Hi all,
I had installed RHEL 5 x86_64 with virtualization right off the bat.
Everything ran beautifully with two Xen guests (also RHEL 5.) All 3 IPs
(host and 2 guests) were in the same subnet.
Then I had to change all the IP addresses to a different subnet (but
again all 3 within the same subnet - trying to stay away from 802.1q
stuff)... so I modified each guest's /etc/hosts, etc/sysconfig/network,
etc/sysconfig/network-scripts/ifcfg-eth0 and then shutdown both guests.
Then modified the configs on the host and rebooted.
When it boots now it seems like it's fine but there is no network
connectivity and the default route is pointing to the virbr0 interface!!
ifconfig shows eth0 but without an IP address
If I do a 'service network restart' then everything works fine again,
eth0 has the correct IP and the default route is in place. At that
point everything seems fine with the exception of:
I get this every two minutes now:
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: warning : Failed to find the network: Is the daemon running ?
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: warning : Failed to find a node driver: Is the libvirtd daemon
running ?
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: warning : Failed to find the network: Is the daemon running ?
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: Remote error : unable to connect to
'/var/run/libvirt/libvirt-sock': Connection refused
libvir: warning : Failed to find a node driver: Is the libvirtd daemon
running ?
virt-manager seems to work fine and lists my dom0 and my two xens which
also seem to be working just fine. virsh also seems to have no issues
showing my xens:
virsh list
Id Name State
----------------------------------
0 Domain-0 running
1 jhsympa1 idle
2 jhsympa2 idle
xm list also shows no issues:
xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 30050 8 r----- 2596.2
jhsympa1 1 1023 1 -b---- 159.7
jhsympa2 2 1023 1 -b---- 4125.3
'service libvirtd status' shows:
libvirtd dead but subsys locked
dmesg doesn't show anything that sticks out other than the fact that
eth0 and eth1 seem to be pronounced to be DOWN, then UP, then DOWN, then
UP, then DOWN then UP again and again in a time span of a few seconds as
different modules start to act - mDNS, xend, bnx iSCSI support,
whatever. But when I compared that to the logs prior to the IP change,
they're the same.
I do notice that when I launch virt-manager there is nothing listed in
the 'virtual network' tab - it's all greyed out.
SELinux is disabled. I can't find anything in any configs pertaining to
xen or libvirt that are IP related.
I know if this server is rebooted for any reason I'm going to need to do
a 'service network restart' before connectivity to/from the guests will
work and that's not a good thing!
another error I noticed is:
virsh net-list --all
error: Failed to list active networks
error: this function is not supported by the hypervisor:
virConnectNumOfNetworks
whereas xm gives me this:
#xm network-list Domain-0 comes back with nothing
#xm network-list jhsympa1
Idx BE MAC Addr. handle state evt-ch tx-/rx-ring-ref BE-path
0 0 00:16:36:32:6e:39 0 4 8 768 /57
/local/domain/0/backend/vif/1/0
# xm network-list jhsympa2
Idx BE MAC Addr. handle state evt-ch tx-/rx-ring-ref BE-path
0 0 00:16:36:7b:f3:14 0 4 8 769 /768
/local/domain/0/backend/vif/2/0
MORE INFO:
#brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.000000000000 yes
xenbr0 8000.feffffffffff no vif2.0
vif1.0
peth0
vif0.0
This appears correct as far as I can tell
Where am I to fix this weirdness? Changing IPs shouldn't involve all of
this! Especially when I'm only changing eth0 (eth1 is not configured)
and they are all in the same subnet as before and nothing else was modified.
These guests are about to be put into production and I only have a few
days to make changes.
Any help would be awesome!
Thanks
--
Denny Snyder
Systems Engineer
IT@Johns Hopkins
5801 Smith Ave Suite 3110C
Baltimore, MD 21209
(410) 735-7613: DESK
(410) 735-4660: FAX
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