Search Results for: kickstart

How to prompt for user input during an interactive or scripted install of ESXi?

10.28.2015 by William Lam // 24 Comments

A question that continues to pop up from time to time is whether it is possible to prompt for user input during an interactive or scripted installation of ESXi? This is actually something I have written about before using PXE boot options as a workaround to provide for a semi-interactive automated installation of ESXi. The most recent request for this was not actually from a customer but rather someone internally working at VMware. The individual noted that he had already read my blog and a few other references but was still hopeful for a solution. I remember when I had looked into this problem several years back, I was not able to find anything and the inquiries to VMware (which I was still a customer at the time) came up empty.

UPDATE (01/10/19) - For ESXi 6.5 or greater, please take a look at this blog post for an updated solution

After replying back to the individual with the information that I had, it actually got me thinking which is usually not good 😉 Having just recently finished building a new Kickstart environment to test UEFI PXE boot for ESXi 6.0, I figure I might as well take another look at this topic again. I wanted to see if there was something that could be done with one of the /dev/ttyl (teletype) interfaces while the ESXi Installation was running. I did a couple of Google searches and to my surprise, there was someone on the VMTN Community forum who had already solved this problem and posted a solution almost 1 year before my article, not sure how I could have missed that?!

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UEFI PXE boot is possible in ESXi 6.0

10.09.2015 by William Lam // 21 Comments

A couple of days ago I received an interesting question from fellow colleague Paudie O'Riordan, who works over in our Storage and Availability Business Unit at VMware. He was helping a customer who was interested in PXE booting/installing ESXi using UEFI which is short for Unified Extensible Firmware Interface. Historically, we only had support for PXE booting/installing ESXi using the BIOS firmware. You also could boot an ESXi ISO using UEFI, but we did not have support for UEFI when it came to booting/installing ESXi over the network using PXE and other variants such as iPXE/gPXE.

For those of you who may not know, UEFI is meant to eventually replace the legacy BIOS firmware. There are many benefits with using UEFI over BIOS, a recent article that does a good job of explaining the differences can be found here. In doing some research and pinging a few of our ESXi experts internally, I found that UEFI PXE boot support is actually possible with ESXi 6.0. Not only is it possible to PXE boot/install ESXi 6.x using UEFI, but the changes in the EFI boot image are also backwards compatible, which means you could potentially PXE boot/install an older release of ESXi.

Note: Auto Deploy still requires legacy BIOS firmware, UEFI is not currently supported today. This is something we will be addressing in the future, so stay tuned.

Not having worked with ESXi and UEFI before, I thought this would be a great opportunity for me to give this a try in my homelab which would also allow me to document the process in case others were interested. For my PXE server, I am using CentOS 6.7 Minimal (64-Bit) which runs both the DHCP and TFTP services but you can use any distro that you are comfortable with.

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Easily automate ESXi 6.0 Active Directory join using domainjoin-cli

04.06.2015 by William Lam // 9 Comments

A nice little enhancement that I recently came across in ESXi 6.0 is the inclusion of the Likewise utility called domainjoin-cli which allows you to join a system to an Active Directory Domain. Previously, if you wanted to automate the process of joining an ESXi host to an Active Directory Domain, you had to either manually configure it using the vSphere Web/Client, using Host Profiles or creating an external script using the vSphere APIs.

All of these options were mostly executed during the post-provisioning process and if you wanted to include Active Directory configuration as part of the provisioning process, you may have had to resort to something like calling into the vSphere MOB within a Kickstart script as I had shown back in 2011 in this article here. The solution I came up with was not ideal but it worked for those that did not want to have additional steps after initial provisioning.

With the domainjoin-cli utility now included in the ESXi Shell of ESXi 6.0, you easily automate the joining an Active Directory Domain with just a couple of lines added to your Kickstart or provisioning scripts. Before you can use the command-line utility, you will need to ensure the Likewise Service Manager Daemon is running by running the following two commands which will start the service and also ensure the service automatically starts up:

/etc/init.d/lwsmd start
chkconfig lwsmd on

Next, to join to your Active Directory Domain, you will need to specify the following 3 parameters:

join - Specifying the operation is a join versus a leave
AD Domain Name - Active Directory Domain to join
AD Username - Active Directory username to join to the domain
AD Password - Active Directory password to join to the domain (optional as you will be prompted if it is not specified)

Here is an example of what the command looks like joining my Active Directory Domain in my lab:

/usr/lib/vmware/likewise/bin/domainjoin-cli join primp-industries.com administrator [PASSWORD]

You should see a success message if the ESXi host was successfully joined to the Active Directory Domain and you will want to reboot your ESXi host for the changes to take full effect. This is definitely a simpler method to include into an ESXi Kickstart script to automate the joining of an Active Directory Domain and hopefully you will find this handy when using ESXi 6.0.