You need to provide some images for your instances to be created. These can be any images.
Login to the utility container (if using openstack-ansible deploy) or via cli as admin
Download the image locally.
wget http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img
Upload the image to openstack
glance image-create --name "cirros-test" --file cirros-0.3.4-x86_64-disk.img --disk-format qcow2 --container-format bare --visibility public --progress
+------------------+----------------------------------------------------------------------------------+ | Property | Value | +------------------+----------------------------------------------------------------------------------+ | checksum | ee1eca47dc88f4879d8a229cc70a07c6 | | container_format | bare | | created_at | 2016-04-02T11:51:33Z | | direct_url | rbd://e478110c-76fb-4d23-9d06-559a84cae578/glance-images/845ca59c-4e46-4615 | | | -83ad-1b07f7465d1e/snap | | disk_format | qcow2 | | id | 845ca59c-4e46-4615-83ad-1b07f7465d1e | | min_disk | 0 | | min_ram | 0 | | name | cirros-test | | owner | adf998ea387e4fb684246431de401047 | | protected | False | | size | 13287936 | | status | active | | tags | [] | | updated_at | 2016-04-02T11:51:34Z | | virtual_size | None | | visibility | public | +------------------+----------------------------------------------------------------------------------+