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ubuntu下kvm 命令行安装64位ubuntu报"Couldn't find hvm kernel for Ubuntu tree."的问题分析

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1.安装ubuntu时使用的virt-install的配置:

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virt- install \
--name test4 \
-- ram 1024 \
--disk path= /data/01_ubuntu/ubuntu4 .img,size=6 \
--vcpus 1 \
--hvm \
--os- type linux \
--network network=default \
--os-variant ubuntuquantal \
--graphics none \
--console pty,target_type=serial \
--location /data/00_osfile/ubuntu-16 .04.1-server-amd64.iso \
--extra-args 'console=ttyS0,115200n8 serial'

报错如下:

ERROR Couldn't find hvm kernel for Ubuntu tree. Domain installation does not appear to have been successful. 。

通过查资料发现,virt-install可以开debug模式的,加入--debug选项即可 。

2.virt-install的debug模式得到的结果:

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[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:268) local hasFile: Couldn't find /var/lib/libvirt/boot/virtinstmnt .xPL9y1 /current/images/MANIFEST
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:89) Fetching URI: /var/lib/libvirt/boot/virtinstmnt .xPL9y1 /install/netboot/version .info
Retrieving file version.info... | 58 B 00:00:00
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:1164) Didn't find any known codename in the URL string
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:511) Detected distro name=Ubuntu osvariant=linux
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:268) local hasFile: Couldn't find /var/lib/libvirt/boot/virtinstmnt .xPL9y1 /install/netboot/ubuntu-installer/i386/linux

这里就可以看出问题了,明明是64位的操作系统,为什么去找./install/netboot/ubuntu-install/i386/linux的路径 。

我们去看看iso文件中正确的路径是什么:

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[root@11.102 01_ubuntu]$ mount /data/00_osfile/ubuntu-16 .04.1-server-amd64.iso /mnt
mount : /dev/loop2 is write-protected, mounting read -only
[root@11.102 01_ubuntu]$ ls /mnt/install/netboot/ubuntu-installer/amd64/linux
/mnt/install/netboot/ubuntu-installer/amd64/linux

基本确定,如果将路径的i386改为amd64,virt-install安装就没有问题.

debug模式剩余的log:

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[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (urlfetcher:320) Cleaning up mount at /var/lib/libvirt/boot/virtinstmnt .xPL9y1
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (cli:305) File "/usr/share/virt-manager/virt-install" , line 1077, in <module>
sys. exit (main())
File "/usr/share/virt-manager/virt-install" , line 1071, in main
start_install(guest, continue_inst, options)
File "/usr/share/virt-manager/virt-install" , line 775, in start_install
fail(e, do_exit=False)
File "/usr/share/virt-manager/virtinst/cli.py" , line 305, in fail
logging.debug( "" . join (traceback.format_stack()))
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] ERROR (cli:306) Couldn't find hvm kernel for Ubuntu tree.
[Wed, 30 Nov 2016 11:16:07 virt- install 26900] DEBUG (cli:308)
Traceback (most recent call last):
File "/usr/share/virt-manager/virt-install" , line 747, in start_install
dom = guest.start_install(meter=meter, noboot=options.noreboot)
File "/usr/share/virt-manager/virtinst/guest.py" , line 491, in start_install
self._prepare_install(meter, dry)
File "/usr/share/virt-manager/virtinst/guest.py" , line 304, in _prepare_install
self.installer.prepare(self, meter)
File "/usr/share/virt-manager/virtinst/installer.py" , line 200, in prepare
self._prepare(guest, meter)
File "/usr/share/virt-manager/virtinst/distroinstaller.py" , line 451, in _prepare
self._prepare_kernel_url(guest, fetcher)
File "/usr/share/virt-manager/virtinst/distroinstaller.py" , line 360, in _prepare_kernel_url
kernel, initrd, args = store.acquireKernel(guest)
File "/usr/share/virt-manager/virtinst/urlfetcher.py" , line 603, in acquireKernel
{ "distro" : self.name, "type" : self. type })
RuntimeError: Couldn't find hvm kernel for Ubuntu tree.

3.修改virt-manager代码:

通过上面的报错,发现virt-manager使用python写的!正好想看什么源码来自,这个正好! 。

通过对virt-manager这一项目一步步debug,找到问题:

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[root@11.102 ~]$ grep -n -A22 "class DebianDistro" /usr/share/virt-manager/virtinst/urlfetcher .py
1076:class DebianDistro(Distro):
1077- # ex. http://ftp.egr.msu.edu/debian/dists/sarge/main/installer-i386/
1078- # daily builds: http://d-i.debian.org/daily-images/amd64/
1079- name = "Debian"
1080- urldistro = "debian"
1081- os_variant = "linux"
1082-
1083- def __init__(self, *args, **kwargs):
1084- Distro.__init__(self, *args, **kwargs)
1085-
1086- # Pull the tree's arch out of the URL text
1087- self._treeArch = 'i386'
1088- for pattern in [ "^.*/installer-(\w+)/?$" ,
1089- "^.*/daily-images/(\w+)/?$" ]:
1090- arch = re.findall(pattern, self.uri)
1091- if arch:
1092- self._treeArch = arch[0]
1093- break
1094-
1095- self._url_prefix = 'current/images'
1096- self._installer_dirname = self.name.lower() + "-installer"
1097- self._set_media_paths()

发现基于Debian的系统,__init__方法中self._treeArch初始化时是i386,估计是virt-manager读取ubuntu的iso文件时,出了什么问题,没读出该系统是x86_64类型,将该值改为amd64,就可以了.

再次运行virt-install,成功进入ubuntu安装界面! 。

附:CentOS命令行使用KVM安装64位ubuntu报"Couldn't find hvm kernel for Ubuntu tree."的解决办法 。

grep -n -A21 'class DebianDistro' /usr/lib/python2.6/site-packages/virtinst/OSDistro.py 命令可以查看DebianDistro类的__init__方法 。

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[root@2 virtinst]$ grep -n -A21 'class DebianDistro' /usr/lib/python2 .6 /site-packages/virtinst/OSDistro .py
892:class DebianDistro(Distro):
893- # ex. http://ftp.egr.msu.edu/debian/dists/sarge/main/installer-i386/
894- # daily builds: http://people.debian.org/~joeyh/d-i/
895-
896- name = "Debian"
897- os_type = "linux"
898-
899- def __init__(self, uri, arch, vmtype=None, scratchdir=None):
900- Distro.__init__(self, uri, arch, vmtype, scratchdir)
901- if uri.count( "installer-i386" ):
902- self._treeArch = "i386"
903- elif uri.count( "installer-amd64" ):
904- self._treeArch = "amd64"
905- else :
906- self._treeArch = "i386"
907-
908- if re.match(r 'i[4-9]86' , arch):
909- self.arch = 'i386'
910-
911- self._installer_name = self.name.lower() + "-" + "installer"
912- self._prefix = 'current/images'
913- self._set_media_paths()

改变__init__方法里的else:条件下面的一行,将"i386"改为"amd64"即可 。

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- self._treeArch = 'i386'
+ self._treeArch = 'amd64'

原文链接:http://www.cnblogs.com/ruo-yu/archive/2016/11/30/6117134.html 。

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