= Restart Failed Server =

From time to time our virtual servers exceed their allocated memory and fail with oom (out of memory) errors. It is usually necessary to perform a hard reset of the virtual servers.

How to reset a virtual server depends on the virtualization technology in use by the server.

The first step is to [wiki:server_overview checkout our SVN repository of servers].

Then, examine the "available-servers" directory. You should see a directory for every server we are running.

Inside each directory, there's a file called "virtualization".

The virtualization file will say either: vserver, xen, or kvm.

In addition, there's a symlink called "host" which will point to the host server for this virtual server. For all servers, you will need to [wiki:secure_shell ssh] into the host server to perform a reset.

== xen ==

 * Unplug the server:
{{{
xm destroy <server-name>
}}}
 * Restart the server:
{{{
xm create -c <server-name>
}}}

== kvm ==

 * unplug the server:
{{{
sv down <server-name>
}}}
 * restart:
{{{
sv up <server-name>
}}}

== vserver ==

 * shutdown
{{{
vserver <server-name> stop
}}}
 * start
{{{
vserver <server-name> start
}}}