1.
Libvirt and bhyve
Craig Rodrigues
rodrigc@FreeBSD.org
Bay Area FreeBSD Users Group
July 10, 2014

2.
libvirt

3.
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

4.
Libvirt architecture
Source:
http://www.tuxradar.com/content/howto-linux-and-wind

5.
libvirt and bhyve

6.
Libvirt and bhyve:
Thanks to Roman
● Roman Bogorodskiy <novel@freebsd.org> has
added bhyve support to libvirt
● Roman has pushed the code upstream to
libvirt.org

7.
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

8.
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

9.
py-libvirt

10.
py-libvirt
● Python bindings for libvirt
● Available in ports: /usr/ports/devel/py-libvirt

11.
py-libvirt sample code
import libvirt
import sys
# Note we need to specify the URL here
conn = 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())

12.
virt-manager

13.
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-manage

14.
virt-manager screenshot

15.
Jenkins and libvirt

16.
Jenkins libvirt plugin
● Libvirt slaves plugin:
https://wiki.jenkins-ci.org/display/JENKINS/Libvirt+S
● 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

17.
Thanks!
● Roman Bogorodskiy <novel@freebsd.org>,
wrote the code, pushed it upstream
● Jason Helfman <jgh@freebsd.org>, maintains
the libvirt port

18.
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