Enabling VLAN on PureFlex for ESXi servers

VforVirtualist

The IBM PureFlex System offering combines storage, networking, virtualization, and management into a single infrastructure. More information about IBM PureFlex System can be here Through this guide we will go through the creation of VLAN on PureFlex switches [EN4093 & G8264-TOR] then we will configure it on the vSphere side.… Continue reading

Customized “embedded” version of ESXi need patching

VforVirtualist

IBM, HP, DELL are releasing its own customized “embedded” versions of ESXi which contain vendor specific drivers, opened firewall ports for their management solutions, etc. Patches are different for each ESXi version 5.0, 5.1, 5.5. I will show you how to download and implement those patches for IBM x3850 X5,… Continue reading

Centralized syslog server for vSphere environment with CentOS 7 and rsyslog

Couple of years ago we were asked to provide a working solution for centralized syslog collector. My customer had very tough security rules, and they were strictly against any appliance based, out of the box solution. They needed to have full control over the OS and applications installed. The main… Continue reading

Design considerations for Virtual Machine Time Synchronization

  Here are some guidelines and considerations related to time synchronization for your Virtual Machines design. It seems to be a simple topic and covered well online, however I think it deserves a better attention as I’ve seen  huge complications in some environments caused by misunderstanding and miss-configuration. Design Decision:… Continue reading

Manually remove ESXi host from vCenter database

VforVirtualist

Some time ago, after I tried to remove ESXi host from vCenter it was still appearing in vSphere client with alert and I couldn’t remove it again. Someone would say it is just cosmetic issue, but for example storage service was failing from initializing because of it too. VMware support… Continue reading