Glance ships with an example configuration file, in its source directory /etc/glance.conf.sample. Feel free to take a look at the settable options there.
Glance uses the Filesystem storage backend by default, and by default, this storage backend writes new images to /var/lib/glance/images. You should either create that directory and ensure the user running Glance has write permissions on that directory, or change the filesystem_store_datadir configuration value to a directory that is writeable.
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You can use a dashboard interface with an OpenStack Compute installation with a web-based console provided by the Openstack-Dashboard and Django-Nova projects. Together they provide a reference implementation of a Django site that provides web-based interactions with the OpenStack Compute cloud controller. For more information about the Django-Nova project, please visit: http://launchpad.net/django-nova. These instructions are for a test deployment of an OpenStack Dashboard. They configure your dashboard to use a sqlite3 database and the default Django server. To create a more robust, production-ready installation, you would configure this with an Apache web server and MySQL/Postgres database.