Important openVZ Commands

• VZ Information To list all the running/stopped VPS in the node

vzlist -a

• List all the running VPS in the node it will show only running VPS.

vzlist

• Display the templates present in the server

vzpkgls

• Creating a VPS To create a VPS with VEID 1212 and OStemplate centos-cpanel with vps.basic configuration

vzctl create 1212 --ostemplate centos-cpanel -.config vps.basic

• Deleting a VPS To destroy a VPS with VEID 1212

vzctl destroy 1212

• Configuring VPS (The changes are saved in /etc/vz/conf/<VEID>.conf) To automatically boot when a node is up

vzctl set 1212 --onboot yes --save

• Set hostname

vzctl set 1212 --hostname test1212.my.org --save

• Add an IP address

vzctl set 1212 --ipadd 192.123.192.2 --save

• Delete an IP address

vzctl set 1212 --ipdel 192.123.192.2 --save

• Set the name servers

vzctl set 1212 --nameserver 192.122.12.1 --save

• Set the root password of VPS 1212

vzctl set 1212 --userpasswd root:password

• Set shortname for VPS

vzctl set 1212 --name test1212 --save

• Start/Stop/Restart VPS To start a VPS

vzctl start 1212

vzctl stop 1212

vzctl restart 1212

• Start a disabled VPS

vzctl start 1212 --force

• Stop a VPS

vzctl stop 1212

• Restart a VPS

vzctl restart 1212

• Check the status of a VPS

vzctl status 1212

• Disable a VPS

vzctl set 1212 --disabled yes

• Enable a VPS

vzctl set 1212 --disabled no

• Suspend a VPS

vzctl suspend 1212

• Resume a VPS

vzctl resume 1212

• Run yum update on a VPS

vzyum 1212 -y update

• Install a package using yum on VPS

vzyum 1212 -y install package

• Install a package using rpm on VPS

vzrpm 1212 -ivh package

• Get the details of the VPS like VEID, ClassID, number of processes inside each VPS and the IP addresses of VPS

cat /proc/vz/veinfo

• Enter into a VPS 1212

vzctl enter 1212

• Execute a command in VPS from the hardware node 1212

vzctl exec 1212 command

vzctl exec 1212 df -h

• Managing Disk Quotas To assign disk quotas – First limit is soft limit, second limit is hard limit

vzctl set 1212 --diskspace 10485760 --save  --> for setting 10GB

OR

vzctl set 1212 --diskspace 1048576 --save   --> for setting 1GB

• Assign disk inodes

vzctl set 1212 --diskinodes 90000:91000 --save

• Check the disk quota of a VPS

vzquota stat 1212 -t

• Managing CPU quota To display the available CPU power

vzcpucheck

• Set the number of CPUs available to a VPS

vzctl set 1212 --cpus 2 --save

• Set the minimum and maximum CPU limits

vzctl set 1212 --cpuunits nnnn --cpulimit nn --save

(cpuunits is a an absolute number (fraction of power of the node) and cpulimit is taken as percentage)

• Managing memory quota To display memory usage

vzmemcheck -v

• Set kmem

vzctl set 1212 --kmemsize 2211840:2359296 --save

• Set privvmpages

vzctl set 1212 --privvmpages 2G:2G --save

*Note 1212 is the container or vps id.