The Linux Guest agent has not changed much since 5.1. You will notice most everything except the agent version remains basically the same as my article on executing scripts with the 5.1 Linux Guest agent.
Linux Guest Agent
The Linux guest agent has a number of feature benefits that you receive if you utilize it. The Linux guest agent is a small agent that acts very similarly to the vCAC proxy agents. When it is installed you give it the name or IP address of the vCAC server. This allows it to check in with the server when it loads on a newly provisioned machine and determine if there is anything it needs to do. If the vCAC server has work for it to do it send the instructions and the agent executes the instructions on the local guest operating system. The guest agent comes with a number of pre-built scripts and functions, but also allows you to execute your own scripts. Some of the features available with the Linux Guest Agent are:
- Disk Operations – Partition, Format, and mount disk that is added to the machine.
- Execute Scripts – Execute scripts after the machine is provisioned.
- Network Operations – Configure setting for additional network interfaces added to the machine.
Continue reading “vCloud Automation Center – vCAC 5.2 – Installing the 5.2 Guest Agent on Linux”
So I have been getting a lot of questions regarding the vCAC 5.2 Guest Agents. In vCAC 5.2 the guest agents have changed and there are a few bugs in the Windows Installation. Good new for those of you who had upgraded from vCAC 5.1, you don’t need to scramble to move form the 5.1 guest agent, to the vCAC 5.2 guest agent. The vCAC 5.1 guest agent will still work as usual as long as you had it configured for SSL. The big driver for the change to the Windows agent is Windows Server 2012. The previous vCAC 5.1 agent will not work with Windows Server 2012 so if you are planning on using 2012, you will need to use the 5.2 guest agent.
Installing the vCAC 5.2 Windows Agent
You have two options for using the vCAC guest agent. You can pre-install the agent in your templates, or if you want to keep your templates clean you can install the agent as part of the Sysprep customization by using customization specifications. For information on auto deploying the guest agent see the following post:
Continue reading “vCloud Automation Center – vCAC 5.2 – Installing the 5.2 Guest Agent on Windows”
During a POC something was brought to my attention that I haven’t heard anyone ask for before, but it seems like a very useful and valid need. The ask was to be able to set CPU Cores during provisioning rather than CPU’s. Operating Systems and other apps license by sockets, not cores so instead of having 8 CPU Sockets with 1 core, why not have 1 CPU Socket with 8 Cores. So I decided to build a solution that would solve this and change the CPU Sockets to Cores.
Now I prefer to do as much as I can in the design center and with the WorkFlow stubs because then they will work for everyone without the need for the CDK so taking that into consideration here is what I have built.
I am executing my script at the MachineProvisioned state of the virtual machines lifecycle. This can mean different things based on the provisioning type that is selected. If we are talking about cloning then it means that the clone has finished, vCAC hardware customization has taken place, Customization Specification has executed, any operation performed by the guest agent are complete and the VM for all intents is complete.Using the WFStubMachineProvisioned workflow however I can perform additional operations before the machine is handed off to the owner. In this case I’m using the workflow stub to execute a powershell script named SocketsToCores.
Continue reading “vCloud Automation Center – vCAC – Workflow and Script to Change CPU’s to Cores”
Wow this one is currently a really hot topic. I must have been asked how to automate the installation of vCAC 50 or more times in the last week and I can’t even count over the last month, so here it is. As I’m sure everyone has learned there area a number of components to vCAC. When installing from the command line you will need to install each of them independently. What you will see in this post may be a bit confusing and it’s understandable as I’m merely sharing the commands without much explanation. I plan to go through my step by step tutorials and inject the options to the relevant steps in them. Hopefully I will find time to round back to this article and put much more time into explaining each option. For now I hope this helps anyone trying to do an automated installation.
Each of the examples is for performing an https install, however can change from https to http if you like. I should also point out in the vCAC 5.2 release this is much more simplified and much less complex. Please post any questions you have regarding this topic in the forum under the thread “vCAC Automated Installation Questions“.
Continue reading “vCloud Automation Center – vCAC 5.1 – Automating the vCAC installation”
We have just launched our DailyHypervisor Forum located at http://www.dailyhypervisor.com/forum. Stop by, contribute and be a part of our community. The DH Forum is intended to be for all things cloud. Currently we have forums created for vCAC, vCD, vCO, Cloud General, and Openstack. More forum categories will be coming based on demand. If you have a category you would like to see shoot us a note and let us know.
Our goal is to create a common place where anyone can come to learn, get help, share ideas, or just about anything that will help foster knowledge regarding cloud computing. Considering this very blog is the announcement of our forum you could image there isn’t a whole lot happening yet so what are you waiting for, be the first. Go ask a question, post an issue, share a thought and let’s get things rolling.
In my article Custom Properties Demystified I reference a chart I put together that defines the override order of custom properties based on where they are defined. The document is available in the downloads section. This document is a list of my findings based on testing I performed.
While delivering a vCAC 5.1 training class today I shared the document with my class and one of the attendees was kind enough to look over the chart and determine a definitive override order based on the data. This is great as I never took the time to review the data to determine a definitive override order. So here you go.
Continue reading “vCloud Automation Center – vCAC 5.1 – Custom Property Overrides”