’s subnet.

5. Refresh the API token:

   $ source refresh-token

6. Get the download URL:

   $ curl -H "Authorization: Bearer ${API_TOKEN}" \
   https://api.openshift.com/api/assisted-install/v2/infra-envs/${INFRA_ENV_ID}/downloads/image-url

7. Create the Nutanix image configuration file:

   $ cat << EOF > create-image.json
   {
     "spec": {
       "name": "ocp_ai_discovery_image.iso",
       "description": "ocp_ai_discovery_image.iso",
       "resources": {
         "architecture": "X86_64",
         "image_type": "ISO_IMAGE",
         "source_uri": "<image_url>",
         "source_options": {
           "allow_insecure_connection": true
         }
       }
     },
     "metadata": {
       "spec_version": 3,
       "kind": "image"
     }
   }
   EOF

   Replace <image_url> with the image URL downloaded from the previous step.

8. Create the Nutanix image:

   $ curl  -k -u <user>:'<password>' -X 'POST' \
   'https://<domain-or-ip>:<port>/api/nutanix/v3/images \
     -H 'accept: application/json' \
     -H 'Content-Type: application/json' \
     -d @./create-image.json | jq '.metadata.uuid'

   Replace <user> with the Nutanix user name. Replace '<password>' with the Nutanix password. Replace <domain-or-ip> with the domain name or IP address of the Nutanix plaform. Replace <port> with the port for the Nutanix server. The port defaults to 9440.

9. Assign the returned UUID to the NTX_IMAGE_UUID environment variable in the configuration file:

   $ cat << EOF >> ~/nutanix-cluster-env.sh
   export NTX_IMAGE_UUID=<uuid>
   EOF

10. Get the Nutanix cluster UUID:

    $ curl -k -u <user>:'<password>' -X 'POST' \
      'https://<domain-or-ip>:<port>/api/nutanix/v3/clusters/list' \
      -H 'accept: application/json' \
      -H 'Content-Type: application/json' \
      -d '{
      "kind": "cluster"
    }'  | jq '.entities[] | select(.spec.name=="<nutanix_cluster_name>") | .metadata.uuid'

    Replace <user> with the Nutanix user name. Replace '<password>' with the Nutanix password. Replace <domain-or-ip> with the domain name or IP address of the Nutanix plaform. Replace <port> with the port for the Nutanix server. The port defaults to 9440. Replace <nutanix_cluster_name> with the name of the Nutanix cluster.

11. Assign the returned Nutanix cluster UUID to the NTX_CLUSTER_UUID environment variable in the configuration file:

    $ cat << EOF >> ~/nutanix-cluster-env.sh
    export NTX_CLUSTER_UUID=<uuid>
    EOF

    Replace <uuid> with the returned UUID of the Nutanix cluster.

12. Get the Nutanix cluster’s subnet UUID:

    $ curl -k -u <user>:'<password>' -X 'POST' \
      'https://<domain-or-ip>:<port>/api/nutanix/v3/subnets/list' \
      -H 'accept: application/json' \
      -H 'Content-Type: application/json' \
      -d '{
      "kind": "subnet",
      "filter": "name==<subnet_name>"
    }' | jq '.entities[].metadata.uuid'

    Replace <user> with the Nutanix user name. Replace '<password>' with the Nutanix password. Replace <domain-or-ip> with the domain name or IP address of the Nutanix plaform. Replace <port> with the port for the Nutanix server. The port defaults to 9440. Replace <subnet_name> with the name of the cluster’s subnet.

13. Assign the returned Nutanix subnet UUID to the NTX_CLUSTER_UUID environment variable in the configuration file:

    $ cat << EOF >> ~/nutanix-cluster-env.sh
    export NTX_SUBNET_UUID=<uuid>
    EOF

    Replace <uuid> with the returned UUID of the cluster subnet.

14. Ensure the Nutanix environment variables are set:

    $ source ~/nutanix-cluster-env.sh

15. Create a VM configuration file for each Nutanix host. Create three control plane (master) VMs and at least two worker VMs. For example:

    $ touch create-master-0.json

    $ cat << EOF > create-master-0.json
    {
       "spec": {
          "name": "<host_name>",
          "resources": {
             "power_state": "ON",
             "num_vcpus_per_socket": 1,
             "num_sockets": 16,
             "memory_size_mib": 32768,
             "disk_list": [
                {
                   "disk_size_mib": 122880,
                   "device_properties": {
                      "device_type": "DISK"
                   }
                },
                {
                   "device_properties": {
                      "device_type": "CDROM"
                   },
                   "data_source_reference": {
                     "kind": "image",
                     "uuid": "$NTX_IMAGE_UUID"
                  }
                }
             ],
             "nic_list": [
                {
                   "nic_type": "NORMAL_NIC",
                   "is_connected": true,
                   "ip_endpoint_list": [
                      {
                         "ip_type": "DHCP"
                      }
                   ],
                   "subnet_reference": {
                      "kind": "subnet",
                      "name": "$NTX_SUBNET_NAME",
                      "uuid": "$NTX_SUBNET_UUID"
                   }
                }
             ],
             "guest_tools": {
                "nutanix_guest_tools": {
                   "state": "ENABLED",
                   "iso_mount_state": "MOUNTED"
                }
             }
          },
          "cluster_reference": {
             "kind": "cluster",
             "name": "$NTX_CLUSTER_NAME",
             "uuid": "$NTX_CLUSTER_UUID"
          }
       },
       "api_version": "3.1.0",
       "metadata": {
          "kind": "vm"
       }
    }
    EOF

    Replace <host_name> with the name of the host.

16. Boot each Nutanix virtual machine:

    $ curl -k -u <user>:'<password>' -X 'POST' \
      'https://<domain-or-ip>:<port>/api/nutanix/v3/vms' \
      -H 'accept: application/json' \
      -H 'Content-Type: application/json' \
      -d @./<vm_config_file_name> | jq '.metadata.uuid'

    Replace <user> with the Nutanix user name. Replace '<password>' with the Nutanix password. Replace <domain-or-ip> with the domain name or IP address of the Nutanix plaform. Replace <port> with the port for the Nutanix server. The port defaults to 9440. Replace <vm_config_file_name> with the name of the VM configuration file.

17. Assign the returned VM UUID to a unique environment variable in the configuration file:

    $ cat << EOF >> ~/nutanix-cluster-env.sh
    export NTX_MASTER_0_UUID=<uuid>
    EOF

    Replace <uuid> with the returned UUID of the VM.

    Note

    The environment variable must have a unique name for each VM.

18. Wait until the Assisted Installer has discovered each VM and they have passed validation.

    $ curl -s -X GET "https://api.openshift.com/api/assisted-install/v2/clusters/$CLUSTER_ID"
    --header "Content-Type: application/json"
    -H "Authorization: Bearer $API_TOKEN"
    | jq '.enabled_host_count'

19. Modify the cluster definition to enable integration with Nutanix:

    $ curl https://api.openshift.com/api/assisted-install/v2/clusters/${CLUSTER_ID} \
    -X PATCH \
    -H "Authorization: Bearer ${API_TOKEN}" \
    -H "Content-Type: application/json" \
    -d '
    {
        "platform_type":"nutanix"
    }
    ' | jq

20. Continue with the installation procedure.