OpenStack Wallaby : Add VM images to Glance2021/04/18

	Add Virtual Machine images to Glance.
[1]	For example, Create a Virtual Machine image of ubuntu 20.04.

# create a directory for disk image

root@dlp ~(keystone)#

mkdir -p /var/kvm/images

# download the official disk image

root@dlp ~(keystone)#

wget http://cloud-images.ubuntu.com/releases/20.04/release/ubuntu-20.04-server-cloudimg-amd64.img -P /var/kvm/images

# if you'd like to change settings in the image, do like follows

# mount disk image

root@dlp ~(keystone)#

modprobe nbd

root@dlp ~(keystone)#

qemu-nbd --connect=/dev/nbd0 /var/kvm/images/ubuntu-20.04-server-cloudimg-amd64.img

root@dlp ~(keystone)#

mount /dev/nbd0p1 /mnt

root@dlp ~(keystone)#

vi /mnt/etc/cloud/cloud.cfg

# line 13 : add

# only the case you'd like to allow SSH password authentication

ssh_pwauth: true

# line 96: change

# only the case if you'd like to allow [ubuntu] user to use SSH password auth

system_info:
   # This will affect which distro class gets used
   distro: ubuntu
   # Default user name + that default users groups (if added/used)
   default_user:
     name: ubuntu
     lock_passwd: False
     gecos: Ubuntu

root@dlp ~(keystone)#

umount /mnt

root@dlp ~(keystone)#

qemu-nbd --disconnect /dev/nbd0p1

/dev/nbd0p1 disconnected

# add image to Glance

root@dlp ~(keystone)#

openstack image create "Ubuntu2004" --file /var/kvm/images/ubuntu-20.04-server-cloudimg-amd64.img --disk-format qcow2 --container-format bare --public

+------------------+------------------------------------------------------------------------------+
| Field            | Value                                                                        |
+------------------+------------------------------------------------------------------------------+
| container_format | bare                                                                         |
| created_at       | 2021-04-15T05:03:43Z                                                         |
| disk_format      | qcow2                                                                        |
| file             | /v2/images/8df08a02-7c19-465e-8862-53eb2319918d/file                         |
| id               | 8df08a02-7c19-465e-8862-53eb2319918d                                         |
| min_disk         | 0                                                                            |
| min_ram          | 0                                                                            |
| name             | Ubuntu2004                                                                   |
| owner            | da2214d30eaa4b7aaae25c8cbba0483e                                             |
| properties       | os_hidden='False', owner_specified.openstack.md5='', owner_specified.op..... |
| protected        | False                                                                        |
| schema           | /v2/schemas/image                                                            |
| status           | queued                                                                       |
| tags             |                                                                              |
| updated_at       | 2021-04-15T05:03:43Z                                                         |
| visibility       | public                                                                       |
+------------------+------------------------------------------------------------------------------+

root@dlp ~(keystone)#

openstack image list

+--------------------------------------+------------+--------+
| ID                                   | Name       | Status |
+--------------------------------------+------------+--------+
| 8df08a02-7c19-465e-8862-53eb2319918d | Ubuntu2004 | active |
+--------------------------------------+------------+--------+

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