?
Solved

VMware 5.5 HA and Host Isolation question

Posted on 2015-02-20
2
Medium Priority
?
416 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 8

Accepted Solution

by:
Shahnawaz Ahmed earned 2000 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

Secure Your WordPress Site: 5 Essential Approaches

WordPress is the web's most popular CMS, but its dominance also makes it a target for attackers. Our eBook will show you how to:

Prevent costly exploits of core and plugin vulnerabilities
Repel automated attacks
Lock down your dashboard, secure your code, and protect your users

Question has a verified solution.

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

If you ever consider purchasing any Daossoft Software Products, DON'T expect any meaningful support - This article should convince you why!
Giving access to ESXi shell console is always an issue for IT departments to other Teams, or Projects. We need to find a way so that teams can use ESXTOP for their POCs, or tests without giving them the access to ESXi host shell console with a root …
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…

762 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