CentOS - May 2017 - {centos 6} errors in libvirtd, all sites down, need advice

Today out of the blue...boom all sites down.

I use a bridge and virtual machines, 5 websites.

virsh shows me all machines are up and running, everything looks okay, 
but cannot get to sites.

Here are the errors listed in the log, condensed due to multiples of 
same errors.

there is some kid or error reading data, then there is some kind of 
network collision (bobnet, no idea what that is)

then it talks of cpus and out of room for data, but tons of room left...

any ideas i would be greatful


thanks

02:07:15.951: 28676: error : virNetSocketReadWire:911 : End of file 
while reading data: Input/output error
17:34:33.924: 2447: error : networkCheckRouteCollision:1673 : internal 
error Network is already in use by interface vbr0
18:03:54.050: 2413: info : libvirt version: 0.9.4, package: 23.el6_2.4 
(CentOS BuildSystem <http://bugs.centos.org>, 2012-01-17-10:52:29, 
c6b18n1.dev.centos.org)
18:03:54.050: 2413: error : virInterfaceDefParseXML:793 : XML error: 
bond interface misses the bond element
18:22:30.393: 2457: error : ifaceGetIndex:334 : internal error interface 
vnet0 does not exist
18:22:30.607: 2457: error : qemuAutostartDomain:165 : Failed to 
autostart VM 'mywebsite': internal error interface vnet0 does not exist
18:25:05.942: 3054: error : ifaceGetIndex:334 : internal error interface 
vnet0 does not exist
18:27:31.022: 3046: error : virNetworkObjIsDuplicate:1742 : operation 
failed: network 'bobnet' already exists with uuid 
85e167f9-4670-4f7c-68c7-caf2daeecc93
18:31:57.184: 3048: error : ifaceGetIndex:334 : internal error interface 
vnet0 does not exist
19:15:24.599: 3043: error : qemuMonitorIO:583 : internal error End of 
file from monitor
00:54:12.418: 7632: warning : qemuDomainObjStart:4649 : Ignoring 
incomplete managed state /var/lib/libvirt/qemu/save/mywebsite.save
11:51:27.639: 2157: error : qemuDomainSaveImageOpen:3914 : operation 
failed: failed to read qemu header
2014-03-24 19:03:00.182+0000: 2047: error : qemuDomainSetVcpusFlags:4245 
: invalid argument: requested vcpus is greater than max allowable vcpus 
for the domain: 3 > 2
2016-09-07 15:56:13.228+0000: 24704: error : virFileRewrite:507 : cannot 
write data to file '/var/run/libvirt/qemu/main.mywebsite.com.xml.new': 
No space left on device

> Am 29.05.2017 um 22:52 schrieb Political Gateway <politicalgateway at
gmail.com>:
> 
> 2016-09-07 15:56:13.228+0000: 24704: error : virFileRewrite:507 :
> cannot write data to file
'/var/run/libvirt/qemu/main.mywebsite.com.xml.new': No space left on
device
clearly stated - no space left on device.

--
LF