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5 Replies Last post: Jul 30, 2009 8:06 AM by msemon1  

DRS Rules not working? posted: Jul 29, 2009 11:24 AM

Click to view juchestyle's profile Master
juchestyle
1,357 posts since
Jun 20, 2005

Has anyone run into a situation where the DRS rules were not working? I have a rule that keeps 1 vm seperate from all others. I logged in today to find that two other vms were now hanging out with the VIP. I could not figure out why this was happening. I tried restarting the VC agent, no go, I rebooted all the hosts in the cluster one at a time, and still no go. I deleted the rule and recreated it, no go. I rebooted VC and no go.

Ideas, suggestions, anything else?

Matthew

Kaizen!

Tags: rules, not, working

Re: DRS Rules not working?

1. Jul 29, 2009 11:59 PM in response to: juchestyle
Click to view AndreTheGiant's profile Guru
AndreTheGiant
5,916 posts since
Aug 28, 2008
How can you make a anti-affinity rule to separate 1 VM to all the other?
You can only make anti-affinity rule to separate all VMs listed.

Andre

Re: DRS Rules not working?

2. Jul 30, 2009 12:47 AM in response to: juchestyle
Click to view Sandeepka's profile Hot Shot
Sandeepka
152 posts since
Oct 29, 2008

What you can do is:

Create affinity rule to keep all the VMs except the one VM.

Create anti-affinity rule to separate the one VM and any of the other VMs.

Hope this works

-Sandeep

Re: DRS Rules not working?

3. Jul 30, 2009 6:35 AM in response to: Sandeepka
Click to view juchestyle's profile Master
juchestyle
1,357 posts since
Jun 20, 2005

For the sake of a short explanation, we have about 20 rules, the VIP is in each of those rules and one of the other vms is there as well, one rule for each vm in that cluster. Luckily it isn't a big cluster.

But anyway, anyone ever run into a situation where the DRS rules stop working? I ended up rebooting vCenter and this seemed to resolve the issue.

Matthew

Kaizen!

Re: DRS Rules not working?

4. Jul 30, 2009 7:17 AM in response to: juchestyle
Click to view azn2kew's profile Champion
azn2kew
2,941 posts since
Jun 21, 2006
I thought you rebooted the vCenter server and didn't seems to work so how does it work on second shot? hhmmm.....maybe your rules are conflicting with each other's rules by chance I haven't seen anything like that....DRS is VMware butter/bread so they can't screw it up you know....and it seems to do really good job for our large clusters. I would double check your rules or read more about http://www.vmware.com/pdf/vmware_drs_wp.pdf would help understand DRS more better.

If you found this information useful, please consider awarding points for "Correct" or "Helpful". Thanks!!!

Regards,

Stefan Nguyen
VMware vExpert 2009
iGeek Systems Inc.
VMware, Citrix, Microsoft Consultant

Re: DRS Rules not working?

5. Jul 30, 2009 8:06 AM in response to: juchestyle
Click to view msemon1's profile Hot Shot
msemon1
292 posts since
Apr 5, 2005

Seems to me there was a problem when creating a lot of rules for DRS. VMware warns not to create too many because of the overhead on Virtual Center. Not sure what the magic number is, however, what you are saying makes sense because you restarted VC and the DRS rules began to work.

Mike

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