Would like to know if there is a way to vmotion everything off a host at once? Have never really tried multiple vmotions from 1 host to another host or multiple host's at one time for fear of time-out's etc...Also what does relocating VM files even accomplish? I have tried this and it doesn't seem to do anything (unlike remove from inventory).
Nope. When you put a host into Maintenance mode, it will prevent powering on additional VMs, and - if you are in a DRS-enabled environment, it will automatically begin using VMotion to migrate VMs off of the Maintenance mode-enabled host to other hosts within the cluster. If you don't have DRS turned on, you can manually migrate VMs to other hosts using VMotion.
Sure, put the host in Maint Mode. Or select one server, hold down the shift key and left click. Right click the group and select migrate. My experience is two transfer at a time, which is fine for our needs. I'm sure there may be a way to script the move, but I'll just share my two pennies.
When you put the host in Maint Mode, all vms have to be powered off. That migration would be a 'cold migration.' VMotion would be a 'live' migration, which is not possible in Maint Mode...
Nope. When you put a host into Maintenance mode, it will prevent powering on additional VMs, and - if you are in a DRS-enabled environment, it will automatically begin using VMotion to migrate VMs off of the Maintenance mode-enabled host to other hosts within the cluster. If you don't have DRS turned on, you can manually migrate VMs to other hosts using VMotion.
Would like to know if there is a way to vmotion
everything off a host at once? Have never really
tried multiple vmotions from 1 host to another host
or multiple host's at one time for fear of time-out's
etc...Also what does relocating VM files even
accomplish? I have tried this and it doesn't seem to
do anything (unlike remove from inventory).
You cannot do it "at once", there is a maximum of 2 concurrent Vmotions per host in VC.
If you do more than that, it will queue up, and continue until finished.
All in all it will happen pretty quick anyway.
\- Anders
See the post from pangchen on http://www.vmware.com/community/thread.jspa?messageID=543377
"Maintenance mode prevents all VMs from being powered on that host. If there are any running VMs, the host cannot go into maintenance mode until the VMs are powered off. "
Message was edited by:
ken.cline@hp.com to remove trailing ? from URL
That is true, with one small caveat. It should read "...until the VMs are powered off or migrated via VMotion to another host[/i]" - basically, a host cannot enter maintenance mode until there are no longer VMs running on it...doesn't matter how you achieve that - you can kill them, or you can move them
This is what I was hoping for...all my farm clusters have DRS enabled, so as long as I can go into maintenance mode and have DRS vmotion all the VM's off onto other host's automatically...good to go, tx
You're set...it's like magic!
I think the VM Forums are like magic...I ask a question and the answers magically appear...Who'd a thunk!
You're set...it's like magic!
During my Install and Config course the instructor revealed the secerets to the VMotion magic trick.
Even now that I know how it's done, I'm still impressed.
I use maint mode all the time for switching out hardware. One thing to remember is make sure there are no hardware dependencies tied to your vm. Example is keeping the physical cd-rom attached.
It will not automatically move when you vmotion it using maint mode. Found that out the hard way. Remember to detach the cd-rom's...
So I'm not ready to test this yet (because we have so many VM's running on 1 host)...if a VM is unable to vmotion off will it warn you before the host goes into maintenance and shuts off the vm???
Correct. It will actually go into maintenance mode but it will not automatically move the vm off. The vm will function fine, but will be stuck on the host until user interaction is completed. The vm will not shut off when you vmotion between two esx host when you have fibre or san storage. If you are vmotion between physical storage on the host and another....you have to shut down the vm's and vmotion through Virtual center.
I use maint mode all the time for switching out
hardware. One thing to remember is make sure there
are no hardware dependencies tied to your vm.
Example is keeping the physical cd-rom attached.
t will not automatically move when you vmotion it
using maint mode. Found that out the hard way.
Remember to detach the cd-rom's...
And the same applies to floppy disk image connections (the CD/Floppy needs only to be disconnected, not unmounted) also watch out for VMs that communicate acroiss an internal only Vswitch (no NIC) attached.
FYI,
If DRS is set to Fully Automated then when you put the host in Maintenance Mode VMs will be automatically moved off. If set to a lower level the VMs will not move, at least this is how it works in my environment.
This explains why none of my VM's would vmotion off a host going into maintenance mode...all my DRS cluster's are set to 4 stars, so they wouldn't move. It has to be set more agressively for it to work...thanks!
Not at all. The number of stars has nothing to do with your problem. The only thing that would cause VMs to not be automatically migrated off the host when entering MM is to have the automation level set to something other than "Fully Automated"
Not at all. The number of stars has nothing to do
with your problem. The only thing that would cause
VMs to not be automatically migrated off the host
when entering MM is to have the automation level set
to something other than "Fully Automated"
Have you tested that? Because I have and my DRS is set to fully automated and at 4 stars it will not vmotion the VM's going into MM.
Still looking for answers