Openvz7 : Install and Basics

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This article relied to openvz7/virtuozzo.

You may use ovz7 on RHEL7/Centos7 x64 OS. But we used to download exact openvz7 iso and install bare metal system : info: https://openvz.org/Virtuozzo ISO: https://download.openvz.org/virtuozzo/releases/7.0/x86_64/iso/


Once the system installed make sure it's updated

yum update&&yum upgrade

check kernel&OS build and install corresponding openvz

uname -a
cat /etc/issue

Assuming you've used minimal ISO/netinstall so you need to download/install openvz,example link:

yum localinstall https://download.openvz.org/virtuozzo/releases/openvz-7.0.6-518/x86_64/os/Packages/o/openvz-release-7.0.6-5.vz7.x86_64.rpm
  • in some cases (mostly on x32 systems ) you'll get an error of missed dep. "python_subprocess32". you can install it if required:
#wget http://cbs.centos.org/kojifiles/packages/python-subprocess32/3.2.6/7.el7/x86_64/python-subprocess32-3.2.6-7.el7.x86_64.rpm
#rpm -i python-subprocess32-3.2.6-7.el7.x86_64.rpm


Virtuozzo/openvz 7 config located as in previous versions:

cat /etc/vz/vz.conf


Install openvz kernel. (Check the cat /boot/grub2/grub.cfg before and after you'll see the changes after installing)

yum install vzkernel

Reboot system

We are using tolls from epel repo so we'll add it:

yum install epel-release

Check the repolist you have:

 yum repolist
  Loaded plugins: fastestmirror, openvz, priorities, product-id, rhsm-auto-add-pools, search-disabled-repos, vzlinux
  Trying to discover and attach new pools
   Loading mirror speeds from cached hostfile
   * epel: nl.mirror.babylon.network
   * openvz-os: ftp.nluug.nl
   * openvz-updates: ftp.nluug.nl
   557 packages excluded due to repository priority protections
   repo id                                                                                                    repo name                                                                                                               
   status
   !epel/x86_64                                                                                               Extra Packages for Enterprise Linux 7 - x86_64                                                                          
    11,882+460
   !openvz-os                                                                                                 OpenVZ                                                                                                                         
    198
   !openvz-updates                                                                                            OpenVZ Updates                                                                                                                  
    11
   !virtuozzolinux-base                                                                                       VirtuozzoLinux Base                                                                                                      
    10,147+98
   !virtuozzolinux-factory                                                                                    VirtuozzoLinux Factory                                                                                                            
    0
   !virtuozzolinux-factory-debuginfo                                                                          VirtuozzoLinux Factory debug packages                                                                                            
    0
   !virtuozzolinux-updates                                                                                    VirtuozzoLinux Updates  

Install prtctl (used instead of vzctl, that also may be installed) and ploop

yum install prlctl prl-disp-service ploop

Now you need to install EZ OS Templates. The openvz7 have rather differ "understanding" of OS templates that makes life easier: Check available EZ OS Templates:

vzpkg list --available
 centos-6-x86_64                    openvz-os
 centos-7-x86_64                    openvz-os
 debian-7.0-x86_64                  openvz-os
 debian-8.0-x86_64                  openvz-os
 debian-9.0-x86_64                  openvz-os
 fedora-23-x86_64                   openvz-os
 sles-11-x86_64                     openvz-os
 sles-12-x86_64                     openvz-os
 suse-42.1-x86_64                   openvz-os
 suse-42.2-x86_64                   openvz-os
 suse-42.3-x86_64                   openvz-os
 ubuntu-14.04-x86_64                openvz-os
 ubuntu-16.04-x86_64                openvz-os
 ubuntu-17.10-x86_64                openvz-os
 vzlinux-6-x86_64                   openvz-os
 vzlinux-7-x86_64                   openvz-os

Install template package, like:

vzpkg install template centos-7-x86_64

For some templates you need to configure additional parameters in map file /etc/vztt/url.map Check https://docs.virtuozzo.com/virtuozzo_7_users_guide/managing-virtual-machines-and-containers/creating-virtual-machines-and-containers.html for details. For example fro SLES template you need to set the $RCE parameter and SUSE repository credentials.

We'll skip it coz we use usual Centos7

ALso EZ template could be installed using

yum install centos-7-x86_64-ez

and removed in the same way for example

yum remove centos-7-x86_64-ez


Next create template cache:

vzpkg create cache centos-7-x86_64

Now you can create the container:

prlctl create 101 --vmtype ct --ostemplate centos-7-x86_64

Old style also should work:

vzctl create 102 --ostemplate centos-7-x86_64

Check container list:

prlctl list -i

Start container:

prlctl start 101

As you may note the containers private area usually locates /vz/private/CTID/ Containers config located in /etc/vz/config/ but used EnvID instead old_ID , like

 cat /etc/vz/conf/9ae18ebf-0e6c-4f7f-8c3d-5dc683da7da4.conf 

as we did not change default OS template and not using any management software at this point we need to add IP to the CT manually in config file. open the file specified above (the exact EnvID will be differ) and add the next lines depending on your network:

IP_ADDRESS="191.111.201.11"
HOSTNAME="testCT.vpsget.com"
NAMESERVER="8.8.8.8"

restart container

prlctl restart 101 

To enter inside container you may use the next commands:

prlctl enter 101

or

vzctl enter 101

Also entering by exact ID working as well:

vzctl enter  9ae18ebf-0e6c-4f7f-8c3d-5dc683da7da4

To exit from CT type :

exit

you also may use vzlist command to display list of containers:

vzlist

Virtual Machines usage KVM based/virtio.

Openvz7 allow us to use VirtualMachines (VM) as well as containers! Try to create the new windows VM:

prlctl create winTest --distribution win-10 --vmtype vm

the required VM files will be placed at the next dir:

/vz/vmprivate/<UUID

The next step you need to install OS in VM using VNC. Enable VNC for VM created above:

prlctl set winTest --vnc-mode manual --vnc-port 5901 --vnc-passwd VNCPass1test

Start VM:

 prlctl  start winTest



...in proggress