createvm

As a child of the 80's, I still remember waking up super early on a Saturday morning to watch some of my favorite cartoons including Transformers, GI Joe, Ninja Turtles and many of the Marvel cartoon series. Last week I saw an interesting tweet from our former VMware CTO, Steve Herrod:

It looks like Marvel has just released a Marvel Comics REST API which allows developers to access the entire Marvel Comics Universe and build custom applications and websites with that data. So, you might be wondering what does this have to do with VMware and virtualization? Well, when I heard about this API, I knew I had to find a way to incorporate this into a cool VMware project.

I decided to create a sample vSphere SDK for Python (also known as pyvmomi) script that would allow a user to specify a number of random Marvel Characters to select from the Marvel database and then automatically create dummy VMs based on those names which could be used for testing. There were a variety of VMware SDK's (Perl, Ruby, PowerCLI, Java, etc) that I could have used, but I opted for the vSphere SDK for Python given my Python skills were not very strong. This also gave me a good reason to play around with our Python SDK.

There are a couple of things you will need to setup before you can use the sample script:

Setup a Marvel API key
Install vSphere SDK for Python, you can take a look here.
Download the create_random_marvel_vms.py

Disclaimer: There is not much error handling built into the sample script, please use at your own risk.

You will need to edit the script and replace the following two variables: marvel_public_key & marvel_private_key with the API key after creating an account on Marvel's website. One thing I really like about the Marvel API and I know many other vendors also provide this which is an interactive API tester. This allows a user to explore and execute a particular API requests without writing a single line of code to get a better understanding of the results before one starts to develop their application.

To run the script, you will need to pass in the following parameters:

--host : Name of your vCenter Server (only tested with vCenter)
--user : User to login with
--password : Password for the user
--datastore : Name of the datastore in which VMs will be created in
--count : The number of Dummy VMs to create

Here is an example of running the script:

./create_random_marvel_vms.py --host vcenter --user root --password vmware --datastore mini-local-datastore-1 --count 10

As you can see from the screenshot above I have just created 10 random VMs where each name is a random Marvel character extracted using a GET request on /v1/public/characters. If we head over to our vSphere Web Client, we should now see our 10 newly created VMs which contain 1vCPU and 128MB of memory. To keep things simple, I did not add a vDisk but you can easily tweak the dummy VM configuration based on your requirements.