Daniel P. Berrange
2007-Apr-12 00:51 UTC
[Xen-devel] XenD lost its uniqueness check for names & UUIDs
I''m doing some testing against today''s xen-unstable.hg and it
appears that
XenD has lost its uniqueness checks for names & UUIDs. eg
# xm create XenGuest2
Using config file "/etc/xen/XenGuest2".
Started domain XenGuest2
# xm create XenGuest2
Using config file "/etc/xen/XenGuest2".
Started domain XenGuest2
# xm create XenGuest2
Using config file "/etc/xen/XenGuest2".
Started domain XenGuest2
# xm list
Name ID Mem VCPUs State Time(s)
Domain-0 0 698 2 r----- 2915.3
XenGuest1 24 394 4 -b---- 32.0
XenGuest2 32 300 1 r----- 0.3
XenGuest2 30 300 1 ------ 3.2
XenGuest2 31 300 1 --p--- 0.0
# xm list --long | grep uuid | sort | uniq -c
1 (uuid 00000000-0000-0000-0000-000000000000)
1 (uuid c7a5fdb0-cdaf-9455-926a-d65c16db1809)
3 (uuid c7a5fdb2-cdaf-9455-926a-d65c16db1809)
So I now have 3 active guests with same name and same UUID :-(
Now it should always be possible to run ''xm new'' to define a
persistent
config file for a transient domain, but, attempts to run ''xm
create''
should be rejected if there is an existing domain.
Dan.
--
|=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=|
|=- Perl modules: http://search.cpan.org/~danberr/ -=|
|=- Projects: http://freshmeat.net/~danielpb/ -=|
|=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel
Daniel P. Berrange
2007-Apr-12 01:27 UTC
Re: [Xen-devel] XenD lost its uniqueness check for names & UUIDs
On Thu, Apr 12, 2007 at 01:51:17AM +0100, Daniel P. Berrange wrote:> I''m doing some testing against today''s xen-unstable.hg and it appears that > XenD has lost its uniqueness checks for names & UUIDs. eg > > # xm create XenGuest2 > Using config file "/etc/xen/XenGuest2". > Started domain XenGuest2 > # xm create XenGuest2 > Using config file "/etc/xen/XenGuest2". > Started domain XenGuest2 > # xm create XenGuest2 > Using config file "/etc/xen/XenGuest2". > Started domain XenGuest2 > # xm list > Name ID Mem VCPUs State Time(s) > Domain-0 0 698 2 r----- 2915.3 > XenGuest1 24 394 4 -b---- 32.0 > XenGuest2 32 300 1 r----- 0.3 > XenGuest2 30 300 1 ------ 3.2 > XenGuest2 31 300 1 --p--- 0.0 > > # xm list --long | grep uuid | sort | uniq -c > 1 (uuid 00000000-0000-0000-0000-000000000000) > 1 (uuid c7a5fdb0-cdaf-9455-926a-d65c16db1809) > 3 (uuid c7a5fdb2-cdaf-9455-926a-d65c16db1809) > > So I now have 3 active guests with same name and same UUID :-( > > Now it should always be possible to run ''xm new'' to define a persistent > config file for a transient domain, but, attempts to run ''xm create'' > should be rejected if there is an existing domain.This is slightly more interesting than I first thought - there is a name uniqueness check being performed, but it only appears to be done if the UUID''s are different. ie, if I have 2 config files with same name, but different UUIDs, XenD correctly refuses to start the 2nd. If I have 2 config files with same name & same UUID, it happily starts both. Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=| _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel