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Re: [Libvir] Re: [PATCH 1/2] virDomainMigrate implementation (Xen only, no remote, no qemu, no virsh)

Daniel P. Berrange wrote:
On Mon, Jul 16, 2007 at 11:30:33AM -0500, Anthony Liguori wrote:
Richard W.M. Jones wrote:
Anthony Liguori wrote:
For instance, let's say at a university they use an ldap directory to authenticate users and they decide to implement a migration handler that uses that for authentication. They may name this "uni://" and it'll just work. How would they get at this in libvirt without exposing URIs directly?
My latest proposal[1] has a transport parameter (a string) which covers this, in as much as it would allow you to construct URIs which are:

SSH requires:

ssh://[user ]hostname[:port]

So that wouldn't work :-(

Sure it would - rich was just showing simplified syntax - the URI rules/spec allow for a username and we already use this syntax with a username in the remote driver URIs. eg

  $ virsh --connect qemu+ssh://root celery virt boston redhat com/system list --all

Anthony is right that my revised proposal limits the migration to just three parameters: transport, hostname and port.


Perhaps instead we should replace hostname with a URI parameter, understood as either a simple hostname, IP address, a "hostname:port" string [IPv6?], or a full URI. However I feel inevitably this is going to cause hypervisor dependencies to come into libvirt code, which should be avoidable.

Another choice might be to go back to the list of parameters again, and have configurable VIR_MIGRATE_TRANSPORT, VIR_MIGRATE_USERNAME and so on...


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