Installing Openstack with Neutron networking using Devstack on Ubuntu 14.04

Devstack [1] is package with a set of scripts to easily install Openstack on Ubuntu environment without worrying about painful configurations while installing Openstack from scratch. In this post I'm describing how to install Openstack in a single machine with networking (neutron) facility using Devstack. This set up consists of installation guide for Openstack's main servers (nova, keystone, cinder, glance and horizon) and additional networking server (neutron).

Prerequisites

Before continuing with installation verify whether following requirements are met in your machine

1. At least 4 threads in your processor

2. 4 GB physical memory

3. Physical network interface with connected to a router and available IPs in that subnet to allocate to VMs. In my case it is 192.168.1.200 in the network 192.168.1.0/24

4. An internet connection. Devstack may need to download required libraries from internet while installation

5. 100 GB free space in the partition (If you need not to create larger vloumes, you can proceed with the installation without that much of space)

Installation steps

1. Clone Devstack from following URL
git clone https://git.openstack.org/openstack-dev/devstack

2. Go to Devstack directory and create a file named local.conf and add following configuration details.

[[local|localrc]]
MULTI_HOST=1
LOGFILE=/opt/stack/logs/stack.sh.log
ADMIN_PASSWORD=123456
DATABASE_PASSWORD=123456
RABBIT_PASSWORD=123456
SERVICE_PASSWORD=123456
SERVICE_TOKEN=xyzpdqlazydog
API_RATE_LIMIT=False

# neutron (networking) configuration
HOST_IP=192.168.1.200 # IP of your Ethernet interface
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service q-metering
Q_USE_SECGROUP=True

FLOATING_RANGE="192.168.1.0/24" # floating (public) IP range of external interface that can be 
                                # used to access VMs from outside
FIXED_RANGE="10.0.0.0/24"       # Fixed IP range that is assigned to VMs for housekeeping 
                                #tasks of Openstack
Q_FLOATING_ALLOCATION_POOL=start=192.168.1.226,end=192.168.1.254

PUBLIC_NETWORK_GATEWAY="192.168.1.1"
Q_L3_ENABLED=True
PUBLIC_INTERFACE=eth0           # Ethernet interface name
Q_USE_PROVIDERNET_FOR_PUBLIC=True
OVS_PHYSICAL_BRIDGE=br-ex
PUBLIC_BRIDGE=br-ex
OVS_BRIDGE_MAPPINGS=public:br-ex

# Optional, to enable tempest configuration as part of DevStack
# enable_service tempest

# cinder volume configuration
# By default cinder creates a LVM partition with a size of 10 GB which limits you to 
# create volumes size of less than 10 GB, If you want to increase this default value, uncomment
# following lines
# VOLUME_GROUP="stack-volumes"
# VOLUME_NAME_PREFIX="volume-"
# VOLUME_BACKING_FILE_SIZE=60250M
  

3. Run stack.sh to install Openstack using Devstack scripts.


[1] http://docs.openstack.org/developer/devstack/