Category Archives: ha

I want vSphere HA to use a specific Management VMkernel interface


Advertise here with BSA

This comes up occasionally, customers have multiple Management VMkernel interfaces and see vSphere HA traffic on both of the interfaces, or on the incorrect interface. In some cases, customers use the IP address of the first management VMkernel interface to connect the host to vCenter and then set an isolation address that is on the […]

The post I want vSphere HA to use a specific Management VMkernel interface appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, ha, High Availability, Server, VMware, vSphere | Comments Off on I want vSphere HA to use a specific Management VMkernel interface

vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster


Advertise here with BSA

I received two questions this week around partition scenarios where after the failure has been lifted some VMs display the error message “vSphere HA virtual machine failed to failover”. The question that then arises is: why did HA try to restart it, and why did it fail? Well, first of all, this is an error […]

The post vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster appeared first on Yellow Bricks.

Continue reading

Posted in 6.0, 6.5, 6.7, BC-DR, failure scenario, ha, Server, testing, VMware, vSphere | Comments Off on vSphere HA virtual machine failed to failover error on VMs in a partitioned cluster

HA Admission Control Policy: Dedicated Failover Hosts


Advertise here with BSA

This week I received some questions on the topic of HA Admission Control. There was a customer that had a cluster configured with the dedicated failover host admission control policy and they had no clue why. This cluster had been around for a while and it was configured by a different admin, who had left […]

The post HA Admission Control Policy: Dedicated Failover Hosts appeared first on Yellow Bricks.

Continue reading

Posted in admission control, BC-DR, failover host, ha, Server, vSphere | Comments Off on HA Admission Control Policy: Dedicated Failover Hosts

This host has no isolation addresses defined as required by vSphere HA


Advertise here with BSA

I had a comment on one of my 2-node vSAN cluster articles that there was an issue with HA when disabling the Isolation Response. The isolation response is not required for 2-node as it is impossible to properly detect an isolation event and vSAN has a mechanism to do exactly what the Isolation Response does: kill the […]

The post This host has no isolation addresses defined as required by vSphere HA appeared first on Yellow Bricks.

Continue reading

Posted in 6.5, 6.7, ha, isolation address, isolation response, Server, vsan, vsphere ha | Comments Off on This host has no isolation addresses defined as required by vSphere HA

Black Friday Gift: Free copy of the vSphere 6.7 Clustering Deep Dive, thanks Rubrik (ebook)


Advertise here with BSA

Many asked us if the ebook would be made available for free again. Today I have the pleasure of announcing that Frank, Niels and I have worked once again with Rubrik and the VMUG organization to make the vSphere 6.7 Clustering Deep Dive book available for free! Yes, that is 0 USD / EURO, or […]

The post Black Friday Gift: Free copy of the vSphere 6.7 Clustering Deep Dive, thanks Rubrik (ebook) appeared first on Yellow Bricks.

Continue reading

Posted in 6.7, clustering, clustering deep dive, deep dive, drs, ebook, ha, rubrik, Server, Various, vSphere | Comments Off on Black Friday Gift: Free copy of the vSphere 6.7 Clustering Deep Dive, thanks Rubrik (ebook)

HA Futures: Per VM Admission Control – Part 4 of 4 – (Please comment!)


Advertise here with BSA

As admission control hasn’t evolved in the past years, we figured we would include another potential Admission Control change. Right now when you define admission control you do this cluster-wide. You can define you want to tolerate 1 failure for instance, but some VMs simply may be more important than other VMs. What do you […]

The post HA Futures: Per VM Admission Control – Part 4 of 4 – (Please comment!) appeared first on Yellow Bricks.

Continue reading

Posted in drs, futures, ha, Server | Comments Off on HA Futures: Per VM Admission Control – Part 4 of 4 – (Please comment!)

HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)


Advertise here with BSA

VMCP, or VM Component Protection, has been around for a while. Many of you are probably using this to mitigate storage issues. However, what if the VM network fails? Well, that is a problem right now… if the VM network fails then there’s no response from HA. This by many customers is considered to be […]

The post HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!) appeared first on Yellow Bricks.

Continue reading

Posted in futures, ha, Server, vSphere | Comments Off on HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)

HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)


Advertise here with BSA

VMCP, or VM Component Protection, has been around for a while. Many of you are probably using this to mitigate storage issues. However, what if the VM network fails? Well, that is a problem right now… if the VM network fails then there’s no response from HA. This by many customers is considered to be […]

The post HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!) appeared first on Yellow Bricks.

Continue reading

Posted in futures, ha, Server, vSphere | Comments Off on HA Futures: VMCP for Networking – Part 3 of 4 – (Please comment!)

HA Futures: Admission Control – Part 2 of 4 – (Please comment, feedback needed!)


Advertise here with BSA

Admission Control is always a difficult topic when I talk to customers. It seems that many people still don’t fully grasp the concept, or simply misunderstand how it works. To be honest, I can’t blame them. It doesn’t always make sense when you think things through. Most recently for Admission Control we introduced a mechanism […]

The post HA Futures: Admission Control – Part 2 of 4 – (Please comment, feedback needed!) appeared first on Yellow Bricks.

Continue reading

Posted in admission control, futures, ha, Server, Various, vSphere | Comments Off on HA Futures: Admission Control – Part 2 of 4 – (Please comment, feedback needed!)

HA Futures: Orchestrated Restart and Restart Priority – Part 1 of 4 – (Please comment!)


Advertise here with BSA

Last week I visited Palo Alto. I had a long conversation with my friends from the vSphere HA team. I have done a series of articles in the past asking for feedback/comments on future features/functions of HA that the team is looking to implement. One of the first features I would like to discuss is […]

The post HA Futures: Orchestrated Restart and Restart Priority – Part 1 of 4 – (Please comment!) appeared first on Yellow Bricks.

Continue reading

Posted in features, futures, ha, Server, vSphere | Comments Off on HA Futures: Orchestrated Restart and Restart Priority – Part 1 of 4 – (Please comment!)