Fedora 19
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Virt Tools
2013/07/03
 
Install useful tools for virt management.
[1] Install virt tools.
[root@dlp ~]#
yum -y install libguestfs-tools virt-top
[2] "ls" a directory in a virtual machine
[root@dlp ~]#
virt-ls -l -d www /root

total 48
dr-xr-x---.  3 root root 4096 Jul  2 20:28 .
dr-xr-xr-x. 18 root root 4096 Jul  2 20:28 ..
-rw-------.  1 root root  711 Jul  2 22:24 .bash_history
-rw-r--r--.  1 root root   18 Feb 18 12:13 .bash_logout
-rw-r--r--.  1 root root  176 Feb 18 12:13 .bash_profile
-rw-r--r--.  1 root root  176 Feb 18 12:13 .bashrc
...
[3] "cat" a file in a virtual machine
[root@dlp ~]#
virt-cat -d www /etc/passwd

root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
...
[4] Edit a file in a virtual machine
[root@dlp ~]#
virt-edit -d www /etc/fstab

#
# /etc/fstab
# Created by anaconda on Tue Jul  2 11:15:36 2013
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/fedora-root /                       ext4    defaults        1 1
UUID=3798559f-12f9-46d3-88d0-e78d7548463e /boot                   ext4    defaults        1 2
/dev/mapper/fedora-swap swap                    swap    defaults        0 0
[5] Display disk usage in a virtual machine
[root@dlp ~]#
virt-df -d www

Filesystem                           1K-blocks       Used  Available  Use%
www:/dev/sda1                           487652      78425     383627   17%
www:/dev/fedora/root                  28244124    3480080   23322664   13%
[6] Mount a disk for a virtual machine
[root@dlp ~]#
guestmount -d www -i /media

[root@dlp ~]#
ll /media

total 82
lrwxrwxrwx.   1 root root     7 Jul  2 20:26 bin -> usr/bin
dr-xr-xr-x.   4 root root  1024 Jul  2 20:26 boot
drwxr-xr-x.   2 root root  4096 Jul  2 20:15 dev
drwxr-xr-x. 135 root root 12288 Jul  2 22:10 etc
...
[7] Display the status of virtual machines
[root@dlp ~]#
virt-top

virt-top 23:02:15 - x86_64 12/12CPU 1600MHz 24105MB
3 domains, 1 active, 1 running, 0 sleeping, 0 paused, 2 inactive D:0 O:0 X:0
CPU: 0.0%  Mem: 2048 MB (2048 MB by guests)

   ID S RDRQ WRRQ RXBY TXBY %CPU %MEM    TIME   NAME
   19 R    0    0    0    0  0.0  8.0   0:12.86 www
    -                                           (template)
    -                                           (win7)
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