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Getting Started with Nova

This code base is continually changing so dependencies also change.

Dependencies

Related servers we rely on

  • RabbitMQ: messaging queue, used for all communication between components

Optional servers

  • OpenLDAP: By default, the auth server uses the RDBMS-backed datastore by setting FLAGS.auth_driver to 'nova.auth.dbdriver.DbDriver'. But OpenLDAP (or LDAP) could be configured by specifying 'nova.auth.ldapdriver.LdapDriver'. There is a script in the sources(nova/auth/slap.sh) to install a very basic openldap server on ubuntu.
  • ReDIS: There is a fake ldap driver that backends to redis. This was created for testing ldap implementation on systems that don't have an easy means to install ldap.

Python libraries that we use (from pip-requires):

../../tools/pip-requires

Other libraries:

External unix tools that are required:

  • iptables
  • ebtables
  • gawk
  • curl
  • kvm
  • libvirt
  • dnsmasq
  • vlan
  • open-iscsi and iscsitarget (if you use iscsi volumes)
  • aoetools and vblade-persist (if you use aoe-volumes)

Nova uses cutting-edge versions of many packages. There are ubuntu packages in the nova-core ppa. You can use add this ppa to your sources list on an ubuntu machine with the following commands:

sudo apt-get install -y python-software-properties
sudo add-apt-repository ppa:nova-core/ppa

Recommended

  • euca2ools: python implementation of aws ec2-tools and ami tools
  • build tornado to use C module for evented section

Installation

Due to many changes it's best to rely on the OpenStack wiki for installation instructions.

Configuration

These instructions are incomplete, but we are actively updating the OpenStack wiki with more configuration information.

On the volume node

  • Create a volume group (you can use an actual disk for the volume group as well)
# This creates a 1GB file to create volumes out of
dd if=/dev/zero of=MY_FILE_PATH bs=100M count=10
losetup --show -f MY_FILE_PATH
# replace /dev/loop0 below with whatever losetup returns
vgcreate nova-volumes /dev/loop0

Running

Launch servers

  • rabbitmq
  • redis (optional)

Launch nova components

  • nova-api
  • nova-compute
  • nova-objectstore
  • nova-volume
  • nova-scheduler