CentOS 7
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OpenStack Newton : Add VM Images
2016/10/22
 
Add Virtual Machine images in Glance.
[1] For example, Create a Virtual Machine image of CentOS 7.
# create a directory for disk image

[root@dlp ~(keystone)]#
mkdir -p /var/kvm/images
# create a disk image

[root@dlp ~(keystone)]#
qemu-img create -f qcow2 /var/kvm/images/centos7.img 10G
# install

[root@dlp ~(keystone)]#
virt-install \
--name centos7 \
--ram 2048 \
--disk path=/var/kvm/images/centos7.img,format=qcow2 \
--vcpus 2 \
--os-type linux \
--os-variant rhel7 \
--graphics none \
--console pty,target_type=serial \
--location 'http://ftp.iij.ad.jp/pub/linux/centos/7/os/x86_64/' \
--extra-args 'console=ttyS0,115200n8 serial'
Starting install...    
# installation starts
[2]
After installation, change settings in virtual machine like follows and shutdown it.
* delete or comment out the line "HWADDR" and "UUID" in /etc/sysconfig/network-scripts/ifcfg-eth0
* set "dhcp" for "BOOTPROTO" in /etc/sysconfig/network-scripts/ifcfg-eth0
[3] Add the virtual image to Glance.
[root@dlp ~(keystone)]#
glance image-create --name "CentOS7" --file /var/kvm/images/centos7.img --disk-format qcow2 --container-format bare --visibility public

+------------------+--------------------------------------+
| Property         | Value                                |
+------------------+--------------------------------------+
| checksum         | 1fc0c3cc0f3e581fd046e7a64fe974ff     |
| container_format | bare                                 |
| created_at       | 2016-10-21T17:21:44Z                 |
| disk_format      | qcow2                                |
| id               | 6afd28b3-6056-4c30-bd47-93fb26cc5062 |
| min_disk         | 0                                    |
| min_ram          | 0                                    |
| name             | CentOS7                              |
| owner            | 150e205a8791426e8028a94699fb8848     |
| protected        | False                                |
| size             | 1101660160                           |
| status           | active                               |
| tags             | []                                   |
| updated_at       | 2016-10-21T17:21:49Z                 |
| virtual_size     | None                                 |
| visibility       | public                               |
+------------------+--------------------------------------+

[root@dlp ~(keystone)]#
glance image-list

+--------------------------------------+---------+
| ID                                   | Name    |
+--------------------------------------+---------+
| 6afd28b3-6056-4c30-bd47-93fb26cc5062 | CentOS7 |
+--------------------------------------+---------+
[4] By the way, if you got an image from internet, it's OK to simply add it like follows.
[root@dlp ~(keystone)]#
wget http://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img -P /var/kvm/images
[root@dlp ~(keystone)]#
glance image-create --name "Ubuntu1604" --file /var/kvm/images/ubuntu-16.04-server-cloudimg-amd64-disk1.img --disk-format qcow2 --container-format bare --visibility public

+------------------+--------------------------------------+
| Property         | Value                                |
+------------------+--------------------------------------+
| checksum         | 3dc12c0950321bb114279959ffb239d8     |
| container_format | bare                                 |
| created_at       | 2016-10-21T17:23:57Z                 |
| disk_format      | qcow2                                |
| id               | 1f9224fa-63ca-475a-b595-3ad87dd900ad |
| min_disk         | 0                                    |
| min_ram          | 0                                    |
| name             | Ubuntu1604                           |
| owner            | 150e205a8791426e8028a94699fb8848     |
| protected        | False                                |
| size             | 313851904                            |
| status           | active                               |
| tags             | []                                   |
| updated_at       | 2016-10-21T17:23:58Z                 |
| virtual_size     | None                                 |
| visibility       | public                               |
+------------------+--------------------------------------+
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