This walkthrough is part II of a series of guides on installing and configuring VMware’s tools for updating and patching ESXi 4.1 hosts. You can find Part I here and Part III here. The Update Manager Download Service (UMDS) is used in an air-gap environment where the vCenter Update Manager server (VUM) does not have access to the Internet to download patches itself – instead it relies on UMDS to download the patches. Once patches are downloaded, they’re manually copied via removable media, usually a CD/DVD, to VUM. Once VUM has the patches, it then works through the vSphere Client and the Update Manager plug-in to update the hosts. Although VUM can download operating system patches for Windows and metadata for Linux patches, we’re not using this configuration in this guide. We’re assuming the environments are updated via WSUS or SCCM.
So during my first data center virtualization project, I had to write up a series of documents for internal reference. These documents were to help us perform a standard installation at each site we migrate. I thought it would be helpful to post them for anyone else looking to perform these tasks, as well. This series of posts is about VMware Update Manager 4.1U1 and its associated Update Manager Download Service. It appears in three posts because the topic can be logically separated into three steps: installing and configuring VUM, installing and configuring UMDS, and a patching guide once your initial update infrastructure is in place. This post, as you can see, is part I. Let me know if it helps you out or if I missed something. All the best!