[libvirt-users] How can I open a libvirt remote connection with ssh

Wangkai (Kevin,C) wangkai86 at huawei.com
Thu Apr 11 09:59:46 UTC 2013



> -----Original Message-----
> From: Daniel P. Berrange [mailto:berrange at redhat.com]
> Sent: Thursday, April 11, 2013 5:55 PM
> To: Wangkai (Kevin,C)
> Cc: libvirt-users at redhat.com
> Subject: Re: [libvirt-users] How can I open a libvirt remote connection
> with ssh
> 
> On Thu, Apr 11, 2013 at 09:45:18AM +0000, Wangkai (Kevin,C) wrote:
> > Hi,
> >
> > When I use 'virConnectOpenAuth' function to connect to
> '192.168.1.102' libvirtd with ssh,
> > Code below,  the screen print the dialog "root at 192.168.1.102's
> password:" ,  and only
> > After I type the password, the connection can be created.
> 
> Libvirt has to spawn an external SSH process for +ssh URIs, so we can't
> hook
> it up into our auth callbacks.

[Wangkai (Kevin,C)] 
Which type of URI can be hooked by auth callback? Qemu+tls?

> 
> > How can I connect to libvirtd with ssh automatically? No need to type
> the password manually.
> 
> You need to setup SSH public keys + SSH agent
[Wangkai (Kevin,C)] 
Maybe I will try this later. 

> 
> >
> > char *au[2] = {"root", "xxxx"};
> > virConnectAuth auth = {
> >                 credTypes,
> >                 sizeof(credTypes) / sizeof(int),
> >                 virConnCb,/* callback function, actually was not be
> called after connect*/
> >                 au /* user and password */
> >             };
> > conn = virConnectOpenAuth("qemu+ssh://192.168.1.102/system", &auth,
> 0);
> 
> virConnectOpenAuth() doesn't do anything useful for '+ssh' URIs.
> 
> There is however a alternative  'libssh2' URI that does use the
> callbacks. eg   qemu+libssh2://hostname/system
> 
> This is less tested & potentially buggy, but it might be ok for your
> needs
> 
> Regards,
> Daniel
> --
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