libvirt users - Apr 2018 - Re: how xml generated

hi :
 i create a domain by virt-manager tool, then there is a xxx.xml generated in
/etc/libvirt/qemu/.
so, my question is how the xx.xml generated? What the code involves in libvirt ?

Thanks!



--
Have a good day

On 04/26/2018 04:29 AM, 李卓瑶 wrote:
> hi :
>  i create a domain by virt-manager tool, then there is a xxx.xml generated
in /etc/libvirt/qemu/.
> so, my question is how the xx.xml generated? What the code involves in
libvirt ?
Long story short, virt-manager invokes virt-install which generates XML
string. This string (not yet saved onto disk, still just in memory) is
then passed to libvirt API virDomainDefineXML() which parses it, does
some sanity checking and finally formats it back and save it under
/etc/libvirt/qemu/$domain.xml.

Codewise, you want to be looking at qemuDomainDefineXMLFlags().

Michal

Thanks for your reply
what i want to know is that why there are many devices in $domain.xml, actully ,
i choose nothing in virt-manager?
so, Do i need to look at qemuDomainDefineXMLFlags()?
hours ago, i thought it's qemuDomainCreateWithFlags.


--
 Have a good day



 > -----原始邮件-----
> 发件人: Michal Privoznik <mprivozn@redhat.com>
> 发送时间: 2018年4月26日 星期四
> 收件人: "李卓瑶" <lizhuoyao@hikdata.com>, libvirt-users
<libvirt-users@redhat.com>
> 抄送: shengyizju@163.com
> 主题: Re: [libvirt-users] how xml generated
> 
> On 04/26/2018 04:29 AM, 李卓瑶 wrote:
> > hi :
> >  i create a domain by virt-manager tool, then there is a xxx.xml
generated in /etc/libvirt/qemu/.
> > so, my question is how the xx.xml generated? What the code involves in
libvirt ?
> 
> Long story short, virt-manager invokes virt-install which generates XML
> string. This string (not yet saved onto disk, still just in memory) is
> then passed to libvirt API virDomainDefineXML() which parses it, does
> some sanity checking and finally formats it back and save it under
> /etc/libvirt/qemu/$domain.xml.
> 
> Codewise, you want to be looking at qemuDomainDefineXMLFlags().
> 
> Michal