Update 12.0 to 12.5: IP Addresses gone, ngnix broken

[southy]

Hi all,

I have a CentOS 6 with a Plesk 12.0 just updated to 12.5. It's a VM on a Proxmox host.
Update went alright until I rebooted to see if it survives. Well: It doesn't.
Of my network interfaces, only lo and localhost came up - my two "real" IP addresses didn't.

e.g.: /etc/sysconfig/network-scripts/ifcfg-venet0:0
DEVICE=venet0:0
ONBOOT=yes
IPADDR=x.x.x.x
NETMASK=255.255.255.255

doesn't come up by itself. When I try
> ifconfig venet0:0 up
I get:
> SIOCSIFFLAGS: Cannot assign requested address

Well, clever me tried manually:
> ifconfig venet0:0 x.x.x.x netmask 255.255.255.255 up
and for whatever strange reason: this works.

Now the problem is: SSH works fine, ping works fine and I can directly address apache on DOMAIN.COM:7080
BUT: NGNIX won't start up:

Unable to make action: Unable to manage service by nginxmng: ('start', 'nginx'). Error: [2015-11-14 22:16:56] ERR [util_exec] proc_close() failed ['/usr/local/psa/admin/bin/nginx_control' '--start'] with exit code [1]
Can not start proxy server: /usr/local/psa/admin/sbin/nginx-config execution failed:
nginx: [emerg] bind() to x.x.x.x:80 failed (99: Cannot assign requested address)
nginx: configuration file /etc/nginx/nginx.conf test failed

Can anyone advise how to reapair NGNIX or why the interfaces won't come up?
Or can anyone please tell me how to undo the complete update as everything (including reboots & interfaces up & down) has been perfectly fine until yesterday?

THANKS!

 

[southy]

Found the problem:

I had a third IP address defined for use within Plesk; but I did not assign it within the Proxmox host.
This caused the trouble. Solution: remove third address from Plesk IP management.
Done.
ANother test-reboot will have to wait until another backup is finished, but it should work now.