1virt-v2v-inspector(1)       Virtualization Support       virt-v2v-inspector(1)
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3
4

NAME

6       virt-v2v-inspector - Estimate disk space needed before virt-v2v
7       conversion
8

SYNOPSIS

10        virt-v2v-inspector [-i* options] guest [-O output.xml]
11

DESCRIPTION

13       Virt-v2v-inspector is a companion tool for virt-v2v(1) which can be
14       used before conversion to estimate the number of output disks and disk
15       space that will be required to complete the virt-v2v conversion.  The
16       common use for this is to preallocate target disks on management
17       systems that need this (like Kubevirt).
18
19       This manual page only documents the estimation feature, not all of the
20       -i* options which are the same as virt-v2v.  You should read
21       virt-v2v(1) first.
22
23   Selecting the input guest
24       You can run virt-v2v-inspector with the same -i* options as virt-v2v.
25       (Don't use any -o* options).  This will select the guest that you want
26       to estimate.
27
28       For example to estimate the space required for a guest in a stored
29       local disk called filename.img you could do:
30
31        virt-v2v-inspector -i disk filename.img
32
33   Output
34       The output from this tool is an XML document.
35
36       •   Fields which are annotated with an "estimated='true'" attribute are
37           estimated.  Virt-v2v cannot always know exactly the final size of
38           some things, such as the exact real size of the output disk, since
39           there might be small perturbations between runs.  Estimates are
40           usually very close to the final values.
41
42       •   Numbers representing sizes are always given in bytes.
43
44       •   By default the output is written to stdout.  This is useful when
45           using the program interactively.  However if you want to use this
46           tool from another program it is better to send the output to a
47           specific file using -O output.xml
48
49        <?xml version='1.0' encoding='utf-8'?>
50        <v2v-inspection>
51          <program>virt-v2v-inspector</program>
52          <package>virt-v2v</package>
53          <version>2.1.9</version>
54
55       The <program>, <package> and <version> elements refer to the current
56       version of virt-v2v-inspector and are useful for debugging.  Make sure
57       you use the same version of virt-v2v-inspector and virt-v2v.
58
59          <disks>
60            <disk index='0'>
61              <virtual-size>6442450944</virtual-size>
62              <allocated estimated='true'>1400897536</allocated>
63            </disk>
64            <disk index='1'>
65              <virtual-size>6442450944</virtual-size>
66              <allocated estimated='true'>45131520</allocated>
67            </disk>
68          </disks>
69
70       The <disks> element lists information about each guest disk.  The
71       example virtual machine above has two disks.  <virtual-size> describes
72       the size of the disk as seen from inside the guest, while <allocated>
73       is an estimate of how much storage will be needed on the host after
74       conversion.  This is assuming you use -oa sparse - see the notes below.
75
76          <operatingsystem>
77            <name>linux</name>
78            <distro>fedora</distro>
79            <osinfo>fedora32</osinfo>
80            <arch>x86_64</arch>
81            [...]
82          </operatingsystem>
83
84       The <operatingsystem> element lists information about the guest
85       operating system gleaned during conversion, in a manner similar to the
86       virt-inspector(1) tool from guestfs-tools.
87
88   Output allocation mode and output format
89       Virt-v2v supports selecting the output allocation mode (-oa option) and
90       output format (-of option, eg. -of qcow2).  Since it is difficult to
91       predict the effect of these options on the actual space occupied by the
92       final image this tool does not account for them.
93
94       As a rule of thumb:
95
96       virt-v2v -oa preallocated
97           causes the disk images on the target to consume their full virtual
98           size (excluding the effect of zero allocations will depends so much
99           on the underlying storage that it is often hard even for experts to
100           predict).
101
102       virt-v2v -of qcow2
103           uses the QCOW2 format where supported which means that the apparent
104           size of the file will be equal to its sparse size, but otherwise
105           should not affect estimates very much.
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OPTIONS

108       --help
109           Display help.
110
111       -O output.xml
112           Write the output to a file called output.xml.
113
114       -O -
115           Write the output to stdout.  This is also the default if the -O
116           option is omitted.
117
118       -v
119       --verbose
120           Enable verbose messages for debugging.
121
122       -V
123       --version
124           Display version number and exit.
125
126       -x  Enable tracing of libguestfs API calls.
127
128       -i ...
129       -ic ...
130       -if ...
131       -io ...
132       -ip ...
133       -it ...
134           All of the -i* options supported by virt-v2v and also supported by
135           virt-v2v-inspector.
136
137       -b ...
138       --bridge ...
139       --colors
140       --colours
141       --echo-keys
142       --key ...
143       --keys-from-stdin
144       --mac ...
145       --machine-readable
146       --machine-readable=format
147       -n ...
148       --network ...
149       -q
150       --quiet
151       --root ...
152       --wrap
153           These options work in the same way as the equivalent virt-v2v
154           options.
155

FILES

157       Files used are the same as for virt-v2v.  See "FILES" in virt-v2v(1).
158

ENVIRONMENT VARIABLES

160       Environment variables used are the same as for virt-v2v.  See
161       "ENVIRONMENT VARIABLES" in virt-v2v(1).
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SEE ALSO

164       virt-v2v(1), virt-p2v(1), virt-inspector(1), guestfs(3), guestfish(1),
165       qemu-img(1), nbdkit(1), http://libguestfs.org/.
166

AUTHORS

168       Matthew Booth
169
170       Cédric Bosdonnat
171
172       Laszlo Ersek
173
174       Tomáš Golembiovský
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176       Shahar Havivi
177
178       Richard W.M. Jones
179
180       Roman Kagan
181
182       Mike Latimer
183
184       Nir Soffer
185
186       Pino Toscano
187
188       Xiaodai Wang
189
190       Ming Xie
191
192       Tingting Zheng
193
195       Copyright (C) 2009-2022 Red Hat Inc.
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LICENSE

198       This program is free software; you can redistribute it and/or modify it
199       under the terms of the GNU General Public License as published by the
200       Free Software Foundation; either version 2 of the License, or (at your
201       option) any later version.
202
203       This program is distributed in the hope that it will be useful, but
204       WITHOUT ANY WARRANTY; without even the implied warranty of
205       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
206       General Public License for more details.
207
208       You should have received a copy of the GNU General Public License along
209       with this program; if not, write to the Free Software Foundation, Inc.,
210       51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
211

BUGS

213       To get a list of bugs against libguestfs, use this link:
214       https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
215
216       To report a new bug against libguestfs, use this link:
217       https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
218
219       When reporting a bug, please supply:
220
221       •   The version of libguestfs.
222
223       •   Where you got libguestfs (eg. which Linux distro, compiled from
224           source, etc)
225
226       •   Describe the bug accurately and give a way to reproduce it.
227
228       •   Run libguestfs-test-tool(1) and paste the complete, unedited output
229           into the bug report.
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233virt-v2v-2.3.7                    2023-12-09             virt-v2v-inspector(1)
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