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Operating Systems Linux Red Hat How to find which host a VM is running on? Post 302908389 by keelba on Monday 7th of July 2014 12:41:15 PM
Old 07-07-2014
How to find which host a VM is running on?

We have quite a few Linux VMs running (several hundred). Some are running in VMware and some are running on Citrix XenServer.

I know that it is possible, for example, to go into vSphere and search for the host name. But there are times where it is not found for whatever reason and I want to log into the guest and see host what it thinks it is running on.

Does anyone know a way for either of the above to find out the host that is running a particular guest from the Linux guest OS?

I used to be able to do this with HP-UX HPVM by installing the vm toolbox onto the guest. And with Solaris sparse root zones I used to be able to tell by looking at the arp cache. I'm just checking if there is any way at all to do something similar with VMware or XenServer.
 

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NSCTL(8)						    System Management Commands							  NSCTL(8)

NAME
nsctl - manage running l2tpns instance SYNOPSIS
nsctl [-d] [-h host[:port]] [-t timeout] command [arg ...] DESCRIPTION
nsctl sends commands to a running l2tpns process. It provides both for the loading or unloading of plugins and also the management of ses- sions via functions provided by those plugins. OPTIONS
-d Enable debugging output. -h host[:port] The host running l2tpns that should receive the message. By default the message is sent to UDP port 1702 on localhost. -t timeout Timeout in seconds to wait for a response from the server. COMMANDS
The first argument specifies the command to send to l2tpns . The following commands are as defined: load_plugin plugin Load the named plugin. unload_plugin plugin Unload the named plugin. help Each loaded plugin is queried for what commands it supports and the synopsis for each is output. Any other value of command (and args if any) are sent to l2tpns as-is, to be passed to each plugin which registers a plugin_control func- tion in turn (in which it may be acted upon). SEE ALSO
l2tpns(8) AUTHOR
This manual page was written by Jonathan McDowell <noodles@the.earth.li>, for the Debian GNU/Linux system (but may be used by others). L2TPNS 2004/11/17 15:08:19 NSCTL(8)
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