nova:tldr:c05da

This command is using the OpenStack command-line tool called "nova" to create a new virtual machine instance.

Here is a breakdown of the command:

• "nova boot": This tells the "nova" command-line tool to create a new instance.
• "--nic net-id=${net_id}": This option specifies the network for the virtual machine instance. The "net-id" refers to the unique identifier of the network to which the instance will be connected. The value of "${net_id}" is a placeholder that should be replaced with the actual network identifier.
• "--image ${image_id}": This option specifies the image that will be used to create the instance. The "image_id" refers to the unique identifier of the image to be used. The value of "${image_id}" is a placeholder that should be replaced with the actual image identifier.
• "--flavor ${flavor}": This option specifies the flavor (configuration) for the instance. The "flavor" is predefined in OpenStack and refers to the amount of resources allocated to the instance. The value of "${flavor}" is a placeholder that should be replaced with the actual flavor.
• "--availability-zone nova:${host_name}": This option specifies the availability zone in which the instance should be launched. The "nova" refers to the Nova compute service, and "${host_name}" is a placeholder for the specific compute host where the instance will be created.
• "${vm_name}": This is the name of the virtual machine instance that will be created. The value of "${vm_name}" is a placeholder that should be replaced with the desired name for the instance.