These virtual machines are not running.

Following a power outage virtual machines that are not running display the alert icon.  There are no triggered alarms listed. Environment:  EVC cluster of ESXi 5.0.0 hosts with HA and DRS enabled. Any of the following actions resolve the issue:…

Getting started with Puppet Enterprise

It all starts with a request for ‘a couple’ of Linux server to be set up, which is duly built manually and managed individually. Pretty soon you get a request for some more servers and before long you find that…

So many VMworld session, so little time! It is as always a good idea to plan your VMworld sessions in advance. Some of the sessions will likely be very popular so do not delay in setting up your schedule. Don’t…

VMworld 2012 Europe

VMworld 2012 is almost upon us. I have registered for the Europe conference which will take place in Barcelona from October 9 to 11. The company I work for is sponsoring me, and two guys in our California office who…

Adding a new SAN LUN to ESXi 5 hosts

In the previous post we looked at creating a LUN on an EMC CX4 SAN. Now we are ready to make the storage available to our fiber connected hosts. Here’s a pic of my fiber switches where the ESXi hosts…

Creating a LUN on an EMC CX4 SAN

Let’s take a high-level look at setting up a LUN on an EMC CLARiiON CX4 SAN so that we can expose the storage to a fiber-connected ESXi host. Browse to the Unisphere logon screen After logging in select your system…

How to set up a shell script to monitor load averages

Here is a handy bash script that can be used to send email notifications when a specific server is under high load. In the event that there is no other monitoring solution in place this script can be scheduled as…

Setting up an Amazon AWS elastic load balancer

If you have multiple Amazon AWS instances that require load balancing you can set this up quite quickly in the management console. The benefit of having a load balancer is that you can have a single point to connect to,…

A look at CrunchBang Linux

I’ve done quite a bit of severe distro-hopping to find a reasonable distro to use on an old Dell XPS M1330, which is my work laptop at the moment. I eventually figured out that I would like something light-weight but…

Say your server is low on disk space and you have a large amount of old log files that can be deleted to free up some space. You only want to delete files older than i.e. 20 days. mtime +20…