kali ini GemarOprek akan membahas Perintah dasar OpenVZ, sekedar untuk anda ketahui OpenVZ adalah adalah sebuah platform virtualisasi berbasis Linux dan berdasarkan Linux Kernel. OpenVZ memungkinkan sebuah server fisik untuk menjalankan beberapa contoh sistem operasi terpencil dikenal sebagai kontainer.
OpenVZ hanya dapat menjalankan sistem operasi berbasis linux seperti Centos, Fedora, Gentoo, dan Debian. Salah satu kelemahan dari pengguna OpenVZ tidak dapat melakukan modifikasi kernel.
Semua server virtual harus bergaul dengan versi kernel host berjalan pada. Namun karena tidak memiliki overhead dari hypervisor benar sangat cepat dan efisien melalui KVM, Xen, KVM, VMware dan Cloud.
Namun disini saya akan membahas beberapa perintah yang umum digunakan openvz, yaitu
Perintah dasar OpenVZ
VZ Information To list all the running/stopped VPS in the node
vzlist -a
To list all the running VPS in the node
vzlist
To display the templates present in the server
vzpkgls
Creating a VPS To create a VPS with VEID 101 and ostemplate fedora-core-4 with vps.basic configuration
vzctl create 101 --ostemplate fedora-core-4 -.config vps.basic
Deleting a VPS To destroy a VPS with VEID 101
vzctl destroy 101
Configuring VPS (The changes are saved in /etc/vz/conf/<VEID>.conf) To automatically boot when a node is up
vzctl set 101 --onboot yes --save
To set hostname
vzctl set 101 --hostname test101.my.org --save
To add an IP address
vzctl set 101 --ipadd 10.0.186.1 --save
To delete an IP address
vzctl set 101 --ipdel 10.0.186.1 --save
To set the name servers
vzctl set 101 --nameserver 192.168.1.165 --save
To set the root password of VPS 101
vzctl set 101 --userpasswd root:password
To set shortname for VPS
vzctl set 101 --name test101 --save
Start/Stop/Restart VPS To start a VPS
vzctl start 101
To start a disabled VPS
vzctl start 101 --force
To stop a VPS
vzctl stop 101
To restart a VPS
vzctl restart 101
To know the status of a VPS
vzctl status 101
To 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
To enter into a VPS 101
vzctl enter 101
To execute a command in VPS 101
vzctl exec 101 command --- replace command with the command you need to execute vzctl exec 101 df -h
Managing Disk Quotas To assign disk quotas – First limit is soft limit, second limit is hard limit
vzctl set 101 --diskspace 10485760 --save ==>> for setting 10GB OR vzctl set 101 --diskspace 1048576 --save ==>> for setting 1GB
To assign disk inodes
vzctl set 101 --diskinodes 90000:91000 --save
To check the disk quota of a VPS
vzquota stat 101 -t
Managing CPU quota To display the available CPU power
vzcpucheck
To set the number of CPUs available to a VPS
vzctl set 101 --cpus 2 --save
To set the minimum and maximum CPU limits
vzctl set 101 --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
To set kmem
vzctl set 101 --kmemsize 2211840:2359296 --save
To set privvmpages
vzctl set 101 --privvmpages 2G:2G --save
Other Commands To copy/clone a VPS
vzmlocal -C <source_veid>:<desitnation_veid>
To disable a VPS
vzctl set 101 --disabled yes
To enable a VPS
vzctl set 101 --disabled no
To suspend a VPS
vzctl suspend 101
To resume a VPS
vzctl resume 101
To run yum update on a VPS
vzyum 101 -y update
To install a package using yum on VPS
vzyum 101 -y install package
To install a package using rpm on VPS
vzrpm 101 -ivh package
atau anda dapat melihat dokumentasi lengkap Perintah dasar OpenVZ pada link ini http://download.openvz.org/doc/OpenVZ-Users-Guide.pdf