Last week, I mentioned an error I was getting, as described below.
I''ve
seen several mailing list posts describing a similar problem as far
back as December, 2005. This seems to be a problem plaguing all Xen 3
releases (to date).>
> 3. After booting and then destroying approximately 25 domains, the
> system will require a reboot before I can add further domains. The
> error I receive is (approximately) ''(vif) could not be
connected''. If
> I comment the ''vif='' line in the domain''s
configuration, I then
> receive ''(vbd) could not be connected''. Both messages
were also
> followed by "Hotplug scripts not working." I suspect if I
restart
> xenstored, this may be fixed, but I haven''t yet had a chance to
test
> that.
Upon further review, I think my problem is happening once two domains
are started that have the same mac address assigned to their vif
devices. When a second domain comes online with the same MAC address as
an existing domain, Xen will not be able to create the vif, and exits --
but it does NOT properly clean up. After that point, Xen will refuse to
create even properly-configured domains. No domains may be created from
that point forward, until a reboot. I haven''t yet found a workaround.
Once the system has encountered this problem, I see several variables
within xenstore-ls associated with each of the domains which failed to
''create''. I manually removed the associated variable trees
with
xenstore-rm, but I still wasn''t able to create a new domain, again with
the message "(vdb) could not be connected".
Please let me know if you need further information to reproduce the
error.. ;-)
Below is an excerpt from xenstore-ls showing information about a domain
(rjackson) which was never created.. (I attempted to start it a few
times, as you can see)
Thank you.
--
Eric Windisch
> local = ""
> domain = ""
> 0 = ""
> cpu = ""
> 0 = ""
> availability = "online"
> 1 = ""
> availability = "online"
> memory = ""
> target = "1896448"
> name = "Domain-0"
> console = ""
> limit = "1048576"
> vm = "/vm/00000000-0000-0000-0000-000000000000"
> domid = "0"
> backend = ""
> vbd = ""
> 23 = ""
> 2049 = ""
> domain = "rjackson"
> frontend = "/local/domain/23/device/vbd/2049"
> dev = "sda1"
> state = "5"
> params = "mapper/XenDomains-rjackson"
> mode = "w"
> frontend-id = "23"
> type = "phy"
> 2050 = ""
> domain = "rjackson"
> frontend = "/local/domain/23/device/vbd/2050"
> dev = "sda2"
> state = "1"
> params = "mapper/Swap-rjackson"
> mode = "w"
> frontend-id = "23"
> type = "phy"
> 24 = ""
> 2049 = ""
> domain = "rjackson"
> frontend = "/local/domain/24/device/vbd/2049"
> dev = "sda1"
> state = "5"
> params = "mapper/XenDomains-rjackson"
> mode = "w"
> frontend-id = "24"
> type = "phy"
> 2050 = ""
> domain = "rjackson"
> frontend = "/local/domain/24/device/vbd/2050"
> dev = "sda2"
> state = "1"
> params = "mapper/Swap-rjackson"
> mode = "w"
> frontend-id = "24"
> type = "phy"
> 25 = ""
> 2049 = ""
> domain = "rjackson"
> frontend = "/local/domain/25/device/vbd/2049"
> dev = "sda1"
> state = "5"
> params = "mapper/XenDomains-rjackson"
> mode = "w"
> frontend-id = "25"
> type = "phy"
> 2050 = ""
> domain = "rjackson"
> frontend = "/local/domain/25/device/vbd/2050"
> dev = "sda2"
> state = "1"
> params = "mapper/Swap-rjackson"
> mode = "w"
> frontend-id = "25"
> type = "phy"
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