使用 ubuntu 15.10，我只是尝试使用 kvm 创建虚拟机并按照网络上的一些说明进行操作，但没有成功。运行时似乎失败并出现mkfs.ext4以下错误：The file /dev/mapper/loop0p1 does not exist and no size was specified.
我已经安装了这些：
sudo apt-get install qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils virt-manager
命令
ubuntu-vm-builder kvm trusty \
--domain newvm \
--dest newvm \
--arch i386 \
--hostname hostnameformyvm \
--mem 256 \
--user john \
--pass doe \
--bridge br0 \
--dns 8.8.8.8 \
--mirror http://us.archive.ubuntu.com/ubuntu \
--components main,universe \
--addpkg acpid \
--addpkg vim \
--addpkg openssh-server \
--libvirt qemu:///system ;
输出
2016-02-05 13:04:27,082 INFO : logging to file: /tmp/tmpODnkhw
2016-02-05 13:04:27,161 INFO : Calling hook: preflight_check
2016-02-05 13:04:27,164 INFO : Calling hook: set_defaults
2016-02-05 13:04:27,165 INFO : Calling hook: bootstrap
2016-02-05 13:09:00,044 INFO : Calling hook: configure_os
Extracting templates from packages: 100%
2016-02-05 13:09:58,368 INFO : invoke-rc.d: policy-rc.d denied execution of start.
2016-02-05 13:09:59,776 INFO : Creating SSH2 RSA key; this may take some time ...
2016-02-05 13:10:00,332 INFO : Creating SSH2 DSA key; this may take some time ...
2016-02-05 13:10:00,338 INFO : Creating SSH2 ECDSA key; this may take some time ...
2016-02-05 13:10:00,352 INFO : Creating SSH2 ED25519 key; this may take some time ...
2016-02-05 13:10:01,404 INFO : invoke-rc.d: policy-rc.d denied execution of start.
2016-02-05 13:10:13,530 INFO :
2016-02-05 13:10:13,531 INFO : Current default time zone: 'Etc/UTC'
2016-02-05 13:10:13,533 INFO : Local time is now: Fri Feb 5 18:10:13 UTC 2016.
2016-02-05 13:10:13,534 INFO : Universal Time is now: Fri Feb 5 18:10:13 UTC 2016.
2016-02-05 13:10:13,534 INFO :
Extracting templates from packages: 100%
2016-02-05 13:10:53,208 INFO :
2016-02-05 13:10:53,208 INFO : Current default time zone: 'Etc/UTC'
2016-02-05 13:10:53,210 INFO : Local time is now: Fri Feb 5 18:10:53 UTC 2016.
2016-02-05 13:10:53,212 INFO : Universal Time is now: Fri Feb 5 18:10:53 UTC 2016.
2016-02-05 13:10:53,212 INFO : Run 'dpkg-reconfigure tzdata' if you wish to change it.
2016-02-05 13:10:53,212 INFO :
2016-02-05 13:10:56,277 INFO : invoke-rc.d: policy-rc.d denied execution of stop.
2016-02-05 13:11:47,834 INFO : invoke-rc.d: policy-rc.d denied execution of stop.
2016-02-05 13:11:51,507 INFO : invoke-rc.d: policy-rc.d denied execution of start.
2016-02-05 13:11:52,909 INFO : invoke-rc.d: policy-rc.d denied execution of restart.
2016-02-05 13:12:01,982 INFO : invoke-rc.d: policy-rc.d denied execution of start.
2016-02-05 13:12:05,980 INFO : invoke-rc.d: policy-rc.d denied execution of restart.
2016-02-05 13:12:20,074 INFO : Cleaning up
2016-02-05 13:12:20,085 INFO : Calling hook: preflight_check
2016-02-05 13:12:20,609 INFO : Calling hook: configure_networking
2016-02-05 13:12:20,656 INFO : Calling hook: configure_mounting
2016-02-05 13:12:20,665 INFO : Calling hook: mount_partitions
2016-02-05 13:12:20,665 INFO : Mounting target filesystems
2016-02-05 13:12:20,665 INFO : Creating disk image: "/tmp/tmpMijS7P" of size: 5120MB
2016-02-05 13:12:20,956 INFO : Adding partition table to disk image: /tmp/tmpMijS7P
2016-02-05 13:12:21,104 INFO : Adding type 4 partition to disk image: /tmp/tmpMijS7P
2016-02-05 13:12:21,104 INFO : Partition at beginning of disk - reserving first cylinder
2016-02-05 13:12:21,111 INFO : Warning: The resulting partition is not properly aligned for best performance.
2016-02-05 13:12:21,164 INFO : Adding type 3 partition to disk image: /tmp/tmpMijS7P
2016-02-05 13:12:21,171 INFO : [0] ../../libparted/filesys.c:148 (ped_file_system_type_get): File system alias linux-swap(new) is deprecated
2016-02-05 13:12:21,205 INFO : Creating loop devices corresponding to the created partitions
2016-02-05 13:12:21,306 INFO : Creating file systems
2016-02-05 13:12:21,365 INFO : mke2fs 1.42.12 (29-Aug-2014)
2016-02-05 13:12:21,365 INFO : The file /dev/mapper/loop0p1 does not exist and no size was specified.
2016-02-05 13:12:21,367 INFO : Cleaning up
2016-02-05 13:12:24,493 ERROR : Process (['mkfs.ext4', '-F', '/dev/mapper/loop0p1']) returned 1. stdout: , stderr: mke2fs 1.42.12 (29-Aug-2014)
The file /dev/mapper/loop0p1 does not exist and no size was specified.
Traceback (most recent call last):
File "/usr/bin/ubuntu-vm-builder", line 24, in <module>
uvb.main()
File "/usr/lib/python2.7/dist-packages/VMBuilder/contrib/cli.py", line 228, in main
hypervisor.install_os()
File "/usr/lib/python2.7/dist-packages/VMBuilder/hypervisor.py", line 65, in install_os
self.call_hooks('mount_partitions', self.chroot_dir)
File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 67, in call_hooks
call_hooks(self, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 170, in call_hooks
getattr(context, func)(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/VMBuilder/hypervisor.py", line 91, in mount_partitions
disk.mkfs()
File "/usr/lib/python2.7/dist-packages/VMBuilder/disk.py", line 151, in mkfs
part.mkfs()
File "/usr/lib/python2.7/dist-packages/VMBuilder/disk.py", line 306, in mkfs
self.fs.mkfs()
File "/usr/lib/python2.7/dist-packages/VMBuilder/disk.py", line 374, in mkfs
run_cmd(*cmd)
File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 120, in run_cmd
raise VMBuilderException, "Process (%s) returned %d. stdout: %s, stderr: %s" % (args.__repr__(), status, mystdout.buf, mystderr.buf)
VMBuilder.exception.VMBuilderException: Process (['mkfs.ext4', '-F', '/dev/mapper/loop0p1']) returned 1. stdout: , stderr: mke2fs 1.42.12 (29-Aug-2014)
The file /dev/mapper/loop0p1 does not exist and no size was specified.
我知道我的 CPU 支持虚拟化：
$ sudo kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used
答案1
这与此相关这个错误，并提交了修复，并在错误描述中提供了解决方法。要解决此问题，请编辑 disk.py 文件。
sudo nano /usr/lib/python2.7/dist-packages/VMBuilder/disk.py
找到 map_partitions 方法，并在其末尾添加“time.sleep(3)”。相关部分应该如下所示：
for (part, mapdev) in zip(self.partitions, mapdevs):
part.set_filename('/dev/mapper/%s' % mapdev)
time.sleep(3)
def mkfs(self):
请记住，空格在 Python 中是有意义的，因此请确保缩进正确。