As mentioned in my last post, Thrift is a cross-language and cross platform RPC framework. We’ve seen how a Java based Thrift server and client work there. Let’s take a look how to write a quick python script that connects to the Java Thrift server. It’s all possibe to write a Python based Thrift server, but probably not what most people want to do due to performance and scalability.
As reported in the community, there were quite excitement about the open source of the pyVmomi, the Python equivalent of vijava API. It was heatedly debated whether to open source the API even when I was working at VMware years ago. One camp of people thought it should be open sourced and even supported as Web Service SDKs; while the other group didn’t think it’s mature and would cause a lot of trouble in so doing. So it didn’t go anywhere in the past few years.
In my recent consulting projects, I used Python on various projects including the VMware pyVmomi () for managing vSphere. Because XML is ubiqutous these days, I had to use XML for configuration, passing information, etc. Parsing XML is a very basic part of using XML. The following sample code can achieve the same thing (print out may be different) as the C# sample that parses XML I wrote before.
It’s not a secret that VMware has a private Python API or so called Python binding for vSphere API. If you haven’t heard about it before, no worry. Here is a link to Hostd General Architecture. Somehow it’s not publicly released as a product for customers or partners. Over the years, I only heard a big bank uses it for internal IT automation. But it’s super easy to get it if you want – it’s part of every ESXi installation. Just check it out at /lib/python26-visor.zip if you SSH to your ESXi box. Update: in ESXi 5.5, look at the /lib/python2.6/site-packages.
As I introduced in the article on vim-cmd commands, you can use a very simple command as follows to create a new virtual machine. Alternatively, you can ignore the path after the datastore and provide only datastore name (The [ and ] are still needed).
# vim-cmd vmsvc/createdummyvm testVM “[datastore1] testVM/testVM.vmx"
Other than the name and configuration file path in data store, there is no additional information provided such as the size of the disk, memory capacity, etc. Normally, you have to go through a wizard of several pages to create a new virtual machine.
In one of my recent consulting projects, I had to use SSH from Python. After a little research, I ended up with using the paramiko package as library.
To download the paramiko package, just check out this link. What I downloaded was paramiko-1.12.0.tar.gz. After it’s uncompressed with 7-Zip to a temparary directory, just issue the following command and the needed library got installed into the site-packages directory.