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nova/docs/getting.started.rst

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Getting Started with Nova

GOTTA HAVE A nova.pth file added or it WONT WORK (will write setup.py file soon)

Create a file named nova.pth in your python libraries directory (usually /usr/local/lib/python2.6/dist-packages) with a single line that points to the directory where you checked out the source (that contains the nova/ directory).

DEPENDENCIES

Related servers we rely on

  • RabbitMQ: messaging queue, used for all communication between components
  • OpenLDAP: users, groups (maybe cut)
  • ReDIS: Remote Dictionary Store (for fast, shared state data)

Python libraries we don't vendor

  • M2Crypto: python library interface for openssl

Vendored python libaries (don't require any installation)

  • Tornado: scalable non blocking web server for api requests
  • Twisted: just for the twisted.internet.defer package
  • boto: python api for aws api
  • IPy: library for managing ip addresses

Recommended

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

Installation

# system libraries and tools
apt-get install -y libvirt-bin aoetools vlan
modprobe aoe

# python libraries
apt-get install -y python-libvirt python-setuptools python-dev python-pycurl python-m2crypto


# ON THE CLOUD CONTROLLER
apt-get install -y rabbitmq-server dnsmasq      
# build redis from 2.0.0-rc1 source
# setup ldap (slap.sh as root will remove ldap and reinstall it)   
auth/slap.sh     
/etc/init.d/rabbitmq-server start

# ON VOLUME NODE:
apt-get install -y vblade-persist 

# ON THE COMPUTE NODE:
apt-get install -y kpartx kvm

# optional packages
apt-get install -y euca2ools

Configuration

ON CLOUD CONTROLLER

  • Add yourself to the libvirtd group, log out, and log back in

* fix hardcoded ec2 metadata/userdata uri ($IP is the IP of the cloud), and masqurade all traffic from launched instances :

iptables -t nat -A PREROUTING -s 0.0.0.0/0 -d 169.254.169.254/32 -p tcp -m tcp --dport 80 -j DNAT --to-destination $IP:8773
iptables --table nat --append POSTROUTING --out-interface $PUBLICIFACE -j MASQUERADE

ON VOLUME NODE

  • create a filesystem (you can use an actual disk if you have one spare, default is /dev/sdb)
# 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
echo "--storage_dev=/dev/loop0" >> NOVA_PATH/bin/nova.conf

Launch servers

  • rabbitmq
  • redis
  • slapd

Launch nova components

  • api_worker
  • s3_worker
  • node_worker
  • storage_worker