1) Plain :
This is a default Disk type for VE’s in Virtuozzo. In this type at the time of VE creation all nominal disk size is being allocated or assigned to the VE’s at once. For Example, if you have assigned Disk Space of 100 GB; 100 GB out of available Disk Space will be assigned to the VE. The biggest disadvantage Plain Disk Type is it consumes heavy disk space of Host server even if the VE is not using that much of Disk.

2) Compact:
This Disk Type was introduced with Virtuozzo Update VZU35159 for Virtuozzo 3.5.1 and VZU40006 for Virtuozzo 4.0. Here, disk file of the VE starts small at the time of creation and it becomes larger as soon as user add’s more data. Every newly created VE (without OS) comes with default Disk quota of 17 MBs and goes increasing as more data get added. Compact disks experience slight performance degradation compared to plain disks, but allow to save considerable amount of disk space.

Creating VE with Disk Type.
User can assign Disk Type at the time of VE creation. Following are the commands for the same:

For plain disks:
vzctl create 101 –pkgset w2k3 –disktype plain

For compact disks:
vzctl create 101 –pkgset w2k3 –disktype compact

Setting the VE Disk Type

Disk Type of a VE can be set or changes at any moment during the VE life-cycle by entering following commands from command prompt:

For plain disks:
vzctl set 101 –disktype plain

For compact disks:
vzctl set 101 –disktype compact

Converting Disk Type will include downtime for a VE as it takes sometime for conversion which depends upon total Disk Usage of the VE

Querying Disk Type of the VE

Following is the command to see the Current Disk Type of the VE

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After trying everything we were not able to figure out the exact reason for the problem. So, we asked SWSoft/Parallels for further support regarding this issue. Accoding to them root.efd file (which is HDD of Container) was in mounted stated due to which Virtuozzo was not able to start the Container. To fix the issue they have unmounted the Container using it’s GUID.

To find GUID you can execute following command from the command prompt of the Host Server

Or you can open E:/vz/conf/101.conf and look for Following

Once you find GUID execute following command to unmount the Container

Now, try to start the container

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This Task can be done by setting up Priority for the Yum Repositories. Following are the steps to set Priorities for YUM Repositories

1) Install yum-priorities

The yum-priorities is used to enforce ordered protection of repositories, by giving priorities to repositories. Packages from repositories with a lower priority will never be used to upgrade packages that were installed from a repository with a higher priority. The priorities are also in effect when a new package is installed – if a package is in more than one repository, it will be installed from the repository with the highest priority. This plugin is particularly useful for anyone who uses one or more third-party repositories, as these repositories may update system files, which can potentially compromise the stability of your CentOS installation. This Package can be installed using following YUM Command.

**using option -y with yum will allow yum to install package with taking permission from user.

2) Applying Priorities

Priorities for a Repository need to be added in .repo file. Following is the syntax for setting Priority

Here [NUM] will be the Priority. The Repository with higher priority will be used for installing any package. e.g. if you want your local repository should have highest priority than you can set highest priority for the same like below

All other repositories will have lesser value as compared to Local Repository.

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After that reboot the container and user will able to enable RRAS service from within the container but while starting/enabling RRAS on a VPS it shows following Error:

As per SW-Soft/Parallels Engineers this a bug in Virtuozzo which has been fixed by the Virtuozzo Developer in Virtuozzo VZU450011 Update. This update can be installed using Virtuozzo Update Wizard (vzupdate.exe) and follow the instructions. This wizard will install all the recent Virtuozzo updates and hot-fixes in the correct sequence OR you can download and install it manually using following URL but make sure you have already installed all previous updates before installing any update manually.

You can read more about installing updates manually on Parallels KB

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First we will have to check where atmail is installed. We can do that by querying the RPM files using option “rpm -ql“

The above output shows that the files are created in “/etc/psa-webmail/” directory instead of “/etc/psa/webmail/“

So, copy the file to relevant directory as in the conf file of httpd service

After that we were able to start the httpd service successfully.

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1) The very first step is to find out which process still running inside the VPS. To find the VPS process login to the host server from RDP and open Task Manager (Right Click on task bar >> Task Manger).

2) Sort the processes using CTID which will list all the processes on the basis of VPS ID or Container ID

If you find any processes named “winlogon” and “csrss” under problematic VPS then it’s not possible to kill these processes as they are critical windows services.

3) Disable “vzsrv” service from Service manager Or by executing following command from command prompt

4) Reboot the Host server.

5) As we have disabled vzsrv service non of the VPS will start but you will able to edit the VPS configuration file. Open VPS configuration file from [Path to VZ directory]:\vz\Conf\CTID.conf and add following string into the beginning of the file to disable on boot feature of the VPS.

6) Enable the vzsrv and reboot the host server again.

This will restart all the VPS except the problematic VPS. We would suggest you to scan the VPS using CureIT (after mounting it) as there is a possibility the the VPS is infected with Viruses.

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When we checked the domain on server (from shell) we have found that all physical Address (/var/www/vhost/domain.com) of the domain has been deleted but still Plesk shows the domain.

Following are the steps to remove the domain from Plesk manually.

1) Connect the server using SSH

2) Login into MySQL Prompt as Plesk admin

3) Delete the DNS Zone of the domain

You can verify if any records still persists using following commands

4) Now delete the Domain from Domains table which will remove it from Plesk Domains List

Verify it using select Command.

NOTE: PLEASE Make Sure To Verify The DOMAIN NAME before you make any changes as it might delete some other domain. Also the changes made are irreversible.

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Automating SQL server installation is made easier in MSSQL 2005 version and we can define the components which need to be installed with setup.exe via command prompt OR we can create an ini file which will contain all the information about the installation. In this post I will explain the steps to install MSSQL 2005 using command prompt with the help of single command.

Install MSSQL using Command Prompt (By Defining all modules in command)

1) Insert the MSSQL installation media into the disk drive.

2) Open Command Prompt (Start >> Run >> cmd >> Enter)

3) Execute following command

Here, ADDLOCAL is set to “All” which will install all the components and modules bundled with the MSSQL. If you want customized modules then you can declare the modules instead of “All“.

Install MSSQL using .ini file

1) Open Notepad (Start >> Run >> Notepad >> Enter)

2) Insert all the “Installation Parameters” in that file. Following is the sample file which I have used to install MSSQL on my System

Here, PIDKEY will be the Product Key of the product shipped with MSSQL.

3) Save this file with extension .ini (like sqlsetup.ini)

4) Execute following command to run the setup

Points to Note:

1) While specifying the accounts like SQLACCOUNT, AGTACCOUNT and SQLBROWSERACCOUNT make sure you define proper users. Users can be

2) Microsoft provides a template.ini file in the installation media but I would strongly recommend to remove the options that you don’t want.

You can refer to Microsoft tutorial for more information and component help at http://msdn.microsoft.com/en-us/library/ms144259.aspx

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OR if you get following Error after login to VE by RDP

“You are connected to the remote computer. However, an error occurred while an initial user program was starting, so you are being logged off. Contact the system administrator for assistance.“

Such problems occurs due to corrupted or missed C:/Windows/explorer.exe of the VPS or VE.

This problem can be fixed by copying C:/Windows/explorer.exe file of the host server to the VPS. Following are the steps to copy

1) Stop the VPS
#       vzctl stop VEID

2) Mount the VPS
#      vzctl mount VEID

Now we will able to access VPS files from host server in C:/vz/private/VEID/ Directory.

3) Copy “C:/Windows/explorer.exe” from Host server to “C:/vz/private/VEID/Windows/explorer.exe“

4) Unmount and start the VPS
#      vzctl umount VEID
#      vzctl start VEID

Please try to login to the VPS now.

Note: Here, VEID will be the VPS ID of the VE which is facing problem.

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Recently while recreating Service VPS (VPS ID 1) on a Windows Virtuozzo Node it was getting failed with following Error:

ERROR: Cannot adjust logon rights for vzagent user

SOLUTION

The error “Drop logon user rights” could fail when

1) the previous attempt of the service container recreation failed or
2) the vzagent user has the different then the default password.

This problem can be fixed by following steps (please, read the whole message, before proceeding):

1) Open Computer Management Console from Start >> Administrative tools >> Computer management (or just right-click on the My Computer icon of the Start menu and choose “manage”)

2) Expand “Local users and groups” section and enter into “Users“.

3) Locate vzagent user and remove it.

Try to re-create the Service VPS.

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