Why does HA not power-on VMs after a full cluster shutdown?

I received this question and figured I would write a quick post about it, as it comes up occasionally. Why does vSphere HA no power-on VMs after a full cluster is brought back online after a full cluster shutdown? In this case, the customer had a power outage, so their hosts and all VMs were powered off as a result of … [Read more...]

vCLS VMs not powering on, insufficient resources error

This week I had someone internally me asking about a situation where vCLS VMs were not powering on and an error was thrown stating “insufficient resources”. I had seen this issue before at some point and I knew it had something to do with the VM version and EVC. The details of the error messages seem to … [Read more...]

VMware: The number of heartbeat datastores for host is 0

Today I added some vSphere 5.0 u1 hosts in a new created cluster, the SAN will be delivered next week so I didn’t have central storage, to finish my new cluster setup I configured HA and DRS. After configuring HA I received this warning message:   The number of heartbeat datastores for host is 0, […] … [Read more...]

VMware: Mass change portgroup VM’s in cluster with PowerCLI

Last week I configured for a customer some new VLAN’s and created on each host new vSwitches with new portgroups, to migrate all VM’s in cluster with network label “VM Network” to “Production” I’ve created this script to automate this for all virtual machines with specific network label in cluster: Original situation: … [Read more...]