OpenVZ Migration Hostnode Containers from Centos 5 to Centos 6
migrating from an old OpenVZ (Centos 5) to new OpenVZ (Centos 6)
Also if migrating from 32-bit HN to 64-bit your RAM will probably be much bigger than it should be!
16x bigger
eg. 32bit HN:
total used free shared buffers cached
Mem: 256 16 239 0 0 0
-/+ buffers/cache: 16 239
Swap: 0 0 0
eg. 64bit HN with same config:
free -m
total used free shared buffers cached
Mem: 3906 42 3863 0 0 33
-/+ buffers/cache: 9 3897
Swap: 28614 0 28614
Error: required UB parameter swappages not set
vzctl start 27000
Starting container...
Error: required UB parameter swappages not set
Saving VE layout 'simfs' to the VE config file
CT configuration saved to /etc/vz/conf/27000.conf
[root@server18 conf]# vzlist
Container(s) not found
[root@server18 conf]# vzctl start 27000
Starting container...
Error: required UB parameter swappages not set
vzctl set 27000 --swappages 0:unlimited --save
vzctl set 27000 --swappages 0:unlimited --save
CT configuration saved to /etc/vz/conf/27000.conf
[root@server18 conf]# vzctl start 27000
Starting container...
stat(/vz/root/27000): No such file or directory
stat(/vz/root/27000): No such file or directory
stat(/vz/root/27000): No such file or directory
Initializing quota ...
Container is mounted
Adding IP address(es): 98.158.135.57 98.158.135.58
Setting CPU units: 1000
Setting devices
Container start in progress...