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OpenStack Newton : Configure Nova2016/10/22
 
Install and Configure OpenStack Compute Service (Nova).
[1]
Install KVM HyperVisor, refer to here.
It's unnecessarry to set Bridge networking on the section [2] of the link.
[2] Add users and others for Nova in Keystone.
# add nova user (set in service project)

[root@dlp ~(keystone)]#
openstack user create --domain default --project service --password servicepassword nova 

+---------------------+----------------------------------+
| Field               | Value                            |
+---------------------+----------------------------------+
| default_project_id  | fb1ebfb4fe2a4ef3918d02932f4de062 |
| domain_id           | default                          |
| enabled             | True                             |
| id                  | ab6661701e1041b7aa106299c981876c |
| name                | nova                             |
| password_expires_at | None                             |
+---------------------+----------------------------------+
# add nova user in admin role

[root@dlp ~(keystone)]#
openstack role add --project service --user nova admin
# add service entry for nova

[root@dlp ~(keystone)]#
openstack service create --name nova --description "OpenStack Compute service" compute 

+-------------+----------------------------------+
| Field       | Value                            |
+-------------+----------------------------------+
| description | OpenStack Compute service        |
| enabled     | True                             |
| id          | 7b25f77f64264cd9bc82d0b2871621a4 |
| name        | nova                             |
| type        | compute                          |
+-------------+----------------------------------+
# define keystone host

[root@dlp ~(keystone)]#
export controller=10.0.0.30
# add endpoint for nova (public)

[root@dlp ~(keystone)]#
openstack endpoint create --region RegionOne compute public http://$controller:8774/v2.1/%\(tenant_id\)s 

+--------------+------------------------------------------+
| Field        | Value                                    |
+--------------+------------------------------------------+
| enabled      | True                                     |
| id           | 36587839b3bd4c8ba1026396abcf62e8         |
| interface    | public                                   |
| region       | RegionOne                                |
| region_id    | RegionOne                                |
| service_id   | 7b25f77f64264cd9bc82d0b2871621a4         |
| service_name | nova                                     |
| service_type | compute                                  |
| url          | http://10.0.0.30:8774/v2.1/%(tenant_id)s |
+--------------+------------------------------------------+
# add endpoint for nova (internal)

[root@dlp ~(keystone)]#
openstack endpoint create --region RegionOne compute internal http://$controller:8774/v2.1/%\(tenant_id\)s 

+--------------+------------------------------------------+
| Field        | Value                                    |
+--------------+------------------------------------------+
| enabled      | True                                     |
| id           | 680786d48ab241e7956f64e9c43a8d8a         |
| interface    | internal                                 |
| region       | RegionOne                                |
| region_id    | RegionOne                                |
| service_id   | 7b25f77f64264cd9bc82d0b2871621a4         |
| service_name | nova                                     |
| service_type | compute                                  |
| url          | http://10.0.0.30:8774/v2.1/%(tenant_id)s |
+--------------+------------------------------------------+
# add endpoint for nova (admin)

[root@dlp ~(keystone)]#
openstack endpoint create --region RegionOne compute admin http://$controller:8774/v2.1/%\(tenant_id\)s 

+--------------+------------------------------------------+
| Field        | Value                                    |
+--------------+------------------------------------------+
| enabled      | True                                     |
| id           | 6d112645fff146bcb18a2ab07178e670         |
| interface    | admin                                    |
| region       | RegionOne                                |
| region_id    | RegionOne                                |
| service_id   | 7b25f77f64264cd9bc82d0b2871621a4         |
| service_name | nova                                     |
| service_type | compute                                  |
| url          | http://10.0.0.30:8774/v2.1/%(tenant_id)s |
+--------------+------------------------------------------+
[3] Install Nova.
# install from Newton, EPEL

[root@dlp ~(keystone)]#
yum --enablerepo=centos-openstack-newton,epel -y install openstack-nova
[4] Add a User and Database on MariaDB for Nova.
[root@dlp ~(keystone)]#
mysql -u root -p 

Enter password:
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 11
Server version: 10.1.17-MariaDB MariaDB Server

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
create database nova;

Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]>
create database nova_api;

Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on nova.* to nova@'localhost' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on nova.* to nova@'%' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on nova_api.* to nova@'localhost' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
grant all privileges on nova_api.* to nova@'%' identified by 'password';

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
flush privileges;

Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]>
exit

Bye
[5] Configure Nova.
[root@dlp ~(keystone)]#
mv /etc/nova/nova.conf /etc/nova/nova.conf.org

[root@dlp ~(keystone)]#
vi /etc/nova/nova.conf
# create new

[DEFAULT]
# define own IP

my_ip = 10.0.0.30
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 connection info

[oslo_messaging_rabbit]
rabbit_host = 10.0.0.30
rabbit_port = 5672
rabbit_userid = openstack
rabbit_password = password
# specify MariaDB server connection info

[api_database]
connection = mysql+pymysql://nova:password@10.0.0.30/nova_api
[database]
connection = mysql+pymysql://nova:password@10.0.0.30/nova
# specify Keystone server 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@dlp ~(keystone)]#
chmod 640 /etc/nova/nova.conf

[root@dlp ~(keystone)]#
chgrp nova /etc/nova/nova.conf

[6] 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@dlp ~(keystone)]#
vi /etc/nova/nova.conf
# add follows in [DEFAULT] section

use_neutron = False
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 you like for bridge

flat_network_bridge = br100
# specify nic for flat DHCP bridge

flat_interface = dummy0
# add a dummy interface which is for the flat DHCP bridge

[root@dlp ~(keystone)]#
cat > /etc/sysconfig/network-scripts/ifcfg-dummy0 <<EOF
DEVICE=dummy0
BOOTPROTO=none
ONBOOT=yes
TYPE=Ethernet
NM_CONTROLLED=no
EOF
[root@dlp ~(keystone)]#
echo "alias dummy0 dummy" > /etc/modprobe.d/dummy.conf

[root@dlp ~(keystone)]#
ifup dummy0

[7] If SELinux is enabled, change policy like follows.
[root@dlp ~(keystone)]#
semanage port -a -t http_port_t -p tcp 8778

[root@dlp ~(keystone)]#
vi nova_pol.te
# create new

module nova_pol 1.0;

require {
        type nova_t;
        type httpd_config_t;
        type httpd_t;
        type nova_log_t;
        type sysctl_net_t;
        type netutils_exec_t;
        class file { read getattr create open execute };
        class dir { write search add_name };
        class capability { kill sys_ptrace };
        class capability2 block_suspend;
}

#============= httpd_t ==============
allow httpd_t nova_log_t:dir { write add_name };
allow httpd_t nova_log_t:file { create open };

#============= nova_t ==============
allow nova_t httpd_config_t:dir search;
allow nova_t netutils_exec_t:file execute;
allow nova_t self:capability kill;
allow nova_t sysctl_net_t:dir search;
allow nova_t sysctl_net_t:file { read getattr open };
allow nova_t self:capability sys_ptrace;
allow nova_t self:capability2 block_suspend;
[root@dlp ~(keystone)]#
checkmodule -m -M -o nova_pol.mod nova_pol.te

checkmodule: loading policy configuration from nova_pol.te
checkmodule: policy configuration loaded
checkmodule: writing binary representation (version 17) to nova_pol.mod
[root@dlp ~(keystone)]#
semodule_package --outfile nova_pol.pp --module nova_pol.mod

[root@dlp ~(keystone)]#
semodule -i nova_pol.pp

[8] If Firewalld is running, allow ports for services.
[root@dlp ~(keystone)]#
firewall-cmd --add-port={6080/tcp,8774/tcp,8775/tcp} --permanent

success
[root@dlp ~(keystone)]#
firewall-cmd --reload

success
[9] Start Nova Services.
If you don't use legacy nova-network, exclude the word "network" below.
[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage api_db sync"

[root@dlp ~(keystone)]#
su -s /bin/bash nova -c "nova-manage db sync"

[root@dlp ~(keystone)]#
for service in api cert consoleauth conductor scheduler compute novncproxy network; do
systemctl start openstack-nova-$service
systemctl enable openstack-nova-$service
done
# show status

[root@dlp ~(keystone)]#
nova service-list 

+----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary           | Host          | Zone     | Status  | State | Updated_at                 | Disabled Reason |
+----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+
| 10 | nova-cert        | dlp.srv.world | internal | enabled | up    | 2016-10-21T16:24:38.000000 | -               |
| 11 | nova-consoleauth | dlp.srv.world | internal | enabled | up    | 2016-10-21T16:24:37.000000 | -               |
| 12 | nova-conductor   | dlp.srv.world | internal | enabled | up    | 2016-10-21T16:24:37.000000 | -               |
| 14 | nova-scheduler   | dlp.srv.world | internal | enabled | up    | 2016-10-21T16:24:38.000000 | -               |
| 15 | nova-compute     | dlp.srv.world | nova     | enabled | up    | 2016-10-21T16:24:38.000000 | -               |
| 16 | nova-network     | dlp.srv.world | internal | enabled | up    | 2016-10-21T16:24:38.000000 | -               |
+----+------------------+---------------+----------+---------+-------+----------------------------+-----------------+
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