Posts

It’s a pretty common best practice to not install the Infrastructure Master (FSMO) Role on a Global Catalog Server. This post should help to explain why that is, and the circumstances where you can get away with it. Global Catalog Review A Global Catalog contains a full set of attributes for the domain that it’s a member of and a subset of information for all domains in its forest. So basically, what this means is that all of the little attributes that are stored on objects in Active Directory, in the GC’s domain, will be housed on Global Catalog servers. The global Catalog will also have a replica of the objects from other domains in the forest, but only a smaller set of their attributes. ...

While I was studying for the VCAP-DCA I realized that many people might not have access to a lab that includes the capability to do VMDirectPath I/O. My own lab is using nested ESXi hosts inside of VMware Workstation so I don’t have access to DirectPath either, but I was able to borrow some equipment in order to test my skills. If you don’t have access to this type of equipment but want to study for the VCAP5-DCA, the below setup should suffice for you to learn it, as the setup is not very difficult. ...

I was recently helping out a company attempt to upgrade their Netapp Filer from OnTap 7.3 over to Data OnTap 8. We ran the Netapp Upgrade advisor and got to a section that wanted us to run the AggrSpaceCheck tool to make sure that the aggregates had sufficient space available. Normally, I skip this step because I usually have plenty of space available, but in this particular case, some of the aggregates were already 99% full. Since we didn’t want to have a serious failure during our upgrade we decided to error on the side of caution (and best practices) and run the AggrSpaceCheck tool. ...

Setting up a disaster recovery site can be a costly endeavor. VMware Site Recovery Manager has made disaster recovery much simpler, but it’s still expensive to get a DR site up and going. Rack space, power, cooling, bandwidth, storage and compute can all add up pretty quickly, not to mention that hopefully you’ll never have to use this equipment. Replication Bandwidth Bandwidth could be very expensive depending on how much data needs to be replicated. Consider some of these techniques to make the best use of your bandwidth. ...

I recently presented my current employers DR Strategy at the Chicago Vmug and had several comments about the gotchas section so I thought I’d get them on the blog for future reference. During our DR Test we found several items that need to be carefully considered when doing a failover to a secondary site. It is my hope that this post provides a good starting point for considering your own DR Strategy using VMware Site Recovery Manager. ...

vSphere AutoDeploy always seemed like a lot of work to setup just to deploy a few VMware hosts, but in my current job I don’t setup hosts very often. If you are constantly deploying new hosts to get out in front of performance issues, or are building a new datacenter and deploying many hosts at once, AutoDeploy can be a great way to get up and running quickly. Prerequisites In order to use AutoDeploy, you’ll first need vSphere5, the AutoDeploy Install (which is on the vCenter Media), the vSphere5 Offline Bundle, PowerCLI, a DHCP Server and a TFTP server for starters. ...

You never know when you’ll need to script something and PowerCLI gives you the tools to do it. I decided to see if I could script some of the VMware Update Manager (VUM) tasks while I was reviewing section 5.2 of the VCAP5-DCA Beta Blueprint and found that the procedures were quite easy. My next thought was, “Why would I want to script this when I can use the GUI, and on top of that I can schedule scans and remediation already?” My answer was, “You never know.” Who knows when you’ll need to use the PowerCLI to accomplish a task. Maybe, you’re scripting something so someone else can run it without really knowing how to perform the task, or you’re trying to get a report, or who knows. ...

Unlike many operating systems, VMware ESXi gives you a nice tool to upgrade their hypervisor to the latest version. VMware Update Manager gives you the ability to grab the latest build and apply it to your existing ESXi hosts. I should mention that VMware Update Manager is not the only solution to upgrade your ESXi hosts. Hosts can also be upgraded manually by booting the host to the latest build and performing an upgrade, or by utilizing the new autodeploy features in vSphere 5. VMware Update Manager is a simple tool that can automate the installs on several hosts in sequence and is available with all editions of vSphere 5. ...

If you need to backup some of your virtual machines, maybe it’s time to consider VMware Data Recovery 2.0. This VMware appliance provides an easy way to backup some virtual machines for free, but if you’re looking for a large scale backup solution it might be necessary to use more traditional backup solutions from Symantec or Veeam. To get started, download the VMware Data Recovery iso from vmware.com. The iso includes a plugin for vCenter as well as an OVF for deploying the appliance. Once you’ve deployed the OVF template and installed the vCenter plugin, you can open the vDR from the solutions and applications section of the vCenter console. ...

Suppose you have multiple virtual machines that you would like to distribute load across that are housed inside of your virtual environment. How do we go about setting up Network Load Balancing so that it will still work with things like DRS and VMotion? Switch Refresher In most networks we have switches that listen for MAC addresses and store them in their MAC Address Table for future use. If a switch receives a request and it knows which port the destination MAC address is associated with, it will forward that request out the single port. If a switch doesn’t know which port a MAC Address is associated with, it will basically send that frame out all of it’s ports (known as flooding) so that the destination can hopefully still receive it. This is why we’ve moved away from hubs and moved towards switches. Hubs will flood everything because they don’t keep track of the MAC Addresses. You can see how this extra traffic on the network is unwanted. ...