Category Archive: Yellow-Bricks

Jun 12

Creating a nested lab

I was just building a nested lab to record some demo videos. I find myself googling for this every single time so I figured I would write about it so I can easily get it of my own website. Many have written about this before and all credits go to William Lam and Eric Gray, which are the two  main blogs I have used in the past to get this working.

After installing ESXi on my physical box I “ssh” in to it. In order to allow “nested ESXi” to boot a 64bit OS you will need to run the following:

echo 'vhv.allow = "TRUE"' >> /etc/vmware/config

After you have done that you will want to make sure you will get network connection. Go to your “VM Network” portgroup, or if you named it differently the portgroup that is used to connect the virtual ESXi hosts to. For each of the hosts do the following:

  1. Click on the host
  2. Go to “Configuration”
  3. Click on “Networking”
  4. Click “Properties” on the vSwitch
  5. Select the correct portgroup
  6. Click “Edit”
  7. Click “Security”
  8. Set “Promiscuous Mode” to “Accept”
  9. Click “Ok”
  10. Click “Close”

Now for each virtual ESXi host (note there is a “guest os” called ESXi 5 in there, use it!) that you have created do the following:

  1. Right click on the VM
  2. Click “Edit settings”
  3. Click the “Options” tab
  4. Click on “CPU/MMU virtualization”
  5. Select the 4th option “Use Intel VT-x / AMD-v…”

I am building this out to record a new of “DR of the Cloud”. In other words, 3 virtual clusters + vCloud Director + SRM + vSphere Replication + Virtual Storage Appliances… Cool stuff right.

Creating a nested lab” originally appeared on Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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May 31

Which isolation response should I use?

I wrote this article about split brain scenarios for the vSphere Blog. Based on this article I received some questions around which “isolation response” to use. This is not something that can be answered by a simple “recommended practice” and applied to all scenarios out there. Note that below has got everything to do with your infrastructure. Are you using IP-Based storage? Do you have a converged network? All of these impact the decision around the isolation response.

The following table however could be used to make a decision:

Likelihood that host will retain access to VM datastores Likelihood that host will retain access to VM network Recommended Isolation policy Explanation
Likely Likely Leave Powered On VM is running fine so why power it off?
Likely Unlikely Either Leave Powered On or Shutdown Choose shutdown to allow HA to restart VMs on hosts that are not isolated and hence are likely to have access to storage
Unlikely Likely Power Off Use Power Off to avoid having two instances of the same VM on the VM network
Unlikely Unlikely Leave Powered On or Power Off Leave Powered on if the VM can recover from the network/datastore outage if it is not restarted because of the isolation, and Power Off if it likely can’t.

Which isolation response should I use?” originally appeared on Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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May 29

VMworld session voting

I submitted several sessions. Of course, just like everyone else, I could use your help when it comes to voting. These are the ones I submitted (or are part of):

  • 1154 – vCloud Director Infrastructure Resiliency – DR of the Cloud – Chris Colotti and Duncan Epping
    In this session Chris and I will focus on vCloud Director infrastructure resilience. Although there is no direct vCloud Director and Site Recovery manager integration, we will look at how to replicate the data, what applications are primary targets, how to size environments, how to maintain multi-tenancy, and what to avoid when architecting these solutions.
  • 1159 – Architecting and Operating a vSphere Metro Storage Cluster – Lee Dilworth and Duncan Epping
    In this session Lee Dilworth and I will discuss the design and operational considerations for vSphere Metro Storage Clusters environments, also commonly referred to as stretched cluster environments. Best practices around implementation and design will be shared. Various failure scenarios which can occur in a stretched storage environment are discussed in-depth including how vSphere 5 responds to these failures.
  • 1202 – Cloud Infrastructure Architecture and Operations Q&A – Chris Colotti, Kamau Wanguhu, Aidan Dalgleish and Duncan Epping
    This is the only session at VMworld which will allow you to freely ask four VMware Certified Design Experts (VCDX) questions around how to architect and operate your cloud infrastructure. Our panel holds expertise on Networking, Storage, vCloud Director and vSphere and consists of Chris Colotti (VCDX037), Kamau Wanguhu (VCDX003), Aidan Dalgleish (VCDX010) and Duncan Epping (VCDX007). We will help you make the right decisions while explaining some of the underlying fundamental concepts of the Cloud Infrastructure Suite allowing you to optimize your operations and architecture. This is one of those sessions that you cannot afford to miss out on!
  • 1504 – Ask the Expert vBloggers – Scott Lowe, Duncan Epping, Rick Scherer, Frank Denneman, Chad Sakac
    One of the highest rated sessions at VMworld is back for it’s fifth year! Come meet four VMware Certified Design Experts (VCDX) on stage answering your questions. We get the top Virtualization Bloggers in the industry and get them on stage answering your questions in a wide array of topics.

Of course there are a million other great sessions you should be voting for… Chris Colotti, David Hill, Frank Denneman, Cormac Hogan, Tom Stephens and many others submitted excellent sessions, don’t forget to vote for them as well. Thanks for taking the time!

VMworld session voting” originally appeared on Follow us on Twitter and Facebook.
Available now: vSphere 5 Clustering Deepdive. (paper | e-book)

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