What is OpenVZ?
OpenVZ is an operating system-level virtualization technology based on the Linux operating system.OpenVZ allows a physical server to run multiple isolated operating systems called virtual private servers.
What are OpenVZ useful commands?
Command to list the running VPS list
# vzlist
Example:
# vzlist
CTID NPROC STATUS IP_ADDR HOSTNAME
106 104 running xx.xx.xx.xx server1.test.com
107 46 running xx.xx.xx.xx server2.test.com
108 83 running xx.xx.xx.xx server3.test.com
Command to list running and stopped VPSs in a node
# vzlist -a
Example:
# vzlist -a
CTID NPROC STATUS IP_ADDR HOSTNAME
106 104 running xx.xx.xx.xx server1.test1.com
107 46 running xx.xx.xx.xx server2.test2.com
109 86 running xx.xx.xx.xx server4.test4.com
110 – stopped xx.xx.xx.xx server5.test5.com
To start VPS
# vzctl start CTID
Example:
# vzctl start 110
To shut down VPS
# vzctl stop CTID
Example:
# vzctl stop CTID
To view the status of a VPS
# vzctl status CTID
Example:
# vzctl status 110
To enter a VPS
# vzctl enter CTID
Example:
# vzctl enter 106
Entered into CT 106
Set hostname for a Server
# vzctl set CTID –hostname New_hostname –save
Add new IP to VPS
# vzctl set CTID –ipadd xx.xx.xx.xx –save
Delete IP from VPS
# vzctl set CTID –ipdel xx.xx.xx.xx –save
Reset the root password of a VPS
# vzctl set CTID –userpassword root:new_password –save
To add NameServer IPs to VPS
# vzctl set CTID –nameserver xx.xx.xx.xx –save
Delete a container
# vzctl destroy CTID
Suspending a container
# vzctl suspend CTID
Conclusion
Still confused how OpenVZ commands works? Contact Ideastack now.
Frequently Asked Questions
Q1. How do I use OpenVZ?
Import the GPG signing key and add the OpenVZ repository. Install vzquota, ploop, the OpenVZ kernel, and command-line tools. Install vzquota, ploop, the OpenVZ kernel, and the command-line tools. Restart the computer to enable the vzkernel after the packages have been installed.
Q2. Is OpenVZ a container?
For Linux, OpenVZ uses container-based virtualization. OpenVZ produces multiple safe, separated Linux containers (also known as VEs or VPSs) on a single physical server, allowing for more efficient server utilization and preventing application conflicts.
Q3. What are the 3 types of virtualization?
The three main types of server virtualization are full-virtualization, para-virtualization, and OS-level virtualization.