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Virt-tools
2014/04/23 |
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Install useful tools for virtual machine management.
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| [1] | Install virt tools. |
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root@dlp:~#
apt-get -y install libguestfs-tools virt-top # answer 'Yes' 
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| [2] | "ls" a directory in a virtual machine |
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root@dlp:~# virt-ls -l -d www /root total 24 drwx------ 3 0 0 4096 Apr 23 12:27 . drwxr-xr-x 22 0 0 4096 Apr 22 16:15 .. -rw------- 1 0 0 71 Apr 23 12:36 .bash_history -rw-r--r-- 1 0 0 3106 Feb 20 02:43 .bashrc drwx------ 2 0 0 4096 Apr 23 12:26 .cache -rw-r--r-- 1 0 0 140 Feb 20 02:43 .profile |
| [3] | "cat" a file in a virtual machine |
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root@dlp:~# virt-cat -d www /etc/passwd root:x:0:0:root:/root:/bin/bash daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin bin:x:2:2:bin:/bin:/usr/sbin/nologin sys:x:3:3:sys:/dev:/usr/sbin/nologin sync:x:4:65534:sync:/bin:/bin/sync games:x:5:60:games:/usr/games:/usr/sbin/nologin man:x:6:12:man:/var/cache/man:/usr/sbin/nologin lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin ... |
| [4] | Edit a file in a virtual machine |
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root@dlp:~# virt-edit -d www /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> /dev/mapper/www--vg-root / ext4 errors=remount-ro 0 1 # /boot was on /dev/vda1 during installation UUID=7a2a7f89-272e-4af9-b73c-9d674f5ac99e /boot ext2 defaults 0 2 /dev/mapper/www--vg-swap_1 none swap sw 0 0 |
| [5] | Display disk usage in a virtual machine |
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root@dlp:~# virt-df -d www Filesystem 1K-blocks Used Available Use% www:/dev/sda1 240972 36383 192148 16% www:/dev/www-vg/root 28518268 1028500 26018076 4% |
| [6] | Mount a disk for a virtual machine |
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root@dlp:~# guestmount -d www -i /mnt root@dlp:~# ll /mnt drwxr-xr-x 22 root root 4096 Apr 23 01:15 ./ drwxr-xr-x 22 root root 4096 Apr 18 19:24 ../ drwxr-xr-x 2 root root 4096 Apr 23 01:18 bin/ drwxr-xr-x 4 root root 1024 Apr 23 01:19 boot/ drwxr-xr-x 3 root root 4096 Apr 23 01:13 dev/ ... |
| [7] | Display the status of virtual machines |
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root@dlp:~# virt-top
virt-top 21:51:32 - x86_64 4/4CPU 3301MHz 16042MB
2 domains, 0 active, 0 running, 0 sleeping, 0 paused, 2 inactive D:0 O:0 X:0
CPU: 0.0% Mem: 0 MB (0 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)
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