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+ →Applying New Configuration Sample to Container
In the scenario above, the first run of the vzcfgvalidate utility found a critical error for the kmemsize parameter value. After setting reasonable values for kmemsize, the resulting configuration produced only recommendations, and the Container can be safely run with this configuration.
=== Applying New Configuration Sample to Container ===
The OpenVZ software enables you to change the configuration sample file a Container is based on and, thus, to modify all the resources the Container may consume and/or allocate at once. For example, if Container 101 is currently based on the <code>light</code> configuration sample and you are planning to run some more heavy-weight application inside the Container, you may wish to apply the <code>basic</code> sample to it instead of <code>light</code>, which will automatically adjust the necessary Container resource parameters. To this effect, you can execute the following command on the Node:
# '''vzctl set 101 --applyconfig basic --save'''
Saved parameters for CT 101
This command reads the resource parameters from the <code>ve-basic.conf-sample</code> file located in the <code>/etc/vz/conf</code> directory and applies them one by one to Container 101.
When applying new configuration samples to Containers, please keep in mind the following:
* All Container sample files are located in the /etc/vz/conf directory on the Hardware Node and are named according to the following pattern: <code>ve-''name''.conf-sample</code>. You should specify only the <code>''name''</code> part of the corresponding sample name after the <code>--applyconfig</code> option (<code>basic</code> in the example above).
* The <code>--applyconfig</code> option applies all the parameters from the specified sample file to the given Container, except for the <code>OSTEMPLATE</code>, <code>VE_ROOT</code>, <code>VE_PRIVATE</code>, <code>HOSTNAME</code>, <code>IP_ADDRESS</code>, <code>TEMPLATE</code>, <code>NETIF</code> parameters (if they exist in the sample file).
* You may need to restart your Container depending on the fact whether the changes for the selected parameters can be set on the fly or not. If some parameters could not be configured on the fly, you will be presented with the corresponding message informing you of this fact.
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