virt-v2v-output-openstack(1)

НАЗВА
virt-v2v-output-openstack - Using virt-v2v to convert guests to OpenStack

КОРОТКИЙ ОПИС
 virt-v2v [-i* options] -o openstack
                        -oo server-id=SERVER
                        [-oo guest-id=GUEST]
                        [-oo verify-server-certificate=false]
                        [-oo os-username=admin] [-oo os-*=*]

 virt-v2v [-i* options] -o glance

ОПИС
This page documents how to use virt-v2v(1) to convert guests to run on OpenStack. There are two output modes you can select, but only -o openstack should be used normally.

-o openstack -oo server-id=SERVER [...]
    Full description: "OUTPUT TO OPENSTACK"

    This is the modern method for uploading to OpenStack via the REST API. Guests can be directly converted into Cinder volumes.

-o glance
    Full description: "OUTPUT TO GLANCE"

    This is the old method for uploading to Glance. Unfortunately Glance is not well suited to storing converted guests (since virt-v2v deals with "pets" not templated "cattle"), so this method is not recommended unless you really know what you are doing.

OUTPUT TO OPENSTACK
To output to OpenStack, use the -o openstack option.

  OpenStack: Setting up a conversion appliance
When virt-v2v is converting to OpenStack, it is unusual in that virt-v2v must be running inside a virtual machine running on top of the OpenStack overcloud. This virtual machine is called the "conversion appliance". Note this virtual machine is unrelated to the guest which is being converted.

The reason for this is because to create Cinder volumes that will contain the guest data (for the converted guest) we must attach those Cinder volumes to an OpenStack virtual machine.

The "openstack" command must be installed in the appliance. We use it for communicating with OpenStack.

When virt-v2v is running in the conversion appliance, you must supply the name or UUID of the conversion appliance to virt-v2v, eg:

 $ openstack server list
 +--------------------------------------+-----------+--------+
 | ID                                   | Name      | Status |
 +--------------------------------------+-----------+--------+
 | bbb0147a-44b9-4d19-9a9d-10ca9a984744 | test1     | ACTIVE |
 +--------------------------------------+-----------+--------+

 # virt-v2v [...] \
       -o openstack -oo server-id=bbb0147a-44b9-4d19-9a9d-10ca9a984744

або:

 # virt-v2v [...] -o openstack -oo server-id=test1

You can run many parallel conversions inside a single conversion appliance if you want, subject to having enough resources available. However OpenStack itself imposes a limit that you should be aware of: OpenStack cannot attach more than around 25 disks [the exact number varies with configuration] to a single appliance, and that limits the number of guests which can be converted in parallel, because each guest's disk must be attached to the appliance while being copied.

  OpenStack: Authentication
Converting to OpenStack requires access to the tenant (non-admin) API endpoints. You will need to either set up your "$OS_*" environment variables or use output options on the virt-v2v command line to authenticate with OpenStack.

Normally there is a file called "overcloudrc" or "keystonerc_admin" which you can simply "source" to set everything up.

Приклад:

 export OS_USERNAME=admin

або:

 virt-v2v [...] -o openstack -oo os-username=admin

are equivalent, and have the same effect as using --os-username on the command line of OpenStack tools.

  OpenStack: Running as root
Because virt-v2v must access Cinder volumes which are presented as /dev devices to the conversion appliance, virt-v2v must usually run as root in -o openstack mode.

If you use "sudo" to start virt-v2v and you are using environment variables for authentication, remember to use the "sudo -E" option to preserve the environment.

  OpenStack: Guest ID
 virt-v2v [...] -o openstack -oo guest-id=123-456-7890

You may optionally specify -oo guest-id=... on the command line. The ID (which can be any string) is saved on each Cinder volume in the "virt_v2v_guest_id" volume property.

This can be used to find disks associated with a guest, or to associate which disks are related to which guests when converting many guests.

  OpenStack: Ignore server certificate
Using -oo verify-server-certificate=false you can tell the openstack client to ignore the server certificate when connecting to the OpenStack API endpoints. This has the same effect as passing the --insecure option to the "openstack" command.

  OpenStack: Converting a guest
The final command to convert the guest, running as root, will be:

 # virt-v2v [-i options ...] \
       -o openstack -oo server-id=NAME|UUID [-oo guest-id=ID]

If you include authentication options on the command line then:

 # virt-v2v [-i options ...] \
       -o openstack -oo server-id=NAME|UUID -oo os-username=admin [etc]

  OpenStack: Booting the guest
Guests are converted as Cinder volume(s) (one volume per disk in the original guest). To boot them use the "openstack server create --volume" option:

 $ openstack volume list
 +--------------------------------------+---------------+-----------+
 | ID                                   | Name          | Status    |
 +--------------------------------------+---------------+-----------+
 | c4d06d15-22ef-462e-9eff-ab54ab285a1f | fedora-27-sda | available |
 +--------------------------------------+---------------+-----------+
 $ openstack server create \
       --flavor x1.small \
       --volume c4d06d15-22ef-462e-9eff-ab54ab285a1f \
       myguest
 $ openstack console url show myguest

  OpenStack: Other conversion options
To specify the Cinder volume type, use -os. If not specified then no Cinder volume type is used.

The following options are not supported with OpenStack: -oa, -of.

ВИВЕДЕННЯ ДО GLANCE
Note this is a legacy option. In most cases you should use "OUTPUT TO OPENSTACK" instead.

Щоб вивести дані до OpenStack Glance, скористайтеся параметром -o glance.

This runs the glance(1) CLI program which must be installed on the virt-v2v conversion host. For authentication to work, you will need to set "OS_*" environment variables.

Normally there is a file called "overcloudrc" or "keystonerc_admin" which you can simply "source" to set everything up.

Virt-v2v додає метадані щодо гостьової системи до Glance, описуючи такі речі, як назва гостьової операційної системи і список потрібних їй драйверів. Команда "glance image-show" покаже метадані як поля «Property», зокрема "os_type" і "hw_disk_bus".

  Glance і розрідженість
Засоби вивантаження образів до Glance неправильно працюють із розрідженістю. З цієї причини, використання qcow2 буде швидшим і потребуватиме менше місця на сервері Glance. Скористайтеся параметром virt-v2v -of qcow2.

  Glance і робота з декількома дисками
Якщо у гостьовій системі єдиний диск, назва цього диску у Glance буде назвою гостьової системи. Керувати назвою можна за допомогою параметра -on.

Glance doesn't have a concept of associating multiple disks with a single guest, and Nova doesn't allow you to boot a guest from multiple Glance disks either. If the guest has multiple disks, then the first (assumed to be the system disk) will have the name of the guest, and the second and subsequent data disks will be called "guestname-disk2", "guestname-disk3" etc. It may be best to leave the system disk in Glance, and import the data disks to Cinder.

ТАКОЖ ПЕРЕГЛЯНЬТЕ
virt-v2v(1), https://docs.openstack.org/python-openstackclient/latest/cli/man/openstack.html, glance(1).

АВТОР
Richard W.M. Jones

АВТОРСЬКІ ПРАВА
Copyright (C) 2009-2020 Red Hat Inc.

LICENSE

BUGS
To get a list of bugs against libguestfs, use this link: https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools

To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools

When reporting a bug, please supply:

•   The version of libguestfs.

•   Where you got libguestfs (eg. which Linux distro, compiled from source, etc)

•   Describe the bug accurately and give a way to reproduce it.

•   Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report.