If there are any VMware add-ons or plugins installed, check their compatibility by using the VMware Compatibility Matrix.Follow this vSphere upgrade order, otherwise you can lose the connection between an ESXi host and vCenter. If you need to update ESXi to ESXi 7.0 Update 2 in vCenter, you need to update vCenter or deploy vCenter 7.0 Update 2 first. Thus, you have to upgrade vCenter first and only then proceed to the ESXi upgrade if you want to upgrade vSphere 6.7 to 7.0. VMware vCenter 7.0 can manage ESXi 7.0, ESXi 6.7 and ESXi 6.5, but vCenter 6.7 cannot manage ESXi 7.0 hosts. If an ESXi host is managed by vCenter Server, the vCenter version must be the same as the target version of ESXi after the upgrade or higher.There must be enough free storage space for the ESXi upgrade.

There must be no running VMs on an ESXi host when you start the ESXi upgrade process.

If an unsupported device is present, such as an old unsupported CPU or disk controller, the ESXi upgrade will not be applied to the server.

The hardware of the server running ESXi 6.7 must be compatible with ESXi 7.0, that is, it must meet the hardware requirements for ESXi 7.0.

This blog post explains how to upgrade from ESXi 6.7 to ESXi 7.0 in your vSphere environment using ESXi 7.0 Update 2 for demonstration purposes. Otherwise, proceed with a clean installation of ESXi 7.0. For example, upgrade first to version 6.5 and then to version 7.0. If you’re using ESXi 6.0 or earlier in your vSphere environment, you can upgrade in several steps. You don’t need to perform a clean installation of ESXi 7.0 on servers running ESXi 6.5 or ESXi 6.7 as you can directly upgrade to v7 from these two versions. The ESXi hypervisor is a main component of vSphere, and for a vSphere upgrade, you should do a VMware vCenter upgrade and a VMware ESXi upgrade.

VMware vSphere 7, the latest release of VMware’s virtualization platform, introduces a number of useful features, and many companies are looking forward to upgrading from vSphere 6.7 to 7.0. By Michael Bose How to Upgrade from VMware vSphere ESXi 6.7 to 7.0

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