Author: John Borhek
John Borhek

About John Borhek

John Borhek (VCP 3-6.5) is the IT Director and Lead Solutions Architect at VMsources Group Inc. and an active consultant specializing in VMware vSphere, Linux, Networking and Infrastructure Design.

Diagnosing and fixing Virtual Machine Remote Console MKS problems

vCenter_client_connectionsVirtual Machine Remote Console (VMRC) issues, also known as MKS Errors, seem to be more and more common these days. The causes and solutions to most of these problems are the same for the large-scale user of vSphere Enterprise Plus as they are for the home-lab user on a trial license. It usually boils down to one fulcrum: The client (vSphere Client for Windows or the Web Client) does not “see” your vSphere Cluster the same way that vCenter “sees” all of the ESXi Hosts. Try to answer the following questions, and then we’ll get started with diagnosis. Continue reading

VMware vSphere 6 is finally ready!

Unlike in previous releases, VMware took a good long time getting vSphere 6 ready. For the first time ever, VMware made the Beta version of vSphere 6 publicly available (all you had to do was sign-up) and was actively soliciting input on the Beta forums.

The initial public release of vSphere 6 (3/12/2015) was, nonetheless, plagued with at least one critical issue and several annoyances. The most critical issue affecting vSphere 6 was that Changed Block Tracking (CBT) appeared to be essentially broken, rendering most forms of backup using the vSphere API for Data Protection useless[1]. This and other less significant issues rendered the initial release of vSphere 6 unsuitable for use in production environments, and I recommended that all users hold off on upgrading until these issues had been resolved. Continue reading

Cloud permissions for VMware vSphere (Roles, Privileges and Permissions)

VMware vSphere offers powerful native tools to manage users’ access to resources in a vSphere environment. Administrators may create custom Roles that are composed of one or more granular Privileges. Each Privilege is the most granular right that can be ascribed within vSphere, such as the ability to power-on a virtual machine (NOTE: power-off is a separate privilege!). Continue reading