Here is a new bug which I faced on virtuozzo 4 and 4.6 for Centos 6 VPS.
VPS fails to add IP during start or networking fails when network is restarted :
-bash-4.1# /etc/init.d/network restart
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: RTNETLINK answers: Operation not supported
Failed to bring up lo.
[FAILED]
Bringing up interface venet0: RTNETLINK answers: Operation not supported
Failed to bring up venet0.
[FAILED]
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
-bash-4.1#
ifconfig shows blank as networking fails to start :
-bash-4.1# ifconfig
-bash-4.1# rpm -q iproute
iproute-2.6.32-31.el6.x86_64
-bash-4.1# cat /etc/redhat-release
CentOS release 6.5 (Final)
-bash-4.1#
Here is the fix, download the rpm’s as per your VPS arch.
for 64-bit systems: http://mirror.centos.org/centos/6.4/os/x86_64/Packages/iproute-2.6.32-23.el6.x86_64.rpm
for 32-bit systems: http://mirror.centos.org/centos/6.4/os/i386/Packages/iproute-2.6.32-23.el6.i686.rpm
Networking is not available in VPS so download it on the Hardware Node :
cd /root/dino
wget http://mirror.centos.org/centos/6.4/os/x86_64/Packages/iproute-2.6.32-23.el6.x86_64.rpm
Copy it to the affected VPS :
cp iproute-2.6.32-23.el6.x86_64.rpm /vz/private/VEID/fs/root/root/
replace VEID with the affected VPS ID.
vzctl enter VEID
-bash-4.1# cd /root/
-bash-4.1# rpm -q iproute
iproute-2.6.32-31.el6.x86_64
-bash-4.1# rpm -e iproute --nodeps
-bash-4.1# rpm -Uvh iproute-2.6.32-23.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:iproute ########################################### [100%]
-bash-4.1# /etc/init.d/network restart
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface venet0: Determining if ip address 127.0.0.1 is already in use for device venet0...
SIOCADDRT: Network is unreachable
SIOCADDRT: Network is unreachable
[ OK ]
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
RTNETLINK answers: File exists
-bash-4.1#
Now you can see the IP’s responding. Please make sure you check the RPM and OS versions:
Parallels KB : http://kb.parallels.com/en/118992
UPDATE :
to avoid updates due to yum append iproute* to exclude line in file /etc/yum.conf