Re: [libvirt] [PATCH] storage pool discovery

Daniel P. Berrange schreef: >On Mon, Aug 04, 2008 at 11:02:33AM +0200, Stefan de Konink wrote: >>On Mon, 4 Aug 2008, Daniel P. Berrange wrote: >> >>>>- - For iSCSI and related stuff everything was relatively easy, because >>>> this would just mean to write the right /dev/blabla to the xenstore. >>>> What is your idea to get different drivers working via: >>>> virt://pool/volume (so basically blktap vs file vs disk) >>>My idea was to have a script in /etc/xen/scripts/ >>Me too, but in order to 'fetch' the actual configuration it is required to >>contact libvirt. And query about the pool/volume location. In this way it >>would be actually a 'redirection' to blktap or adding a devicepath. >> >>So this script is now written in plain C, but I want to know how you >>imagine the driver selection based on connection uri. >You can simply use xen:/// as the URI. There is no need for configurable >URIs since thisis a xen specific script. You don't get the issue. In order to run a specific script for example a block device, it should have an unique prefix. That will make the executable that is called so virt:// will call /etc/xen/scripts/block-virt as script. As you might notice here, the common file://, tap:aio:// or psy:// is not present, so if a pool is file based or device based it should some how inform this 'script' how to redirect the parameters to the appropriate script.