OPENVZ COMMANDS

OpenVZ is an Operating System-level server virtualization solution, built on Linux. OpenVZ creates isolated, secure virtual environments.

FILES

/etc/vz/vz.conf
/etc/vz/conf/veid.conf
/proc/vz/veinfo
/proc/vz/vzquota
/proc/user_beancounters
/proc/fairsched

Log file /var/log/vzctl.log

vzctl Commands

Usage: vzctl [options] [parameters]

Help : vzctl --help


1. stop a VE (start/stop/restart) -

#vzctl stop VEID

2. to stop a VE in fast mode -

#vzctl stop VEID --fast

3. to see all the VE's -

#vzlist -a

4. to enter a VE -

#vzctl enter VEID

5. to see the uptime of a VE - run this from the node -

#vzctl exec VEID uptime

6. to see all the running process in a VE from the node -

#vzctl exec VEID ps aux

7. list the load of each VE -

#for vps in `vzlist -1`; do echo "$vps: `vzctl exec2 $vps uptime`"; done

8. when you think it is a RAM issue (Out Of Memory)-

#less /var/log/messages|grep OOM|grep VEID|wc -l

9. Reinstall a VE - all data will be lost and a fresh install will be there -

#vzctl reinstall VEID

10. number of running VE's in the node - 

#vzlist|grep running|wc -l

11. To find the status of a VC:

#vzctl status VEID

12. You can execute commands inside a VC from the node itself

#vzctl exec VEID COMMAND

13. Check inodevalue

#df -i

14. Set inodevalue

#vzctl set VEID --diskinodes 2000000:2000000 --save

15. Check numiptent value

#egrep numiptent /proc/user_beancounters
numiptent 336 336 2147483647 2147483647 0

16. Set numiptent value

#vzctl set VEID --numiptent 2000000:2000000 --save

17. To permanently remove this VE:

#vzctl destroy VE_ID

Configuration Commands


1) vzctl set VEID –-hostname vps.domain.com -–save : To set the Hostname of a VPS.


2) vzctl set VEID –-ipadd 1.2.3.4 –-save : To add a new IP to the hosting VPS.


3) vzctl set VEID –-ipdel 1.2.3.4 –-save : To delete the IP from VPS.


4) vzctl set VEID –-userpasswd root:new_password -–save : To reset root password of a VPS.


5) vzctl set VEID -–nameserver 1.2.3.4 -–save : To add the nameserver IP’s to the VPS.


6) vzctl exec VEID command : To run any command on a VPS from Node.


7) vzyum VEID install package_name : To install any package/Software on a VPS from Node.