getCapabilities
方法得到一个字符串,用来描述virtualization host
的能力,以及能创建什么样的Guest OS
。请看下面代码:
#!/usr/bin/python
from __future__ import print_function
import sys
import libvirt
conn = libvirt.open('xen:///')
if conn == None:
print('Failed to open connection to xen:///', file=sys.stderr)
exit(1)
caps = conn.getCapabilities() # caps will be a string of XML
print('Capabilities:\n'+caps)
conn.close()
exit(0)
执行如下:
Capabilities:
<capabilities>
<host>
<cpu>
<arch>x86_64</arch>
<features>
<pae/>
</features>
</cpu>
<power_management/>
<migration_features>
<live/>
</migration_features>
<topology>
<cells num='1'>
<cell id='0'>
<memory unit='KiB'>1048512</memory>
<cpus num='0'>
</cpus>
</cell>
</cells>
</topology>
</host>
<guest>
<os_type>xen</os_type>
<arch name='x86_64'>
<wordsize>64</wordsize>
<emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
<machine>xenpv</machine>
<domain type='xen'/>
</arch>
</guest>
<guest>
<os_type>xen</os_type>
<arch name='i686'>
<wordsize>32</wordsize>
<emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
<machine>xenpv</machine>
<domain type='xen'/>
</arch>
<features>
<pae/>
</features>
</guest>
</capabilities>
参考资料:
Capability information。