I was reading through some posts on the VMTN forums today, and a poster ran into an issue where his network performance dropped significantly after upgrading to ESXi 5. Poster checked through the usual suspects: config changes, speed and duplex on host and switches. Even went through and turned off TCP Offloading on the...
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VCP5 thoughts
After having gone through a few different trainings (Cisco/RHEV/Hyper-V/Oracle OVM), I finally got back to some good ‘ole VMware learning. Went through some docs, and decided to go after VCP5. Glad to say that I did pass, and that the new Version 5 exam is much better a “test” than version 4 was, at...
R900 LINT1 ESXi 5 PSOD
“The system has found a problem with your machine and can not continue. LINT1 motherboard interrupt. This is a hardware problem; please contact your hardware vendor.” Now this system was just running software, so I didn’t believe that there was a hardware issue, per se. So, next step, I went through the tedious process...
Red Hat Enterprise Linux (RHEL) Clustering and VMware Fencing
Red Hat has finally released a supported method to fence RHEL cluster nodes running on top of ESX hosts. You need to be running 5.7, but it is finally officially supported, see support matrix here. Now this has been a sticking point to running Red Hat cluster inside of a VMware ESX cluster now...
Updating ESXi When Update Manager, vihostupdate, esxupdate all fail
I recently had the great honor of upgrading several ESX 3.5 hosts to the latest 4.1 release. This typically would not be such a chore, thanks to Update Manager, but these hosts were installed quite some time ago, and never updated after the fact. So, I attempted to perform the typical update procedure, and...
PowerShell / PowerCLI script to find CPUs/Memory/Disk Allocated and Free
I wrote this script a little while ago to see how much disk space I was actually using inside of my virtual machines. While I was at it, I included the allocated CPU and Memory. With the new proposed licensing model for vSphere 5, it seemed to gain some more life. Seems pretty appropriate...
Sending Syslog to vMa, and What Comes Next
Having more than a handful of servers to deal with, it is more than a little helpful to have logs in one place. That way, you can log in to one location, and parse through logs to your heart’s content. One thing that gets a bit difficult to do, however, is event correlation. Sure,...
When is a Down Switch NOT Really Down?
Now, after the 4th/5th time running into this predicament, I thought I’d share with others. The first time, maybe two, we thought we may have run into some small anomaly. After the 3rd time, there had to be some bug. Now, after moving to new equipment, we’re at a bit of a loss. Last...
Moved Servers
After 1 year, I decided I wanted a few more features than the basic wordpress.com was allowing me, so I’ve moved. Takes a lot more than I initially thought, but I’m about as setup as I’m going to be. At least for now. Hopefully, all goes well, and I don’t mess up links. My...
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