Category Archives: ha

vSphere HA Restart Priority


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I’ve seen more and more questions popping up about vSphere HA Restart Priority lately. I figured I would write something about it. I already did in this post about what’s new in vSphere 6.5 and I did so in the Stretched Cluster guide. It has always been possible to set a restart priority for VMs, […]

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Posted in 6.5, BC-DR, ha, High Availability, restart, vSphere | Comments

Insufficient configured resources to satisfy the desired vSphere HA failover level


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I was going over some of the VMTN threads and I noticed an issue brought up with Admission Control a while ago. Completely forgot about it until it was brought up again internally. With vSphere 6.5 and vSphere HA there seems to be a problem with some Admission Control Policies. When you for instance have […]

Insufficient configured resources to satisfy the desired vSphere HA failover level” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, ha, Storage, Various, vSphere, vsphere ha | Comments

Insufficient configured resources to satisfy the desired vSphere HA failover level


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I was going over some of the VMTN threads and I noticed an issue brought up with Admission Control a while ago. Completely forgot about it until it was brought up again internally. With vSphere 6.5 and vSphere HA there seems to be a problem with some Admission Control Policies. When you for instance have […]

Insufficient configured resources to satisfy the desired vSphere HA failover level” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, ha, Storage, Various, vSphere, vsphere ha | Comments

Using HA VM Component Protection in a mixed environment


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I have some customers who are running both traditional storage and vSAN in the same environment. As most of you are aware, vSAN and VMCP do not go together at this point. So what does that mean for traditional storage, as in with traditional storage for certain storage failure scenarios you can benefit from VMCP. […]

Using HA VM Component Protection in a mixed environment” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, 6.6, apd, ha, PDL, Server, Software Defined, Storage, Various, Virtual SAN, vmcp, VMware, vsan, vsphere ha | Comments

vSphere HA heartbeat datastores, the isolation address and vSAN


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I’ve written about vSAN and vSphere HA various times, but I don’t think this has been explicitly called out before. Cormac and I were doing some tests this week and noticed something. When we were looking at results I realized I described it in my HA book a long time ago, but it is so […]

vSphere HA heartbeat datastores, the isolation address and vSAN” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.0, 6.5, 6.6, ha, Server, Software Defined, Storage, Virtual SAN, vsan, vSphere | Comments

The difference between an isolation and a partition with vSphere


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I have a lot of discussions with customers on the topic of stretched clusters, but also regular vSphere clusters. Something that often comes up is the discussion around what happens in an isolation or partition scenario. Fairly often customers (but also VMware employees) use those words interchangeably. However, a partition is not the same as […]

The difference between an isolation and a partition with vSphere” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in drs, ha, Server, VMware, vsan, vSphere | Comments

Can you use the management IPs as the isolation address for HA?


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There was a question on VMTN this week about the use of the management IP’s in a “smaller” cluster as the isolation address for vSphere HA. The plan was to disable the default isolation address (default gateway) and then add every management IP as an isolation address. In this case 5 or 6 IP’s would […]

Can you use the management IPs as the isolation address for HA?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, ha, High Availability, VMware, vSphere | Comments

Where’s the HA enforce VM-Host and Affinity rules option in vSphere 6.5?


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Last week on (VMware internal) Socialcast someone asked where the UI option is in vSphere 6.5 that allows you to enable the ability for vSphere HA to respect VM-Host Affinity and VM-VM Anti Affinity rules. In vSphere 6.0 there is an option in the Rules part of the UI as shown in the screenshot below. In […]

Where’s the HA enforce VM-Host and Affinity rules option in vSphere 6.5?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, BC-DR, ha, High Availability, Server, vSphere | Comments

VM showing that HA failure response is disabled in 6.5?


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I had a customer asking me today why on each VM it was showing that all HA responses are disabled. This customer is running vSphere 6.5 and below you can see what the UI showed. Note that it still says the VM is Protected, yet none of the protection mechanisms appeared to be enabled I […]

VM showing that HA failure response is disabled in 6.5?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in 6.5, BC-DR, ha, Server, VMware, vSphere, vsphere ha | Comments

HA disabled VMs not registered on other hosts after failure?


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A couple of weeks ago one of our SEs asked me about vSphere HA functionality that was introduced a while ago, which is the ability to have HA disabled VMs being registered on other healthy hosts in a cluster after a failure. Not only does this apply to “HA disabled VMs” but also to powered-off […]

HA disabled VMs not registered on other hosts after failure?” originally appeared on Yellow-Bricks.com. Follow me on twitter – @DuncanYB.

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Posted in BC-DR, ha, High Availability, vSphere | Comments