Introduction
Now that everything needed for minimega to run is installed. If you are going running minimega inside a virtual machine we can do some pre flight checks.
If you are using Bare Metal you can skip this module.
Prechecks
KVM by default enables nested virtualization if the host operating system and hardware support it.
Ubuntu 16.04 LTS has the kernel module enabled by default and won’t require additional configuration.
There are some things we can check for to make sure this is the case.
Kernel Module
On a virtual machine with an Intel Processor run:
# cat /sys/module/kvm_intel/parameters/nested
On a virtual machine with an AMD Processor run:
# cat /sys/module/kvm_amd/parameters/nested
If the command returns the letter "Y" the module is loaded. If it returns the letter "N" the module is not loaded.
Debugging
If you got a letter "N" on VMWare make sure you checked the box to "Virtualize Intel VT-x/EPT or AMD-V/RVI"
If you got a letter "N" ensure your OS has the nested virtualization kernel module enabled.
If you still get the letter "N" your hardware does not support nested virtualization and you will need to use bare metal or a different machine.
virt-host-validate
The program virt-host-validate can be used to verify nested virtualization support. On Ubuntu this program is included in libvirt-bin.
apt-get install libvirt-bin
When you run virt-host-validate all checks should "PASS". Depending on your hardware you may get a "WARN".
# virt-host-validate QEMU: Checking for hardware virtualization : PASS QEMU: Checking for device /dev/kvm : PASS QEMU: Checking for device /dev/vhost-net : PASS QEMU: Checking for device /dev/net/tun : PASS
Authors
The minimega authors
30 May 2017