Libvirt and bhyve

Craig Rodrigues
rodrigc@FreeBSD.org

Bay Area FreeBSD Users GroupJuly 10, 2014

libvirt

What is libvirt?

Open source project: http://libvirt.org

Toolkit to interact with hypervisors: KVM, Xen, LXC, OpenVZ, Usermode Linux, VirtualBox, VMWare ESX, Hyper-V, Parallels, Bhyve

C library, with bindings for other languages: Python, Ruby, Java, C#, Ocaml, Perl, PHP

Used by many 3rd party applications

Libvirt architecture

Source: http://www.tuxradar.com/content/howto-linux-and-windows-virtualization-kvm-and-qemu

libvirt and bhyve

Libvirt and bhyve:
Thanks to Roman

Roman Bogorodskiy has added bhyve support to libvirt

Roman has pushed the code upstream to libvirt.org

Installing the code

Need to build from ports, patches committed on July 9, 2014

Update ports tree:
portsnap fetch; portsnap update

Make sure you have libvirt 1.2.6 or higher

Build it:

cd /usr/ports/devel/libvirt; make; make install

In future, pkg install devel/libvirt

Running the code

Customize /usr/local/etc/libvirtd.conf

Start the demon: libvirtd

Edit a config file in XML format with the bhyve VM info

Run commands via virsh to start the VM

See step-by-step instructions: http://people.freebsd.org/~rodrigc/libvirt/libvirt-bhyve.html

py-libvirt

py-libvirt

Python bindings for libvirt

Available in ports: /usr/ports/devel/py-libvirt

py-libvirt sample code

import libvirtimport sys

# Note we need to specify the URL hereconn = libvirt.openReadOnly("bhyve:///system")

if conn == None: print 'Failed to open connection to the hypervisor' sys.exit(1)

try: print("All domains: ",conn.listAllDomains()) print("Defined domains: ", conn.listDefinedDomains())

dom0 = conn.lookupByName("bhyve")except: print 'Failed to find the main domain' sys.exit(1)

print("Domain 0: id %d running" % (dom0.ID()))print(dom0.info())

virt-manager

What is virt-manager?

GUI application for interacting with libvirt

Written in Python, with GTK bindings for GUI

Available in ports:
/usr/ports/deskutils/virt-manager

Patch to port for bhyve required:
http://people.freebsd.org/~rodrigc/libvirt/virt-manager.html

virt-manager screenshot

Jenkins and libvirt

Jenkins libvirt plugin

Libvirt slaves plugin:
https://wiki.jenkins-ci.org/display/JENKINS/Libvirt+Slaves+Plugin

Allows VM's to be created on demand in response to build jobs, and shut down after job is complete

See step-by-step instructions: http://people.freebsd.org/~rodrigc/libvirt/libvirt-bhyve-jenkins.html

Thanks!

Roman Bogorodskiy , wrote the code, pushed it upstream

Jason Helfman , maintains the libvirt port

I need help

Need more people to try this stuff out

Report bugs to freebsd-virtualization@freebsd.org
(see http://lists.freebsd.org )

Supply code, patches, and documentation

Implement more of the libvirt API for bhyve, and send patches to Roman