How can I create a virtual machine in a vagrant with a virtual box with two cpus?

Question

On Windows 7, 64 bit is trying to start the VM (Ubuntu 32 bit). I am having trouble getting my virtual machine to show two kernels despite adding the modify vm command to my Vagrantfile. My stray version is 1.2.2.

 # -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| config.vm.box = "precise32" config.vm.box_url = "http://files.vagrantup.com/precise32.box" config.vm.provider :virtualbox do |vb| vb.customize ["modifyvm", :id, "--memory", "2048"] vb.customize ["modifyvm", :id, "--cpus", "2"] end end 

With this Vagrantfile, I vagrant up command. Then I vagrant ssh and then lscpu , which gives:

 Architecture: i686 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 1 On-line CPU(s) list: 0 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 58 Stepping: 9 CPU MHz: 2565.513 BogoMIPS: 5131.02 L1d cache: 32K L1d cache: 32K L2d cache: 6144K 

I think CPU (s) should show 2, so my virtual machine only has one processor right now. How can I get 2 processors that will be displayed when lscpu starts?

Answer 1

Add vb.customize ["modifyvm", :id, "--ioapic", "on"] to the config.vm.provider block inside your Vagrantfile.

Looking at the VirtualBox documentation, she mentions:

"Note: Enabling I / O APIC is required for working with 64-bit guest systems, especially Windows Vista; it is also necessary if you want to use more than one virtual processor in a virtual machine."

Answer 2

If you use a firewall using Oracle Virtualbox, then the most common problem is Hyper-V on Windows 7, 8, or 10. This will limit you to a 32-bit and one processor.

Start or search for “Windows Features” and select “Enable or Disable Windows Features”.

In the checkboxes, make sure that Hyper-V is turned off - you cannot enable VT-x for Virtualbox with Microsoft Hyper-V supporting it.

Then you can make your Vagrantfile download very user friendly:

  config.vm.provider "virtualbox" do |vb| vb.memory = "2404" vb.cpus = "2" end 

Assuming you want to run two cores and just over 2 GB of memory

ps - do not forget to add your port forwarding. For PHPStorm (xdebug, mysql and web) I use:

  config.vm.network "forwarded_port", guest: 80, host: 8080 config.vm.network "forwarded_port", guest: 3306, host: 3306 config.vm.network "forwarded_port", guest: 9000, host: 9000 

Answer 3

It seems you did not indicate which provider you are using. Starting with Vagrant 1.7, many VM providers (such as VirtualBox, HyperV) support the following configuration in your Vagrantfile:

 config.vm.provider "virtualbox" do |v| v.memory = 1024 v.cpus = 2 end 

Refer to the specific provider that you are using in the roaming documentation .