OpenVZ Virtuozzo Containers Wiki - User contributions [en]

NX inside VE

2010-05-02T08:58:43Z

Chronos: Added demo image

You can run full graphical remote desktop inside container using [http://en.wikipedia.org/wiki/NX_technology NX technology]. This is handy for when you work from home and you wish to run a web browser on your work's internal network to access local resources. You can use NX client to connect to remote NX server.

= Fedora =

[[File:NX server on Fedora 12.png|thumb|300px|Connecting remotely with NX Client to Fedora inside OpenVZ container.]]

* Use fedora template to create new container and install desktop of your choice:

GNOME:

<pre>yum groupinstall "GNOME Desktop Environment"</pre>

KDE:

<pre>yum groupinstall "KDE (K Desktop Environment)"</pre>

XFce:

<pre>yum groupinstall "XFCE"</pre>

* You may need to install additional package audiofile:
<pre>yum install audiofile</pre>

* Download installation RPM packages for server from site [http://www.nomachine.com/select-package.php?os=linux&id=1 www.nomachine.com]. Choose right architecture i386 or x86_64.

Example:
<pre>wget http://64.34.161.181/download/3.4.0/Linux/nxclient-3.4.0-5.i386.rpm
wget http://64.34.161.181/download/3.4.0/Linux/nxnode-3.4.0-6.i386.rpm
wget http://64.34.161.181/download/3.4.0/Linux/FE/nxserver-3.4.0-8.i386.rpm</pre>

* Do simple manual installation of RPM packages.

Example:
<pre>
rpm -ivh nxclient-3.4.0-5.i386.rpm
rpm -ivh nxnode-3.4.0-6.i386.rpm
rpm -ivh nxserver-3.4.0-8.i386.rpm</pre>

* Done. You can now connect from NX client to your server.

= Ubuntu =

== Installation ==

Create a new container using the gutsy template. Edit /etc/apt/sources.list and enable the "multiverse" repository.
Install X and XDM
<pre>apt-get install xorg xdm</pre>
Then add this 3rd party repo to sources.list
<pre>
deb http://www.datakeylive.com/ubuntu gutsy main
deb-src http://www.datakeylive.com/ubuntu gutsy main
</pre>
Install the repo keys and update:
<pre>
wget http://www.datakeylive.com/ubuntu/dists/gutsy/wjeremy.key -O - | apt-key add -
wget http://www.datakeylive.com/ubuntu/dists/gutsy/alivesoftware.key -O - | apt-key add -
sudo apt-get update
</pre>
Install FreeNX (*)
<pre>
apt-get install expect openssh-server tcl8.4 libxcomp2 libxcompext2 libxcompshad nxlibs nxagent nxproxy nxclient freenx openssl
</pre>
For Ubuntu 8.04 :
<pre>
apt-get install expect openssh-server tcl8.4 libxcomp3 libxcompext3 libxcompshad nxlibs nxagent nxproxy nxclient freenx-server openssl
</pre>
Finally install XFCE
<pre>
apt-get install xfce4
</pre>

== Configuration ==

=== Configuring X ===
In /etc/X11/xdm/xdm-config, comment out the line where it says '''DisplayManager.requestPort: 0'''

In /etc/X11/xdm/Xservers, comment out the line ''':0 local /usr/bin/X :0 vt7''' (this starts a local X server, which will fail)

In /etc/X11/xdm/Xaccess, uncomment the line with '''* #any host can get a login window''' (Please keep in mind the security implications by the above line. Read the comments found in the file and set it appropriately)

=== Configure NX Server ===

Edit /etc/X11/xorg.conf. Ensure that the files section looks similar to this:

<pre>
Section "Files"

# path to defoma fonts
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
EndSection
</pre>

Now create a local user account:
<pre>useradd -m <username></pre>

Now add this user to nxserver:
<pre>nxserver --adduser <username></pre>

=== Configure NX client ===

Setup the Host/Port.
In the desktop section select Unix and Custom. In Settings, select "Run the default X client script on server" and select "New virtual Desktop".

Now try to connect. You should get the XFCE desktop.

Thanks to dantalizing for the feedback.

== Troubleshooting ==

(*)
If you get any errors like:
<pre>
dpkg: error processing /var/cache/apt/archives/libxcomp3_3.1.0-6-2_i386.deb (--unpack):
trying to overwrite `/usr/lib/libXcomp.so.3.1.0', which is also in package libxcomp2
</pre>
while installing the libxcomp package, just force-install the libxcomp package:
<pre>
# cd /var/cache/apt/archives
# dpkg --force-all -i libxcomp3_3.1.0-6-2_i386.deb
# apt-get -f install
</pre>

[[Category: HOWTO]]
[[Category: X]]

File:NX server on Fedora 12.png

2010-05-02T08:53:38Z

Chronos: Connectiong to running Fedora 12 inside OpenVZ container using FreeNX remote desktop.

Connectiong to running Fedora 12 inside OpenVZ container using FreeNX remote desktop.

NX inside VE

2010-05-02T08:08:15Z

Chronos: Added howto for simple installation on Fedora

You can run full graphical remote desktop inside container using [http://en.wikipedia.org/wiki/NX_technology NX technology]. This is handy for when you work from home and you wish to run a web browser on your work's internal network to access local resources. You can use NX client to connect to remote NX server.

= Fedora =

* Use fedora template to create new container and install desktop of your choice:

GNOME:

<pre>yum groupinstall "GNOME Desktop Environment"</pre>

KDE:

<pre>yum groupinstall "KDE (K Desktop Environment)"</pre>

XFce:

<pre>yum groupinstall "XFCE"</pre>

* You may need to install additional package audiofile:
<pre>yum install audiofile</pre>

* Download installation RPM packages for server from site [http://www.nomachine.com/select-package.php?os=linux&id=1 www.nomachine.com]. Choose right architecture i386 or x86_64.

Example:
<pre>wget http://64.34.161.181/download/3.4.0/Linux/nxclient-3.4.0-5.i386.rpm
http://64.34.161.181/download/3.4.0/Linux/nxnode-3.4.0-6.i386.rpm
http://64.34.161.181/download/3.4.0/Linux/FE/nxserver-3.4.0-8.i386.rpm</pre>

* Do simple manual installation of RPM packages.

Example:
<pre>
rpm -ivh nxclient-3.4.0-5.i386.rpm
rpm -ivh nxnode-3.4.0-6.i386.rpm
rpm -ivh nxserver-3.4.0-8.i386.rpm</pre>

* Done. You can now connect from NX client to your server.

= Ubuntu =

== Installation ==

Create a new container using the gutsy template. Edit /etc/apt/sources.list and enable the "multiverse" repository.
Install X and XDM
<pre>apt-get install xorg xdm</pre>
Then add this 3rd party repo to sources.list
<pre>
deb http://www.datakeylive.com/ubuntu gutsy main
deb-src http://www.datakeylive.com/ubuntu gutsy main
</pre>
Install the repo keys and update:
<pre>
wget http://www.datakeylive.com/ubuntu/dists/gutsy/wjeremy.key -O - | apt-key add -
wget http://www.datakeylive.com/ubuntu/dists/gutsy/alivesoftware.key -O - | apt-key add -
sudo apt-get update
</pre>
Install FreeNX (*)
<pre>
apt-get install expect openssh-server tcl8.4 libxcomp2 libxcompext2 libxcompshad nxlibs nxagent nxproxy nxclient freenx openssl
</pre>
For Ubuntu 8.04 :
<pre>
apt-get install expect openssh-server tcl8.4 libxcomp3 libxcompext3 libxcompshad nxlibs nxagent nxproxy nxclient freenx-server openssl
</pre>
Finally install XFCE
<pre>
apt-get install xfce4
</pre>

== Configuration ==

=== Configuring X ===
In /etc/X11/xdm/xdm-config, comment out the line where it says '''DisplayManager.requestPort: 0'''

In /etc/X11/xdm/Xservers, comment out the line ''':0 local /usr/bin/X :0 vt7''' (this starts a local X server, which will fail)

In /etc/X11/xdm/Xaccess, uncomment the line with '''* #any host can get a login window''' (Please keep in mind the security implications by the above line. Read the comments found in the file and set it appropriately)

=== Configure NX Server ===

Edit /etc/X11/xorg.conf. Ensure that the files section looks similar to this:

<pre>
Section "Files"

# path to defoma fonts
FontPath "/usr/share/fonts/X11/misc"
FontPath "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath "/usr/share/fonts/X11/Type1"
FontPath "/usr/share/fonts/X11/100dpi"
FontPath "/usr/share/fonts/X11/75dpi"
EndSection
</pre>

Now create a local user account:
<pre>useradd -m <username></pre>

Now add this user to nxserver:
<pre>nxserver --adduser <username></pre>

=== Configure NX client ===

Setup the Host/Port.
In the desktop section select Unix and Custom. In Settings, select "Run the default X client script on server" and select "New virtual Desktop".

Now try to connect. You should get the XFCE desktop.

Thanks to dantalizing for the feedback.

== Troubleshooting ==

(*)
If you get any errors like:
<pre>
dpkg: error processing /var/cache/apt/archives/libxcomp3_3.1.0-6-2_i386.deb (--unpack):
trying to overwrite `/usr/lib/libXcomp.so.3.1.0', which is also in package libxcomp2
</pre>
while installing the libxcomp package, just force-install the libxcomp package:
<pre>
# cd /var/cache/apt/archives
# dpkg --force-all -i libxcomp3_3.1.0-6-2_i386.deb
# apt-get -f install
</pre>

[[Category: HOWTO]]
[[Category: X]]

Mounting filesystems

2009-05-28T06:16:07Z

Chronos: Info about mount on start

To mount a file system inside a container, you have several choices:

* [[NFS]], when container as an NFS client
* [[FUSE]] (filesystem in userspace)
* [[Bind mounts]] from Hardware Node

Also, you can grant a container an access a physical block device, and use that device from inside the container. Not all file systems are working inside a container; check /proc/filesystems inside a container to find out.

=Mount filesystem on VE start=

You need to create mount script in openvz configuration directory (/etc/vz/conf) with name <veid>.mount. If you need to mount filesystem to all containers than name of script should be vps.mount and inside script ${VEID} variable can be used.

Example:
<pre>#!/bin/bash
mount --bind /mnt/disk /vz/root/${VEID}/mnt/disk
exit ${?}</pre>

For unmounting filesystem file vps.umount can be used.

Example:
<pre>#!/bin/bash
umount /vz/root/${VEID}/mnt/disk
exit 0</pre>

''Notice:''
<veid>.umount scripts are not very necessary: everything will be umounted automatically on VE stop. But you should than mount with -n option in mount script.