I have just installed 4 servers in a cluster. I have one virtual machine. i have tested cold migrations & these work without any issue. when i try to migrate with the machine switched on i get a message "migration from servername fqdn: no guest OS heartbeats are being received. either the guest OS is not responding or VMware tools is not configured properly". if i carry on the operation it works anyway! is this something i should be worried about/ the tools are configured & up to data.
if i try to migrate when the server is tswitched on, is this classed as using "vmotion"?
The message you are getting is for VMware tools. Do you have VMWare tools installed? Is it running? The wizard is telling you that it doesn't know if the OS within the VM is alive. If you "carry on", it does what it will normally do anyhow.
It looks that you do have the tools installed. I would uninstall and reinstall the tools first.
Message was edited by: kjb007 : Updated the tools suggestion
Yes, when you try to migrate a Virtual machine when its powered on is called " VMotion", a kind of Hot migration.
When you try to initiate this, the ESX host tries to check for the availability of the VM from the feature called heartbeats.
This is given out fromt he VMware tools installed in the Virtual machine.
If you have already installed the tools in the VM, then try to restart the vmware service in the VM, or uninstall and reinstall as told in the earlier comment.
If you are using linux VM, then try to run the vmware-config.pl script, this could help.
Thanks for all the replies. strange thing is, after the server has vmotioned across the message appears if you try to vmotion straight away to another machine. if i try again after 5 minutes the message does not occur
yes, as when once the vmotion is done, the vmware tools in the VM are working fine, as the tools service refresh after the vmotion.
And when they are running, you tried again, so it happend smoothly without any errors again.