Identifying VMs Associated with a Specific Security Group in OpenStack

Problem

How to identify Virtual Machines (VMs) that are associated with a specific Security Group within their OpenStack environment using CLI.

Environment

• Platform9 Managed OpenStack - v4.0 and Higher

Procedure

1. Identify Ports Associated with a Security Group:

• Open a terminal session and authenticate with your OpenStack environment.
• Execute the following command to list all ports associated with the desired Security Group. Replace <security_group_id> with the actual ID of the Security Group you are interested in:

openstack port list --long --fit | grep <security_group_id>

• Note down the port IDs returned by the command.

2. Find VMs Attached to These Ports:

• For each port ID identified in the previous step, execute the following command to display details about the port. Replace <port_id> with the actual port ID:

openstack port show --fit <port_id>

• Look for the device_id __field in the output of each command. This device_id is the ID of the VM attached to the port.

3. Retrieve VM Details:(Optional)

• If further details about the VM are required, use the following command, replacing <vm_id> with the device_id found in the previous step:

openstack server show <vm_id>

• This command will provide comprehensive details about the VM, including its name, status, and other relevant information.

Additional Information

• For more details on managing Security Groups in OpenStack, refer to the official OpenStack documentation.