anchor.diff:  stop,server stop,Stop the server(s).
   suspend,server suspend,Suspend a server.
   trigger-crash-dump,server dump create,Trigger crash dump in an instance.
  -topology,openstack server show --topology,Retrieve server NUMA topology.
   unlock,server unlock,Unlock a server.
   unpause,server unpause,Unpause a server.
   unrescue,server unrescue,Restart the server from normal boot disk again.
   unshelve,server unshelve,Unshelve a server.
  -update,server set / unset --description,Update or unset the description for a server.
  -update,server set --name,Update the name for a server.
  +update,server set / unset,Update the name or the description for a server.
   usage,usage show,Show usage data for a single tenant.
   usage-list,usage list,List usage data for all tenants.
   version-list,,List all API versions.
  -virtual-interface-list,,Show virtual interface info about the given server.
   volume-attach,server add volume,Attach a volume to a server.
   volume-attachments,server show,List all the volumes attached to a server.
   volume-detach,server remove volume,Detach a volume from a server.
   volume-update,,Update volume attachment.
  -x509-create-cert,WONTFIX,Create x509 cert for a user in tenant.
  -x509-get-root-cert,WONTFIX,Fetch the x509 root cert.
  -bash-completion,complete,Prints all of the commands and options to
  +bash-completion,complete,Prints all of the commands and options to stdout so that the nova.bash_completion script doesn't have to hard code them.
   help,help,Display help about this program or one of its subcommands.
  
positive.code: availability-zone-list,availability zone list,List all the availability zones.
  backup,server backup create,Backup a server by creating a 'backup' type snapshot.
  boot,server create,Boot a new server.
  cell-capacities,,Get cell capacities for all cells or a given cell.
  cell-show,,Show details of a given cell.
  clear-password,server set --root-password,Clear the admin password for a server from the metadata server.
  cloudpipe-configure,WONTFIX,Update the VPN IP/port of a cloudpipe instance.
  cloudpipe-create,WONTFIX,Create a cloudpipe instance for the given project.
  cloudpipe-list,WONTFIX,Print a list of all cloudpipe instances.
  console-log,console log show,Get console log output of a server.
  delete,server delete,Immediately shut down and delete specified server(s).
  diagnostics,openstack server show --diagnostics,Retrieve server diagnostics.
  
negative.code: flavor-key,flavor set / unset,Set or unset extra_spec for a flavor.
  flavor-list,flavor list,Print a list of available 'flavors'
  flavor-show,flavor show,Show details about the given flavor.
  flavor-update,,Update the description of an existing flavor. (Supported by API versions '2.55' - '2.latest') [hint: use '--os-compute-api- version' flag to show help message for proper version]
  force-delete,server delete,Force delete a server.
  get-mks-console,console url show --mks,Get an MKS console to a server. (Supported by API versions '2.8' - '2.latest') [hint: use ' --os-compute-api-version' flag to show help message for proper version]
  get-password,WONTFIX,Get the admin password for a server. This operation calls the metadata service to query metadata information and does not read password information from the server itself.
  get-rdp-console,console url show --rdp,Get a rdp console to a server.
  get-serial-console,console url show --serial,Get a serial console to a server.
  get-spice-console,console url show --spice,Get a spice console to a server.
  get-vnc-console,console url show --novnc,Get a vnc console to a server.
  host-evacuate,,Evacuate all instances from failed host.
  host-evacuate-live,,Live migrate all instances off the specified host to other available hosts.
  host-meta,,Set or Delete metadata on all instances of a host.
  host-servers-migrate,,Cold migrate all instances off the specified host to other available hosts.
  hypervisor-list,hypervisor list,List hypervisors. (Supported by API versions '2.0' - '2.latest')
  hypervisor-servers,,List servers belonging to specific hypervisors.
  hypervisor-show,hypervisor show,Display the details of the specified hypervisor.
  hypervisor-stats,hypervisor stats show,Get hypervisor statistics over all compute nodes.
  