Fault tolerant hyper-converged infrastructure upgrades in an environment with no additional physical infrastructure

A non-transitory computer readable storage medium having computer readable program code stored thereon for causing a computer system to perform a method for upgrading a fault tolerant hyper-converged infrastructure in an environment with no additional physical infrastructure, the method comprising:

• choosing a workload domain to upgrade,
• the workload domain having a plurality of hosts thereon;
• calculating one or more conflict groups for each host of the plurality of hosts;
• selecting a physical host in the workload domain;
• calculating a number and a size of one or more nested hosts;
• creating, in a management cluster, a different nested host for each of the one more conflict groups in the physical host;
• configuring a communication network to enable communication between a virtual machine (VM) on the different nested host and a VM in the physical host;
• putting the physical host into a maintenance mode;
• upgrading the physical host;
• and
• returning the upgraded physical host from the maintenance mode to an operational mode, said method for upgrading said fault tolerant hyper-converged infrastructure providing a seamless upgrade path without requiring disabling of anti-affinity rules, while maintaining domain strength at a level equal to or greater than an original strength of said workload domain, and while preserving anti-affinity rules configured on said workload domain.

A pre-configured hyper-converged computing device for supporting a virtualization infrastructure comprising:

• a plurality of hosts, wherein a host of the plurality of hosts comprises a hypervisor, wherein the plurality of hosts is allocable to workload domains, and wherein hosts allocated to a particular workload domain comprise a hypervisor having a requested hypervisor version;
• and
• a non-transitory computer-readable storage medium encoded with a computer program communicably coupled to a processor to:
• choose a workload domain to upgrade, the workload domain having a plurality of hosts thereon;
• calculate one or more conflict groups for each host of the plurality of hosts;
• select a physical host in the workload domain;
• calculate a number and a size of one or more nested hosts;
• create, in a management cluster, a different nested host for each of the one more conflict groups in the physical host;
• configure a communication network to enable communication between a virtual machine (VM) on the different nested host and a VM in the physical host;
• put the physical host into a maintenance mode;
• upgrade the physical host;
• and
• return the upgraded physical host from the maintenance mode to an operational mode, wherein said computer program communicably coupled to said processor further provides for upgrading said workload domain without requiring disabling of anti-affinity rules, while maintaining domain strength at a level equal to or greater than an original strength of said workload domain, and while preserving anti-affinity rules configured on said workload domain.