OpenVZ Virtuozzo Containers Wiki - User contributions [en]

OS template cache preparation

2008-10-16T12:10:36Z

Okobloko: /* Alternative: use precreated template cache */

This article describes the procedure of an OS template cache creation. It assumes you already have OpenVZ installed and running. The steps needed to achieve it are documented in the [[Quick installation]] document.

== Terminology ==

Please make sure you understand the following terms.

{{:OS template}}
{{:OS template metadata}}
{{:OS template cache}}

== Creating an OS template cache ==
You can create an [[OS template cache]] using template utilities and [[OS template metadata]] right on your [[hardware node]]. The process is automated and will take from about 10 minutes to a few hours, depending on the network speed, and the result will be most up-to-date template cache.

=== Installing template utilities ===

You have to install a few packages in order to be able to create/update OS template cache(s).

==== Using yum ====
<pre>
# yum install vzpkg vzyum vzrpm43-python vzrpm44-python vzctl-lib
</pre>

==== Using rpm ====
Packages are available from [http://openvz.org/download/template/utils/ Download » Templates » Utilities]. You need both <tt>vzpkg</tt> and <tt>vzyum</tt> packages, as well as one or both <tt>vzrpm43</tt>/<tt>vzrpm44</tt> (including their <tt>-python</tt> counterparts), depending on the OS templates being used.

Install these utilities using rpm:

<pre>
# rpm -ihv vzpkg*.rpm vzyum*.rpm vzrpm44*.rpm
</pre>

In Red Hat Enterprise Linux, to install <tt>vzyum</tt> you will need <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-elementtree&system=redhat python-elementtree]</tt>, <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-sqlite&system=redhat python-sqlite]</tt>, and <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-urlgrabber&system=redhat python-urlgrabber]</tt>. These packages might have dependencies of their own. For example, <tt>python-sqlite</tt> needs <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=sqlite&system=redhat sqlite]</tt>.

=== Installing OS template metadata ===

To create an [[OS template cache]], you need to get the [[OS template metadata|metadata]] for the chosen OS template(s).

==== Using yum ====
To see which templates are available, run
<pre>
# yum search vztmpl
</pre>

To install some of the templates, run
<pre>
# yum install vztmpl-XXX [...]
</pre>

==== Using rpm ====
Get the chosen <tt>vztmpl-*</tt> packages from [http://openvz.org/download/template/metadata/ Downloads » Templates » Metadata] (or directly from [http://download.openvz.org/template/metadata/ download.openvz.org/template/metadata] or one of the [[Download mirrors|mirrors]] and install them:

<pre>
# rpm -ihv vztmpl-*.rpm
</pre>

=== Running <tt>vzpkgcache</tt> ===

Run the <tt>vzpkgcache</tt> utility; see the vzpkgcache(8) man page for details. It will create or update the caches of all the templates for which the corresponding metadata exist.

# vzpkgcache centos-4-i386-minimal

== Alternative: use precreated template cache ==

As an alternative to creating a cache using template metadata, you can use precreated template cache taken from [http://openvz.org/download/template/cache Downloads » Templates » Precreated], or directly from [http://download.openvz.org/template/precreated/ download.openvz.org/template/precreated], or from one of the [[Download mirrors|mirrors]].

Precreated templates can be easily updated using the following algorithm:
# create temporary [[container]] based on template
# update [[container]] using OS-specific tools (yum, apt or similar)
# pack [[container]] as a new template
Examples of this procedure are described in details at [[Updating Ubuntu template]], [[Updating Debian template]], [[Fedora template update]]

In order to use precreated template cache files, download files for chosen OS distributions and place them as-is (no unpacking needed) to the <tt>/vz/template/cache</tt> directory.

'''NOTE:''' If you use precreated CentOS-4 templates and wish to install software using vzyum, you will probably run into error like this:

[root@localhost tmp]# vzyum CTID install mypackage
[root@localhost tmp]# ERROR: No such OS template: install

This might apply to Fedora also. To fix this problem, install the appropriate [[OS template metadata]] on the OpenVZ host, for example

yum install vztmpl-centos-4

[Unverified note] : After creating a new OSTemplate cache called "centos4-i386-[ASINGLEWORD].tar.gz from a Container (on which vzyum worked) based on centos4-i386-default.tar.gz, vzyum failed to work (showing "No such OS template: install").

Here is the "solution" I worked out :
The new OSTemplate should be named "centos4-i386-[ASINGLEWORD].tar.gz", and in /vz/template/centos/4/i386/config you should copy the default.list to [ASINGLEWORD].list. vzyum then works (for me!). I have tried to verify this by creating templates with [MULTIPLEWORDS], which fail, and by creating templates without a corresponding [ASINGLEWORLD].conf file, which also fail - indicating that using a single word seems to be important (no hyphens etc). Good luck.

== Next step ==

Follow on to the [[container creation]] article.

[[Category: Installation]]
[[Category: Templates]]

OS template cache preparation

2008-10-02T10:48:08Z

Okobloko: /* Alternative: use precreated template cache */

This article describes the procedure of an OS template cache creation. It assumes you already have OpenVZ installed and running. The steps needed to achieve it are documented in the [[Quick installation]] document.

== Terminology ==

Please make sure you understand the following terms.

{{:OS template}}
{{:OS template metadata}}
{{:OS template cache}}

== Creating an OS template cache ==
You can create an [[OS template cache]] using template utilities and [[OS template metadata]] right on your [[hardware node]]. The process is automated and will take from about 10 minutes to a few hours, depending on the network speed, and the result will be most up-to-date template cache.

=== Installing template utilities ===

You have to install a few packages in order to be able to create/update OS template cache(s).

==== Using yum ====
<pre>
# yum install vzpkg vzyum vzrpm43-python vzrpm44-python vzctl-lib
</pre>

==== Using rpm ====
Packages are available from [http://openvz.org/download/template/utils/ Download » Templates » Utilities]. You need both <tt>vzpkg</tt> and <tt>vzyum</tt> packages, as well as one or both <tt>vzrpm43</tt>/<tt>vzrpm44</tt> (including their <tt>-python</tt> counterparts), depending on the OS templates being used.

Install these utilities using rpm:

<pre>
# rpm -ihv vzpkg*.rpm vzyum*.rpm vzrpm44*.rpm
</pre>

In Red Hat Enterprise Linux, to install <tt>vzyum</tt> you will need <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-elementtree&system=redhat python-elementtree]</tt>, <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-sqlite&system=redhat python-sqlite]</tt>, and <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-urlgrabber&system=redhat python-urlgrabber]</tt>. These packages might have dependencies of their own. For example, <tt>python-sqlite</tt> needs <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=sqlite&system=redhat sqlite]</tt>.

=== Installing OS template metadata ===

To create an [[OS template cache]], you need to get the [[OS template metadata|metadata]] for the chosen OS template(s).

==== Using yum ====
To see which templates are available, run
<pre>
# yum search vztmpl
</pre>

To install some of the templates, run
<pre>
# yum install vztmpl-XXX [...]
</pre>

==== Using rpm ====
Get the chosen <tt>vztmpl-*</tt> packages from [http://openvz.org/download/template/metadata/ Downloads » Templates » Metadata] (or directly from [http://download.openvz.org/template/metadata/ download.openvz.org/template/metadata] or one of the [[Download mirrors|mirrors]] and install them:

<pre>
# rpm -ihv vztmpl-*.rpm
</pre>

=== Running <tt>vzpkgcache</tt> ===

Run the <tt>vzpkgcache</tt> utility; see the vzpkgcache(8) man page for details. It will create or update the caches of all the templates for which the corresponding metadata exist.

# vzpkgcache centos-4-i386-minimal

== Alternative: use precreated template cache ==

As an alternative to creating a cache using template metadata, you can use precreated template cache taken from [http://openvz.org/download/template/cache Downloads » Templates » Precreated], or directly from [http://download.openvz.org/template/precreated/ download.openvz.org/template/precreated], or from one of the [[Download mirrors|mirrors]].

Precreated templates can be easily updated using the following algorithm:
# create temporary [[container]] based on template
# update [[container]] using OS-specific tools (yum, apt or similar)
# pack [[container]] as a new template
Examples of this procedure are described in details at [[Updating Ubuntu template]], [[Updating Debian template]], [[Fedora template update]]

In order to use precreated template cache files, download files for chosen OS distributions and place them as-is (no unpacking needed) to the <tt>/vz/template/cache</tt> directory.

'''NOTE:''' If you use precreated CentOS-4 templates and wish to install software using vzyum, you will probably run into error like this:

[root@localhost tmp]# vzyum CTID install mypackage
[root@localhost tmp]# ERROR: No such OS template: install

This might apply to Fedora also. To fix this problem, install the appropriate [[OS template metadata]] on the OpenVZ host, for example

yum install vztmpl-centos-4

[Unverified note] : After creating a new OSTemplate cache called "centos4-i386-[ASINGLEWORD].tar.gz from a Container (on which vzyum worked) based on centos4-i386-default.tar.gz, vzyum failed to work (showing "No such OS template: install").

Here is the "solution" I worked out :
The new OSTemplate should be named "centos4-i386-[ASINGLEWORD].tar.gz", and in /vz/template/centos/4/i386/config you should copy the default.conf to [ASINGLEWORD].conf. vzyum then works (for me!). I have tried to verify this by creating templates with [MULTIPLEWORDS], which fail, and by creating templates without a corresponding [ASINGLEWORLD].conf file, which also fail. Good luck.

== Next step ==

Follow on to the [[container creation]] article.

[[Category: Installation]]
[[Category: Templates]]

OS template cache preparation

2008-10-02T10:46:45Z

Okobloko: /* Alternative: use precreated template cache */

This article describes the procedure of an OS template cache creation. It assumes you already have OpenVZ installed and running. The steps needed to achieve it are documented in the [[Quick installation]] document.

== Terminology ==

Please make sure you understand the following terms.

{{:OS template}}
{{:OS template metadata}}
{{:OS template cache}}

== Creating an OS template cache ==
You can create an [[OS template cache]] using template utilities and [[OS template metadata]] right on your [[hardware node]]. The process is automated and will take from about 10 minutes to a few hours, depending on the network speed, and the result will be most up-to-date template cache.

=== Installing template utilities ===

You have to install a few packages in order to be able to create/update OS template cache(s).

==== Using yum ====
<pre>
# yum install vzpkg vzyum vzrpm43-python vzrpm44-python vzctl-lib
</pre>

==== Using rpm ====
Packages are available from [http://openvz.org/download/template/utils/ Download » Templates » Utilities]. You need both <tt>vzpkg</tt> and <tt>vzyum</tt> packages, as well as one or both <tt>vzrpm43</tt>/<tt>vzrpm44</tt> (including their <tt>-python</tt> counterparts), depending on the OS templates being used.

Install these utilities using rpm:

<pre>
# rpm -ihv vzpkg*.rpm vzyum*.rpm vzrpm44*.rpm
</pre>

In Red Hat Enterprise Linux, to install <tt>vzyum</tt> you will need <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-elementtree&system=redhat python-elementtree]</tt>, <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-sqlite&system=redhat python-sqlite]</tt>, and <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=python-urlgrabber&system=redhat python-urlgrabber]</tt>. These packages might have dependencies of their own. For example, <tt>python-sqlite</tt> needs <tt>[http://rpmfind.net/linux/rpm2html/search.php?query=sqlite&system=redhat sqlite]</tt>.

=== Installing OS template metadata ===

To create an [[OS template cache]], you need to get the [[OS template metadata|metadata]] for the chosen OS template(s).

==== Using yum ====
To see which templates are available, run
<pre>
# yum search vztmpl
</pre>

To install some of the templates, run
<pre>
# yum install vztmpl-XXX [...]
</pre>

==== Using rpm ====
Get the chosen <tt>vztmpl-*</tt> packages from [http://openvz.org/download/template/metadata/ Downloads » Templates » Metadata] (or directly from [http://download.openvz.org/template/metadata/ download.openvz.org/template/metadata] or one of the [[Download mirrors|mirrors]] and install them:

<pre>
# rpm -ihv vztmpl-*.rpm
</pre>

=== Running <tt>vzpkgcache</tt> ===

Run the <tt>vzpkgcache</tt> utility; see the vzpkgcache(8) man page for details. It will create or update the caches of all the templates for which the corresponding metadata exist.

# vzpkgcache centos-4-i386-minimal

== Alternative: use precreated template cache ==

As an alternative to creating a cache using template metadata, you can use precreated template cache taken from [http://openvz.org/download/template/cache Downloads » Templates » Precreated], or directly from [http://download.openvz.org/template/precreated/ download.openvz.org/template/precreated], or from one of the [[Download mirrors|mirrors]].

Precreated templates can be easily updated using the following algorithm:
# create temporary [[container]] based on template
# update [[container]] using OS-specific tools (yum, apt or similar)
# pack [[container]] as a new template
Examples of this procedure are described in details at [[Updating Ubuntu template]], [[Updating Debian template]], [[Fedora template update]]

In order to use precreated template cache files, download files for chosen OS distributions and place them as-is (no unpacking needed) to the <tt>/vz/template/cache</tt> directory.

'''NOTE:''' If you use precreated CentOS-4 templates and wish to install software using vzyum, you will probably run into error like this:

[root@localhost tmp]# vzyum CTID install mypackage
[root@localhost tmp]# ERROR: No such OS template: install

This might apply to Fedora also. To fix this problem, install the appropriate [[OS template metadata]] on the OpenVZ host, for example

yum install vztmpl-centos-4

[Unverified note] : After creating a new OSTemplate cache from a Container (on which vzyum worked) based on centos4-i386-default.tar.gz, vzyum failed to work (showing "No such OS template: install"). Here is the solution I worked out :
The new OSTemplate should be named "centos4-i386-[ASINGLEWORD].tar.gz", and in /vz/template/centos/4/i386/config you should copy the default.conf to [ASINGLEWORD].conf. vzyum then works (for me!). I have tried to verify this by creating templates with [MULTIPLEWORDS], which fail, and by creating templates without a corresponding [SINGLEWORLD].conf file, which also fail. Good luck.

== Next step ==

Follow on to the [[container creation]] article.

[[Category: Installation]]
[[Category: Templates]]

RequestedTutorials

2008-09-23T16:00:50Z

Okobloko:

Please make a list of the tutorials you'd like to have written up or done in a quick screen capture movie.

[[Category:HOWTO]]

There are no explicit instructions here about creating an Application Template for VPS's. Is this even possible with OpenVZ? A tutorial would be great.