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KVM nested virtualization
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| L0 = bare metal machine | |
| L1 = VM on bare metal | |
| L2 = VM on VM | |
| First, ensure virtualization is enabled on L0 as described here: https://docs.fedoraproject.org/en-US/quick-docs/using-nested-virtualization-in-kvm/#proc_enabling-nested-virtualization-in-kvm | |
| Next, launch L1 with the following Vagrant config (or an equivalent directly on the hypervisor): | |
| Vagrant.configure("2") do |config| | |
| config.vm.box = "generic/ubuntu1604" | |
| config.vm.provider :libvirt do |libvirt| | |
| libvirt.cpus = 4 | |
| libvirt.memory = 16000 | |
| libvirt.nested = true | |
| libvirt.cpu_mode = "host-passthrough" | |
| libvirt.driver = "kvm" | |
| end | |
| end | |
| Finally, launch L2 from within L1 using the following Vagrant config: | |
| Vagrant.configure("2") do |config| | |
| config.vm.box = "fedora/28-cloud-base" | |
| config.vm.provider :libvirt do |libvirt| | |
| libvirt.cpus = 1 | |
| libvirt.memory = 1000 | |
| libvirt.driver = "kvm" | |
| libvirt.management_network_name = 'vagrant-libvirt-new' | |
| libvirt.management_network_address = '192.168.124.0/24' | |
| end | |
| end |
Installing vagrant and libvirt on the L1
sudo apt-get update -y
sudo apt-get install -y libvirt-bin libvirt-dev qemu-utils qemu wget
sudo /etc/init.d/libvirt-bin restart
sudo addgroup libvirtd
sudo usermod -a -G libvirtd $USER
wget https://releases.hashicorp.com/vagrant/2.2.4/vagrant_2.2.4_x86_64.deb
sudo dpkg -i vagrant_2.2.4_x86_64.deb
vagrant plugin install vagrant-libvirt
vagrant plugin install vagrant-mutate
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some other info, not sure if it is helpful: