Tf-devstack on Ubuntu 16.04 with KVM and linuxbridge

Tf-devstack on Ubuntu 16.04 with KVM and linuxbridge.txt

This will walk you through setting up KVM and a bridged network connection on an Ubuntu 16.04 host and installing a Tf-devstack guest VM.
This example uses the 192.168.1.0/24 subnet with 192.168.1.20 for the Ubuntu host and 192.168.1.21 for the Centos guest.

1) Install needed virtualization and network bridge packages with 
	sudo apt-get install qemu-kvm libvirt-bin virtinst bridge-utils virt-viewer
 
2) Next we need to make sure the CPU/MOBO has the virtuilizion extensions enabled with
	sudo kvm-ok

3) Now we must setup a network bridge for our KVM guest. First backup the current network config with
	sudo cp /etc/network/interfaces /etc/network/interfaces.backup_before_bridge

4) Edit the interfaces file and add in the bridge config like this example
	OLD INTERFACES FILE EXAMPLE
	auto eth0
	iface eth0 inet static
		address 192.168.1.20
		netmask 255.255.255.0
		gateway 192.168.1.1
		dns-nameservers 8.8.8.8

	NEW INTERFACES FILE EXAMPLE
	auto br0
	iface br0 inet static
		address 192.168.1.20
		netmask 255.255.255.0
		gateway 192.168.1.1
		dns-nameservers 8.8.8.8
         	bridge_ports eth0
         	bridge_stp off
         	bridge_fd 0
         	bridge_maxwait 0
	
5) Restart networking and verify bridge setup with
	sudo ifdown -a && sudo ifup -a && sudo brctl show

6) Download Centos 7 ISO with
	sudo wget https://mirrors.kernel.org/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1908.iso -O /var/lib/libvirt/boot/centos-7-1908.iso

7) Create Tf-devstack guest with
	sudo virt-install \
		--virt-type=kvm \
		--name centos7_tf-devstack \
		--ram 8192 \
		--vcpus=2 \
		--os-variant=centos7.0 \
		--virt-type=kvm \
		--hvm \
		--cdrom=/var/lib/libvirt/boot/centos-7-1908.iso \
		--network=bridge=br0,model=virtio \
		--graphics vnc \
		--disk path=/var/lib/libvirt/images/centos7_tf-devstack.qcow2,size=30,bus=virtio,format=qcow2

8) Connect to the guest VM and complete the Centos installer. Set the Centos guest VM IP address to 192.168.1.21 
	sudo virsh --connect qemu:///system centos_tf-devstack

9) Ssh to the guest VM with
	ssh centos@192.168.1.21

10) Install Tf-devstack with the following commands
	sudo su -
	yum install -y git
	git clone http://github.com/tungstenfabric/tf-devstack
	cd tf-devstack
	./startup.sh

11) Wait for the script to complete and then access the WebUI with	
	https://192.168.1.21:8143
	U: admin P: contrail123