RbVmomi is a Ruby interface to the vSphere API. Like the Perl and Java SDKs, you can use it to manage ESX and VirtualCenter servers. The current release supports the vSphere 5.0 API. RbVmomi specific documentation is online and is meant to be used alongside the official documentation.


gem install rbvmomi


A simple example of turning on a VM:

require 'rbvmomi'
vim = RbVmomi::VIM.connect host: 'foo', user: 'bar', password: 'baz'
dc = vim.serviceInstance.find_datacenter("mydatacenter") or fail "datacenter not found"
vm = dc.find_vm("myvm") or fail "VM not found"

This code uses several RbVmomi extensions to the vSphere API for concision. The expanded snippet below uses only standard API calls and should be familiar to users of the Java SDK:

require 'rbvmomi'
vim = RbVmomi::VIM.connect host: 'foo', user: 'bar', password: 'baz'
rootFolder = vim.serviceInstance.content.rootFolder
dc = rootFolder.childEntity.grep(RbVmomi::VIM::Datacenter).find { |x| x.name == "mydatacenter" } or fail "datacenter not found"
vm = dc.vmFolder.childEntity.grep(RbVmomi::VIM::VirtualMachine).find { |x| x.name == "myvm" } or fail "VM not found"
task = vm.PowerOnVM_Task
filter = vim.propertyCollector.CreateFilter(
  spec: {
    propSet: [{ type: 'Task', all: false, pathSet: ['info.state']}],
    objectSet: [{ obj: task }]
  partialUpdates: false
ver = ''
while true
  result = vim.propertyCollector.WaitForUpdates(version: ver)
  ver = result.version
  break if ['success', 'error'].member? task.info.state
raise task.info.error if task.info.state == 'error'

As you can see, the extensions RbVmomi adds can dramatically decrease the code needed to perform simple tasks while still letting you use the full power of the API when necessary. RbVmomi extensions are often more efficient than a naive implementation; for example, the find_vm method on VIM::Datacenter used in the first example uses the SearchIndex for fast lookups.

A few important points:

Built-in extensions are under lib/rbvmomi/vim/. You are encouraged to reopen VIM classes in your applications and add extensions of your own. If you write something generally useful please send it to me and I'll add it in.


Fork the project on Github and send me a merge request, or send a patch to rlane@vmware.com. RbVmomi developers hang out in #rbvmomi on Freenode.