glance-manage isn't very helpful if it is run without any arguments. Compare against nova-manage and cinder-manage:
$ nova-manage
usage: nova-manage [-h] [--config-dir DIR] [--config-file PATH] [--debug]
[--log-config-append PATH] [--log-date-format DATE_FORMAT]
[--log-dir LOG_DIR] [--log-file PATH] [--log-format FORMAT]
[--nodebug] [--nouse-syslog] [--nouse-syslog-rfc-format]
[--noverbose] [--syslog-log-facility SYSLOG_LOG_FACILITY]
[--use-syslog] [--use-syslog-rfc-format] [--verbose]
[--version] [--remote_debug-host REMOTE_DEBUG_HOST]
[--remote_debug-port REMOTE_DEBUG_PORT]
{version,bash-completion,shell,logs,db,vm,agent,host,flavor,vpn,floating,project,account,network,service,cell,fixed}
...
nova-manage: error: too few arguments
$ cinder-manage
OpenStack Cinder version: 2014.2
/usr/local/bin/cinder-manage category action [<args>]
Available categories:
db
volume
host
shell
logs
service
config
version
backup
Glance-manage, on the other hand shows very little extra information:
$ glance-manage
usage: glance-manage [options] <cmd>
glance-manage: error: too few arguments
Fix proposed to branch: master /review. openstack. org/158654
Review: https:/