OpenStack: Re-enable glance image import

We've seen on a few clouds that glance image import is enabled but configured improperly, leading the installer to block on image import.

When trying to create glance image via import, the image gets stuck in the uploading status and doesn't move to importing and then active as it should.

$ glance import-info
+----------------+----------------------------------------------------------------------------------+
| Property       | Value                                                                            |
+----------------+----------------------------------------------------------------------------------+
| import-methods | {"type": "array", "description": "Import methods available.", "value": ["glance- |
|                | direct", "web-download"]}                                                        |
+----------------+----------------------------------------------------------------------------------+

$ glance image-create-via-import --container-format=bare --disk-format=qcow2 --file /home/centos/rhcos.qcow2 --name rhcos-imported

$ openstack image show rhcos-imported
+------------------+------------------------------------------------------------------+
| Field            | Value                                                            |
+------------------+------------------------------------------------------------------+
| checksum         | None                                                             |
| container_format | bare                                                             |
| created_at       | 2020-04-02T08:00:56Z                                             |
| disk_format      | qcow2                                                            |
| file             | /v2/images/8307a69e-650b-41e8-a622-1969a2f9d95e/file             |
| id               | 8307a69e-650b-41e8-a622-1969a2f9d95e                             |
| min_disk         | 0                                                                |
| min_ram          | 0                                                                |
| name             | rhcos-imported                                                   |
| owner            | ef5bc5a705ee4a33acf95fbd6ca10d8f                                 |
| properties       | locations='[]', os_hash_algo=, os_hash_value=, os_hidden='False' |
| protected        | False                                                            |
| schema           | /v2/schemas/image                                                |
| size             | None                                                             |
| status           | uploading                                                        |
| tags             |                                                                  |
| updated_at       | 2020-04-02T08:00:56Z                                             |
| virtual_size     | None                                                             |
| visibility       | shared                                                           |
+------------------+------------------------------------------------------------------+

Everything seems to point to a misconfiguration of glance. This wouldn't work for example if glance was running behind httpd, or could also be an issue with multiple stores.

However, since we had multiple report of such issue, we decided to switch back to the usual image upload until we're able to detect if the cloud really supports glance direct image import: openshift/installer#3394

This issue tracks re-enabling glance image import.

References

• https://github.com/openshift/okd/issues/122

Start with openshift/installer#3394 and the Glance import behavior described here, including the linked Apache HTTPD and multiple-stores documentation. Determine how the installer can detect whether image import is actually supported; done means re-enabling import only for compatible clouds without blocking on images stuck in uploading.