virt-df(1) | Virtualization Support | virt-df(1) |
virt-df - 仮想ファイルシステムの使用状況の表示
すべての仮想マシン:
virt-df [--options]
単一の仮想マシン:
virt-df [--options] -d domname virt-df [--options] -a disk.img [-a disk.img ...]
古い形式:
virt-df [--options] domname virt-df [--options] disk.img [disk.img ...]
"virt-df" is a command line tool to display free space on virtual machine filesystems. Unlike other tools, it doesn't just display the size of disk allocated to a virtual machine, but can look inside disk images to see how much space is really being used.
If used without any -a or -d arguments, "virt-df" checks with libvirt to get a list of all active and inactive guests, and performs a "df"-type operation on each one in turn, printing out the results.
If any -a or -d arguments are specified, "virt-df" performs a "df"-type operation on either the single named libvirt domain, or on the disk image(s) listed on the command line (which must all belong to a single VM). In this mode (with arguments), "virt-df" will only work for a single guest. If you want to run on multiple guests, then you have to invoke "virt-df" multiple times.
Use the --csv option to get a format which can be easily parsed by other programs. Other options are similar to the standard df(1) command.
Show disk usage for a single libvirt guest called "F14x64". Make the output human-readable:
# virt-df -d F14x64 -h Filesystem Size Used Available Use% F14x64:/dev/sda1 484M 66M 393M 14% F14x64:/dev/vg_f13x64/lv_root 7.4G 3.4G 4.0G 46%
Show disk usage for a disk image file called test.img:
$ virt-df -a test1.img Filesystem 1K-blocks Used Available Use% test1.img:/dev/sda1 99099 1551 92432 2%
If a single guest has multiple disks, use the -a option repeatedly. A plus sign ("+") is displayed for each additional disk. Note: Do not do this with unrelated guest disks.
$ virt-df -a Win7x32TwoDisks-a -a Win7x32TwoDisks-b Filesystem 1K-blocks Used Available Use% Win7x32TwoDisks-a+:/dev/sda1 102396 24712 77684 25% Win7x32TwoDisks-a+:/dev/sda2 12478460 7403416 5075044 60% Win7x32TwoDisks-a+:/dev/sdb1 521212 55728 465484 11%
ディスクイメージの形式は自動検知されます。 これを上書きして強制的に特定の形式を使用する場合、 --format=.. オプションを使用します。
ゲストのブロックデバイスを直接指定していると((-a))、libvirt は何も使用されません。
例:
virt-df --format=raw -a disk.img
forces raw format (no auto-detection) for disk.img.
virt-df --format=raw -a disk.img --format -a another.img
forces raw format (no auto-detection) for disk.img and reverts to auto-detection for another.img.
仮想マシンのディスクイメージが信頼できない raw 形式である場合、 ディスク形式を指定するためにこのオプションを使用すべきです。 これにより、悪意のある仮想マシンにより起こり得る セキュリティ問題を回避できます (CVE-2010-3851)。
-h と --csv を同時に使用することはできません。
Note that -P 0 means to autodetect, and -P 1 means to use a single thread.
Note that only domains that we fetch from libvirt come with UUIDs. For disk images, we still print the disk image name even when this option is specified.
"virt-df" (and df(1)) get information by issuing a statvfs(3) system call. You can get the same information directly, either from the host (using libguestfs) or inside the guest:
guestfish --ro -d GuestName -i statvfs /
(change / to see stats for other filesystems).
python -c 'import os; s = os.statvfs ("/"); print s'
(change / to see stats for other filesystems).
Comma-separated values (CSV) is a deceptive format. It seems like it should be easy to parse, but it is definitely not easy to parse.
神話: ただコンマで項目を区切る。 真実: これは正しく動き ません。この例は 2 つの列があります:
"foo,bar",baz
神話: 同時にファイルの 1 行を読み込みます。 真実: これは正しく動き ません。この例は 1 つの行があります:
"foo bar",baz
For shell scripts, use "csvtool" (https://github.com/Chris00/ocaml-csv also packaged in major Linux distributions).
For other languages, use a CSV processing library (eg. "Text::CSV" for Perl or Python’s built-in csv library).
Most spreadsheets and databases can import CSV directly.
このプログラムは、成功すると 0 を、エラーがあると 0 以外を返します。
df(1), guestfs(3), guestfish(1), virt-drivers(1), virt-filesystems(1), http://libguestfs.org/.
Richard W.M. Jones http://people.redhat.com/~rjones/
Copyright (C) 2009-2023 Red Hat Inc.
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
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2024-10-03 | guestfs-tools-1.52.2 |