Solved

VMware isolation

Posted on 2014-03-24
15
297 Views
Last Modified: 2014-06-08
I have read a little about isolation response and I was hoping to get some suggestions on a few things.

First, I have a cluster with two hosts in it With HA turned on.  Second, one of the hosts will stop responding and the only thing I can do is to physically reboot the host to get it back.  It will not respond to a ping or anything else once this has happened.

I have read about putting in a secondary isolation ip address for the cluster and also increasing the failure detection time.  Are these two things pretty safe to implement without any bad side effects?

Also, could there be a false positive that is causing an isolation of one of my VMware hosts?

I have had this happen in the past and it seemed to be related to our shared storage devices.  Please help!!  I have been struggling with this same problem for a while now and nothing seems to fix.  Thanks experts!!!
0
Comment
Question by:IKtech
  • 8
  • 7
15 Comments
 
LVL 61

Expert Comment

by:gheist
ID: 39951634
I am sorry - HA just stops when hosts are isolated, VMs continue running on them.
0
 
LVL 3

Author Comment

by:IKtech
ID: 39951695
can I adjust any settings to keep the host isolation from happening?
0
 
LVL 61

Expert Comment

by:gheist
ID: 39951714
Are you isolating VM network and vmkernel network on different nics as per best practices?
0
 
LVL 3

Author Comment

by:IKtech
ID: 39951738
yes, I believe so.
0
 
LVL 61

Expert Comment

by:gheist
ID: 39952524
Can I see how vswitches picture look in your ESXi (with whatever reminds of your organisation like net numbers or names blurred)?

Also what is your network switches' make and model
(some need configuring cache time and forward delay to make vmotion and HA happy - i.e if you have 3 switches between your ESXis it could just happen that gratuitous arp message is lost and one of them lives with belief that VM is still at other ESXi)
0
 
LVL 3

Author Comment

by:IKtech
ID: 39953717
both hosts are setup identical as far as the vswitches go.  Just some different IP addresses.  I can upload the second host config if you like.
vmware-host-not-responding.PNG
0
 
LVL 61

Expert Comment

by:gheist
ID: 39953763
vmotion and storage are heavy.. which vmkernel ports storage uses? does host get offline when you copy huge file?
0
U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 
LVL 3

Author Comment

by:IKtech
ID: 39954076
it does seem to happen when shared storage is working hard.  The last few times I have had trouble with this, I had a bad hard drive on one of my storage devices.  I am using QNap devices with 4 drives each with RAID 10.  I am doing block scans and smart tests on the drives to see if I can find an issue with a drive.  Also I am looking into getting new drives that are 6gb/s and 10k rpm vs. what I have now, 3gb/s and 7200rpm.
0
 
LVL 61

Expert Comment

by:gheist
ID: 39954125
3Gb/s could very well saturate 1Gb/s FT logging interface.
0
 
LVL 3

Author Comment

by:IKtech
ID: 39954388
I am currently not using any FT as a trouble shooting step and it still happens.
0
 
LVL 61

Expert Comment

by:gheist
ID: 39954482
Try altering between fixed media speed and auto-select...

Do you have two isolation hosts and they are all the time up?
0
 
LVL 3

Author Comment

by:IKtech
ID: 39967011
are you talking about the switch ports the vm host is connected to for the fixed media speead and the auto select?

I just have two hosts and yes they are up all the time.  Are there some settings I can verify to check with one or if both are isolation hosts?

Thanks!
0
 
LVL 61

Expert Comment

by:gheist
ID: 39967195
You need to check all interfaces on storage switch. If one of them goes doen at least one host is isolated.
0
 
LVL 3

Accepted Solution

by:
IKtech earned 0 total points
ID: 40109534
i have switched to faster drives in one storage device and I also had a drive failure in one storage device.  After the change to faster drives and rebuild the raid array on the other storage device I have not had any issues.  I may just change to faster drives on the second storage device at some point, but so far so good.  Looks like a bad hard drive causing me issues again.  Thanks for the help
0
 
LVL 3

Author Closing Comment

by:IKtech
ID: 40120216
replacing a bad drive seems to have fixed it for now.
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When we have a dead host and we lose all connections to the ESXi, and we need to find a way to move all VMs from that dead ESXi host.
In this article, I will show you HOW TO: Create your first Windows Virtual Machine on a VMware vSphere Hypervisor 6.5 (ESXi 6.5) Host Server, the Windows OS we will install is Windows Server 2016.
Teach the user how to configure vSphere Replication and how to protect and recover VMs Open vSphere Web Client: Verify vsphere Replication is enabled: Enable vSphere Replication for a virtual machine: Verify replicated VM is created: Recover replica…
Teach the user how to install log collectors and how to configure ESXi 5.5 for remote logging Open console session and mount vCenter Server installer: Install vSphere Core Dump Collector: Install vSphere Syslog Collector: Open vSphere Client: Config…

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now