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Launching and Deleting a Greenfield Bare Metal Server

This topic describes how to launch a greenfield bare metal server.

  1. In the Contrail Web UI, select Workloads > Instances > Create Instance.
  2. From the Server Type Field, select New Bare Metal Server.
  3. Select the boot source, BMS image, and the BMS flavor available for the server type selected.
  4. Click Create.

    Following BMS launch, the BMS PXE boots from the ironic-provision network. The ironic-provision network is not visible to the tenant. BMS then connects to the provisioning network, connects to the TSN node, and gets a temporary IP address from the subnet of the provisioning network. This temporary IP address is not visible to the tenant. BMS downloads the boot image from the TFTP server and saves it locally for subsequent local boots. After the BMS is ready, it reboots. This time, the BMS boots from local image. During the second reboot, the BMS is disconnected from the ironic-provision network and is connected to the tenant network. This process of transferring from the ironic-provisioning network to the tenant network is called Network Flip. Then, the TSN node provides the BMS an IP address from the tenant network. Once the BMS boots and is ready for use, it is connected to tenant network.

The tenant can delete a BMS when it is not needed in the network. When a BMS is disconnected from the tenant network, it is connected to the cleaning-network or the ironic-provisioning network. This network flip is done to prevent snooping of hackers when the BMS is being cleaned up. The ironic-provisioning network cleans up the server moves it back to the pool of available servers, to be ready for redeployment as a new BMS.

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