OpenStack Icehouse : Add Compute Nodes2014/05/13

	Add Compute Nodes to run more instances.
[1]	Install KVM Hypervisor first which needs on Compute Node. It's unnecessarry to set Bridge networking on the section [2] of the link.
[2]	Install Nova-Compute, Nova-Network

root@node01:~#

apt-get -y install nova-compute-kvm nova-api-metadata python-novaclient

[3]	Configure Nova

root@node01:~#

vi /etc/nova/nova.conf

# add at the last line

# add if it's not need IPv6

use_ipv6=false
auth_strategy=keystone
rootwrap_config=/etc/nova/rootwrap.conf

# the one added in MySQL

connection=mysql://nova:password@10.0.0.30/nova
osapi_compute_listen="0.0.0.0"
osapi_compute_listen_port=8774
scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler

# Glance server's hostname or IP

glance_host=10.0.0.30
glance_port=9292
glance_protocol=http
rpc_backend=nova.openstack.common.rpc.impl_kombu
notification_driver=nova.openstack.common.notifier.rpc_notifier

# Memcached server's hostname or IP

memcached_servers=10.0.0.30:11211

# RabbitMQ server's hostname or IP

rabbit_host=10.0.0.30

# RabbitMQ server's user for auth

rabbit_userid=guest

# RabbitMQ server's password of above user for auth

rabbit_password=password

[keystone_authtoken]

# Keystone server's hostname or IP

auth_host=10.0.0.30
auth_port=35357
auth_protocol=http
admin_tenant_name=service
admin_user=nova

# Nova user's password added in Keystone

admin_password=servicepassword

[4]	Configure Networking. The follows is for the case you use legacy nova-network function. But if you use Neutron Networking function, Refer to here to configure it. Anyway, legacy nova-network function is officially not recommended.

root@node01:~#

apt-get -y install nova-network

root@node01:~#

echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf

root@node01:~#

sysctl -p

net.ipv4.ip_forward = 1

root@node01:~#

vi /etc/nova/nova.conf

# add follows in [DEFAULT] section

network_driver=nova.network.linux_net
libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtGenericVIFDriver
linuxnet_interface_driver=nova.network.linux_net.LinuxBridgeInterfaceDriver
firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver
network_api_class=nova.network.api.API
security_group_api=nova
network_manager=nova.network.manager.FlatDHCPManager
network_size=254
allow_same_net_traffic=False
multi_host=True
send_arp_for_ha=True
share_dhcp_address=True
force_dhcp_release=True

# Nova API server's hostname or IP address

metadata_host=10.0.0.30

# specify nic for public

public_interface=eth0

# specify any name for bridge

flat_network_bridge=br100

# specify nic for flat DHCP bridge

flat_interface=lo

[keystone_authtoken]

[5]	Start Nova Service. If you don't use legacy nova-network, exclude the word "network" below.

root@node01:~#

for service in api-metadata compute network; do
service nova-$service restart
done

nova-compute stop/waiting
nova-compute start/running, process 2739
nova-network stop/waiting
nova-network start/running, process 2754
nova-api-metadata stop/waiting
nova-api-metadata start/running, process 2773

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