OpenStack Server List Command Takes a Long Time to Execute

Problem

When you are trying to query the list of servers within a specific project or across the entire region, it takes a long time to get a response using the OpenStack__CLI.

Environment

• Platform9 Managed OpenStack - All Versions

• Nova

• OpenStack CLI - v3.12.0 and above

Cause

When running the openstack server list command using OpenStack CLI, GET calls are also generated to list Glance__images as well as all the flavors in the region. This is done in batches of 20 and takes a long time if there are a lot of images and flavors in the region. The reason behind querying the images and flavors is to display names instead of UUIDs in the server list output.

Resolution

1. To avoid long query time, run the server list command with the --no-name-lookup (-n)flag. This will not generate any GET calls to Glance or Nova for listing images and flavors with their names. A few examples are shown below.

Javascript

# openstack server list --project <project-ID> --no-name-lookup
# openstack server list --all-projects --no-name-lookup
                  
# openstack server list --project <project-ID> -n
# openstack server list --all-projects -n

Additional Information

Python OpenStack Client v3.12.0 Release Notes