Solved

VMware 5.5 HA and Host Isolation question

Posted on 2015-02-20
2
387 Views
Last Modified: 2015-02-26
Hello all,

I hope you can help me understand HA and host isolation. I had a situation where a host was connected to a non-redundant network and lost both LAN and management network access at the same time.

The VMs did not shut down and restart on another host - now apparently this is normal as the host still had iscsi/storage access therefore VMs did not need to shut-down - please can you let me know if this is correct?

Host isolation response is configured to shut down VMs, what sort of failure needs to occur to make the host isolated so VMs power off and restart elsewhere?

Many Thanks,
0
Comment
Question by:Nolan Gustavo
2 Comments
 
LVL 7

Accepted Solution

by:
Shahnawaz Ahmed earned 500 total points
ID: 40621135
Dear MarkFogel,

VMware HA works on Master Slave architecture which works on Heartbeat packets

Scenario 3 node HA cluster (1 Master & 2 Slaves)  =>

 Master Action :-
 IF master doesn't receive heart beat packet from slave then Master check the lock in the storage if lock exist then no action reuired.

Slave Action :-
1) If Slave doesn't receive heartbeat from master so it try to participate in the election & same slave unable to talk to another slave then it becomes master & check protected list of Vcentre. When this slave found that protected list is on Then no Action required.
2) Now isolated slave try to ping Gateway (Network Isolation Address) if unable to ping NIA (Network Isolation Address) then slave takes the action
A) Leave Power ON
B) Shutdown
C) Power off

The VMs did not shut down and restart on another host - now apparently this is normal as the host still had iscsi/storage access therefore VMs did not need to shut-down - please can you let me know if this is correct?

This is correct
0
 
LVL 1

Author Comment

by:Nolan Gustavo
ID: 40621306
Thanks for the quick response
How can I find out if the host was a master or slave at the time if failure?
Also point number 2, if LAN and management networks were down this host would have not been able to ping NIA how come it did not shut down the VMs?
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

Suggested Solutions

In this article, I will show you HOW TO: Perform a Physical to Virtual (P2V) Conversion the easy way from a computer backup (image).
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
This tutorial will walk an individual through configuring a drive on a Windows Server 2008 to perform shadow copies in order to quickly recover deleted files and folders. Click on Start and then select Computer to view the available drives on the se…
This video shows you how to use a vSphere client to connect to your ESX host as the root user. Demonstrates the basic connection of bypassing certification set up. Demonstrates how to access the traditional view to begin managing your virtual mac…

777 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