Wednesday, September 30, 2009

Gmail's Evil account lockout tool Captcha

Gmail's Evil account lockout tool, a great link for those of us who have google apps for email and have ever had gmail lock you out of your account for trying 1 bad password.

Tuesday, September 22, 2009

So you've decided to add another nic to openfiler 2.3

here is the easy way (unless it auto detects, cause that's easier)

Go into /etc/modprobe.conf

Setup the eth2,3,4, whatever just like eth0,1 whatever

go into /etc/sysconfig/network-scripts

cp ifcfg-eth1 ifcfg-eth2(new interface)

open it, modify the following lines
so you don't have conflicts

save it, reboot, you should now see it in your UI

Saturday, September 19, 2009

Openfiler 2.3 intel nics disappear after applying updates

I noticed that with openfiler 2.3 my nics disappeared after applying the updates. Turns out there is a linux kernel update that changes the Nics from e1000 to e1000e .

To get these nics back, just modify your /etc/modprobe.conf and change your eth0 to e1000e from e1000.

Reboot and it should be back to a-ok

Friday, September 18, 2009

Passed the VCP4 (vcp410) exam today

I got an instructor level score, but that thing isn't easy. It's probably the most bizzare test i've ever taken. Most of the questions look like this:

You did X horribly wrong and against all best practices and recommendations.

Now you want to do Y.

What happens?

I dunno..I never did X wrong, so Y always works?

I'm just glad its over.

Tuesday, September 15, 2009

HP ESX Management Agent Cheat Sheet

To diagnose a hardware problem on an HP Server with ESX and the HP software agent installed run


then you can do commands such as
show dimm
show iml
show ?

Monday, September 14, 2009

Tips for VCP 410 Exam

1) Buy this book Mastering VMware vSphere 4

2) Read this document vSphere Admin Guide

3) Read the vSphere Maximums PDF

4) Read the SAN Setup Guide

5) Read the VMWare forums.

6) Read every PDF from about vSphere you can find.

7) Do installs, do upgrades (every method), Setup and try all the new features. You will find vSphere 4 to be a much bigger upgrade to 3.5 than you'd expect.

If you do vSphere all day long, you will fail this test (I do and I did the first time). You must read the forums and get involved in the VMWare community. They will throw some insane questions at you that any decent admin would never encounter, the ONLY way to know the answers to these is to read the forums for obscure issues bad admins have run into by setting up their ESX servers and vCenters incorrectly.

Study hard and good luck.

Friday, September 11, 2009

Build a ESX 4 Host

1) Install, take defaults, make swap partition 1600MB or just round up to 2GB
2) Setup/Configure -
Service Console Memory - 800MB
System Reserve - 1500mhz
Patch ESX
Install hardware (HP) Agents
Use Host Profiles to do all (or most) this if you can.

Hey look Email's aren't being delivered

I see an error when I Telnet to SMTP Exchange 2007 of 452 4.3.1 Insufficient system resources

The answer..

Apparently Ex2007 SMTP must have at least 1GB of free space or it gives that error and stops working.

Thursday, September 10, 2009

Vizioncore's best practices for ESX host setup

ESX Host Configuration
vReplicator 2.5 uses the ESX Service Console to control replication and also uses VMware snapshot
technology. By default, the ESX Service Console is significantly resource constrained, which can impact
the performance of replication and snapshots3.
For best performance of replication and VMware snapshot operations, increase the memory allocation
of the Service Console to 800MB and CPU Reservation to 1500 MHz. You can configure these settings
through the VMware Infrastructure Client on the Configuration tab of each ESX host. The settings are
under “Memory” and “System Resource Allocation”.
The ESX Service Console should have a dedicated4 1Gbps network interface assigned to ensure adequate
bandwidth for replication. Sharing a network card between the service console and virtual machine
network can impact on replication performance.