Re: [libvirt] how to adjust the value passed by xml dynamicly
On 07.02.2014 09:06, yue wrote:
hi,all
we can pass value throught xml when start vm. how to adjust the value
dynamicly as needed while vm is running via API calls?
for example , change from
<filterref filter='hcount'>
<parameter name='HC' value='6'/>
<parameter name='HC' value='10'/>
</filterref>
to
<filterref filter='hcount'>
<parameter name='HC' value='16'/>
<parameter name='HC' value='20'/>
</filterref>
i do not want to restart or interrupt the running state of vms(via api,
not command line tools).
These (or any other values) can be changed byt re-defining the domain again:
char *xml = virDomainGetXMLDesc();
/* change the desired values in @xml */
virDomainDefine(conn, xml);
free(xml);
However, this works only on 'config' level - the changes will be applied
the next time domain is started.
For a runtime change, maybe you can use virDomainUpdateDeviceFlags() but
I haven't try if it works with <filterref/>.
Michal