OpenStack Newton : Add Compute Nodes2016/11/17

	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 [3] of the link.
[2]	Install Nova-Compute and so on.

root@node01:~#

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

[3]	Configure Nova.

root@node01:~#

mv /etc/nova/nova.conf /etc/nova/nova.conf.org

root@node01:~#

vi /etc/nova/nova.conf

# create new

[DEFAULT]

# own IP address

my_ip = 10.0.0.51
state_path = /var/lib/nova
enabled_apis = osapi_compute,metadata
osapi_compute_listen = 0.0.0.0
osapi_compute_listen_port = 8774
rootwrap_config = /etc/nova/rootwrap.conf
api_paste_config = /etc/nova/api-paste.ini
auth_strategy = keystone
log_dir = /var/log/nova
rpc_backend = rabbit

# enable VNC

[vnc]
enabled = True
vncserver_listen = 0.0.0.0
vncserver_proxyclient_address = $my_ip
novncproxy_base_url = http://10.0.0.30:6080/vnc_auto.html

# specify Glance server

[glance]
api_servers = http://10.0.0.30:9292

[oslo_concurrency]
lock_path = /var/lib/nova/tmp

# specify RabbitMQ server

[oslo_messaging_rabbit]
rabbit_host = 10.0.0.30
rabbit_port = 5672
rabbit_userid = openstack
rabbit_password = password

# specify Keystone auth info

[keystone_authtoken]
auth_uri = http://10.0.0.30:5000
auth_url = http://10.0.0.30:35357
memcached_servers = 10.0.0.30:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = servicepassword

root@node01:~#

chmod 640 /etc/nova/nova.conf

root@node01:~#

chgrp nova /etc/nova/nova.conf

[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

use_neutron = False
dhcpbridge_flagfile = /etc/nova/nova.conf
dhcpbridge = /usr/bin/nova-dhcpbridge
force_dhcp_release = True
libvirt_use_virtio_for_bridges = True
libvirt_vif_driver = nova.virt.libvirt.vif.LibvirtGenericVIFDriver
linuxnet_interface_driver = nova.network.linux_net.LinuxBridgeInterfaceDriver
firewall_driver = nova.virt.libvirt.firewall.IptablesFirewallDriver
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

# specify nic for public

public_interface = eth0

# specify any name for bridge

flat_network_bridge = br100

# specify nic for flat DHCP bridge

flat_interface = dummy0

root@node01:~#

modprobe dummy

root@node01:~#

echo "alias dummy0 dummy" > /etc/modprobe.d/dummy.conf

root@node01:~#

vi /etc/network/interfaces

# add to the end

auto dummy0
iface dummy0 inet manual

root@node01:~#

ifup dummy0

[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
systemctl restart nova-$service
done

[6]	Verify status on Control Node like follows. If all State is 'up', it's no ploblem.

root@dlp ~(keystone)#

nova service-list

+----+------------------+------------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary           | Host             | Zone     | Status  | State | Updated_at                 | Disabled Reason |
+----+------------------+------------------+----------+---------+-------+----------------------------+-----------------+
| 1  | nova-consoleauth | dlp.srv.world    | internal | enabled | up    | 2016-11-18T05:38:19.000000 | -               |
| 2  | nova-scheduler   | dlp.srv.world    | internal | enabled | up    | 2016-11-18T05:38:19.000000 | -               |
| 3  | nova-conductor   | dlp.srv.world    | internal | enabled | up    | 2016-11-18T05:38:09.000000 | -               |
| 4  | nova-cert        | dlp.srv.world    | internal | enabled | up    | 2016-11-18T05:38:19.000000 | -               |
| 9  | nova-compute     | node01.srv.world | nova     | enabled | up    | 2016-11-18T05:38:18.000000 | -               |
| 10 | nova-network     | node01.srv.world | internal | enabled | up    | 2016-11-18T05:38:18.000000 | -               |
+----+------------------+------------------+----------+---------+-------+----------------------------+-----------------+

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