You can create a virtual machine directly from the Templates tab, as well as from the Virtual Machines tab. In the Templates tab, right-click the required template and select New VM. For more information on selecting the settings and controls for the new virtual machine see Section A. This section describes procedures for sealing Linux virtual machines and Windows virtual machines. Sealing is the process of removing all system-specific details from a virtual machine before creating a template based on that virtual machine.
Sealing is necessary to prevent the same details from appearing on multiple virtual machines created based on the same template. It is also necessary to ensure the functionality of other features, such as predictable vNIC order. There are two main methods for sealing a Linux virtual machine in preparation for using that virtual machine to create a template: manually, or using the sys-unconfig command.
Sealing a Linux virtual machine manually requires you to create a file on the virtual machine that acts as a flag for initiating various configuration tasks the next time you start that virtual machine.
The sys-unconfig command allows you to automate this process. However, both of these methods also require you to manually delete files on the virtual machine that are specific to that virtual machine or might cause conflicts amongst virtual machines created based on the template you will create based on that virtual machine.
As such, both are valid methods for sealing a Linux virtual machine and will achieve the same result. You must generalize seal a Linux virtual machine before creating a template based on that virtual machine.
You can find a really good long list of tweaks in this article. You can find a good short list of tweaks in this article. At this time I am not using any of these tweaks but when I do I will update this section of the article. If your deploy from template is not successful, like mine was, meaning that the template name remained and the VM name was not taken by the VM, you should check the following folder and file for clues. If you try and install the deploypkg and get an error like below you are missing the VMware certs.
I had problems with this, so I used wget. Which is why I added it to the list above! And that worked great. See below for an example. With this info you should be successful in building out a Centos template for use in your VMware environment and without all the issues that I had. I am not a Linux guy so I might have more info here in this article then necessary but I can tell you it works!
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Notify me of new posts via email. This site uses Akismet to reduce spam. In the interest of keeping my template as small as possible I wipe this. Starting fresh with the logs is nice. It also means that your template image is smaller. Lots of leaked information there ;. Yep, well that's the udev persistent network interface rules coming back to haunt you. This is how I've decided to deal with the problem.
This is a corollary to step 5, just removing unique identifiers from the template so the cloned VM gets its own. Not that I would know anything about that.
Time to clear the history of everything you've just done and shutdown the server in a clean state for converting to a VM:. Once the server shuts down as a result of the sys-unconfig command you can convert to a sanitized template in vSphere and add any customization specs required to the Linux deployments.
Hey Liam, Awesome How To article! Install the operating system on the VM. Then install all the necessary updates, security patches, antivirus protection, and specific software needed for your purposes. Configure your OS settings, such as environment variables, remote access, etc. Set passwords for users and the administrator s. Passwords should never expire; this way, you can prevent accounts from getting locked.
You can also configure a default user profile. Installing VMware Tools. This is an important requirement for using VM templates because VMware Tools are used when customization specifications are applied for changing IP configuration, host name, time zone, or other guest OS settings when VMs are deployed from a template.
Removing unwanted software components from a VM. You can make your VM template more lightweight by optimizing the guest OS. The following are some general recommendations for Windows systems that may be useful for configuring your VMs:. You can carry out a deeper cleanup of your guest OS to optimize VM performance depending on your demands. In the following sections, you can learn about configuring a Linux virtual machine for the purposes of making a VM template with which you could use guest OS customization specification.
This walkthrough uses the example of Xubuntu 16 x It also discusses how to create a customization specification for further cloning of VMs from your template. In order to prepare Xubuntu Linux for guest OS specification customization, enter the Linux console Terminal and run the following commands as a user with root privileges:. Type ifconfig to view the IP configuration of network interfaces. In this example, the virtual network interface used by the source VM has an IP address of Once your VM has been prepared, you can create a VM template.
You must have access to vCenter Server for managing your ESXi hosts, virtual machines, storage, networks and other vSphere components.
As mentioned above, in the configuration examples considered in this blog post, a VM running Xubuntu Linux is used. Two methods can be used for VM template creation — converting to a template and cloning to a template. Converting to a template. When you convert a VM to a template, your source VM gets replaced by the resulting template, and as a result, your source VM would be unavailable. In order to convert a VM to a template, take the following steps:.
Cloning to a template.
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